Pgm-Fi System — Acura TSX I (2003-2008)

Scheme 1

Scheme 1: Component Location Index

Scheme 2

DTC P0107: MAP Sensor Circuit Low Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 3

Scheme 3: DTC P0107: MAP Sensor Circuit Low Voltage

Scheme 4

Scheme 5

Turn the ignition switch ON (II).
Check the MAP SENSOR in the DATA LIST with the HDS. Is about 3 kPa (1.0 in.Hg, 26 mmHg), or 0.23 V or less indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the MAP sensor 3P connector.
Turn the ignition switch ON (II).
Check the MAP SENSOR in the DATA LIST with the HDS. Is about 3 kPa (1.0 in.Hg, 26 mmHg), or 0.23 V or less indicated? YES -Go to step 9 . NO -Go to step 7.
Measure voltage between MAP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES -Go to step 13 . NO -Go to step 8.
Measure voltage between ECM/PCM connector terminals A21 and A24. Is there about 5 V? YES -Repair open in the wire between the ECM/PCM (A21) and the MAP sensor, then go to step 15 . NO -Go to step 20 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector A (31P).
Check for continuity between MAP sensor 3P connector terminal No. 2 and body ground. Is there continuity ? YES -Repair short in the wire between the ECM/PCM (A30) and the MAP sensor, then go to step 15 . NO -Go to step 21 .
Turn the ignition switch OFF.
Replace the MAP sensor (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0107 indicated? YES -Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Turn the ignition switch OFF.
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0107 indicated? YES -Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0108: MAP Sensor Circuit High Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 6

Scheme 6: DTC P0108: MAP Sensor Circuit High Voltage

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Turn the ignition switch ON (II).
Check the MAP SENSOR in the DATA LIST with the HDS. Is 160 kPa (47.1 in.Hg, 1,197 mmHg), or 4.49 V or more indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the MAP sensor 3P connector.
Connect MAP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
Turn the ignition switch ON (II).
Check the MAP SENSOR in the DATA LIST with the HDS. Is 160 kPa (47.1 in.Hg, 1,197 mmHg), or 4.49 V or more indicated? YES -Go to step 8. NO -Go to step 19 .
Remove the jumper wire from the MAP sensor 3P connector.
Measure voltage between MAP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES -Go to step 15 . NO -Go to step 10.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector A (31P).
Connect MAP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal A24 and body ground. Is there continuity? YES -Go to step 27 . NO -Repair open in the wire between the ECM/PCM (A24) and the MAP sensor, then go to step 21 .
Turn the ignition switch OFF.
Connect ECM/PCM connector terminals A24 and A30 with a jumper wire.
Turn the ignition switch ON (II).
Check the MAP SENSOR in the DATA LIST with the HDS. Is 160 kPa (47.1 in.Hg, 1,197 mmHg), or 4.49 V or more indicated? YES -Go to step 26 . NO -Repair open in the wire between the ECM/PCM (A30) and the MAP sensor, then go to step 21 .
Turn the ignition switch OFF.
Replace the MAP sensor (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0108 indicated? YES -Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Turn the ignition switch OFF.
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0108 indicated? YES -Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTC's are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0111: IAT Sensor Circuit Range/ Performance Problem ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the IAT sensor. Are the connections and terminals OK? YES -Go to step 2. NO -Repair the connectors or terminals, then go to step 15 .
Remove the IAT sensor (see «IAT SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Allow the IAT sensor to cool to ambient temperature.
Note the ambient temperature.
Connect the IAT sensor to its 2P connector, but do not install it on the sensor to the air cleaner.
Turn the ignition switch ON (II).
Note the value of the IAT SENSOR quickly in the DATA LIST with the HDS.
Compare the value of IAT SENSOR and the ambient temperature. Does the value of IAT SENSOR differ 5.4°F (3°C) or more? YES -Go to step 13 . NO -Go to step 9.
Disconnect the IAT sensor from the 2P connector.
Using a heat gun, blow hot air on the IAT sensor for a few seconds. Do not apply the heat longer than a few seconds or you will damage the sensor.
Connect the IAT sensor to its 2P connector, but do not install the sensor to the air cleaner.
Check the IAT SENSOR in the DATA LIST with the HDS. Does the IAT SENSOR change 61°F (34°C) or more? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM. NO -Go to step 13.
Turn the ignition switch OFF.
Replace the IAT sensor (see «IAT SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0111 indicated? YES -Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0112: IAT Sensor Circuit Low Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 11

Scheme 11: DTC P0112: IAT Sensor Circuit Low Voltage

Turn the ignition switch ON (II).
Check the IAT SENSOR in the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the IAT sensor 2P connector.
Turn the ignition switch ON (II).
Check the IAT SENSOR in the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES -Go to step 7. NO -Go to step 11 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector B (24P).
Check for continuity between IAT sensor 2P connector terminal No. 2 and body ground. Is there continuity? YES -Repair short in the wire between the IAT sensor and the ECM/PCM (B17), then go to step 13 . NO -Go to step 18 .
Turn the ignition switch OFF.
Replace the IAT sensor (see «IAT SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0112 indicated? YES -Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0112 indicated? YES -Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0113: IAT Sensor Circuit High Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 12

Scheme 12: DTC P0113: IAT Sensor Circuit High Voltage

Scheme 13

Scheme 14

Scheme 15

Scheme 16

Turn the ignition switch ON (II).
Check the IAT SENSOR in the DATA LIST with the HDS. Is about -40°F (-40°C) or less, or 4.90 V or more indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the IAT sensor 2P connector.
Connect IAT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.
Turn the ignition switch ON (II).
Check the IAT SENSOR in the DATA LIST with the HDS. Is about -40°F (-40°C) or less, or 4.90 V or more indicated? YES -Go to step 8. NO -Go to step 18 .
Turn the ignition switch OFF.
Remove the jumper wire from the IAT sensor 2P connector.
Turn the ignition switch ON (II).
Measure voltage between IAT sensor 2P connector terminal No. 2 and body ground. Is there about 5 V? YES -Go to step 12. NO -Go to step 17 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector A (31P).
Connect IAT sensor 2P connector terminal No. 1 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal A23 and body ground. Is there continuity? YES -Go to step 26 . NO -Repair open in the wire between the ECM/PCM (A23) and the IAT sensor, then go to step 20 .
Measure voltage between ECM/PCM connector terminal B17 and body ground. Is there about 5 V? YES -Repair open in the wire between the ECM/PCM (B17) and the IAT sensor, then go to step 20 . NO -Go to step 25 .
Turn the ignition switch OFF.
Replace the IAT sensor (see «IAT SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0113 indicated? YES -Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Turn the ignition switch OFF.
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0113 indicated? YES -Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0116: ECT Sensor Circuit Range/ Performance Problem ('04-05 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Check the ECT SENSOR in the DATA LIST with the HDS. Is about 176°F (80°C) or more, or 0.86 V or less indicated? YES -Go to step 3. NO -Go to step 7 .
Note the coolant temperature from step 2 .
Turn the ignition switch OFF.
Let the engine cool for 1 hour.
Check the ECT SENSOR in the DATA LIST with the HDS. Did the ECT change 3.6°F (2°C) or more? YES -Intermittent failure, the system is OK at this time. Check the thermostat and the cooling system. NO -Go to step 10 .
Note the coolant temperature.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check the ECT SENSOR in the DATA LIST with the HDS. Does the ECT change 3.6°F (2°C) or more? YES -Intermittent failure, the system is OK at this time. Check the thermostat and the cooling system. NO -Go to step 10.
Turn the ignition switch OFF.
Replace the ECT sensor (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Allow the engine to cool to between 23°F (-5°C) and 77°F (25°C).
Start the engine, and let it idle 20 minutes.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0116 indicated? YES -Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . NO -Go to step 18.
Monitor the OBD STATUS for DTC P0116 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 17 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 15 .

DTC P0116: ECT Sensor 1 Circuit Range/ Performance Problem ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Check ECT SENSOR 1 in the DATA LIST with the HDS. Is about 176°F (80°C) or more, or 0.78 V or less indicated? YES -Go to step 6 . NO -Go to step 3.
Note the value of ECT SENSOR 1 in the DATA LIST with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check ECT SENSOR 1 in the DATA LIST with the HDS. Does ECT SENSOR 1 change 18°F (10°C) or more? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1 and the ECM/PCM. NO -Go to step 11 .
Note the value of ECT SENSOR 1 in the DATA LIST with the HDS.
Turn the ignition switch OFF.
Open the hood, and let the engine cool for 3 hours.
Turn the ignition switch ON (II).
Check ECT SENSOR 1 in the DATA LIST with the HDS. Does ECT SENSOR 1 change 18°F (10°C) or more? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1 and the ECM/PCM. NO -Go to step 11.
Turn the ignition switch OFF.
Replace ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0116 indicated? YES -Check for poor connections or loose terminals at ECT sensor 1 and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0117: ECT Sensor Circuit Low Voltage ('04-05 models); DTC P0117: ECT Sensor 1 Circuit Low Voltage ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). Information marked with an asterisk (*) applies to '04-05 models. Information marked with double asterisk (**) applies to '06-08 models.

Scheme 17

Scheme 17: DTC P0117: ECT Sensor Circuit Low Voltage ('04-05 models); DTC P0117: ECT Sensor 1 Circuit Low Volta

Turn the ignition switch ON (II).
Check the ECT SENSOR (1) in the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the ECT sensor*/ECT sensor 1** and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the ECT sensor*/ECT sensor 1** 2P connector.
Turn the ignition switch ON (II).
Check the ECT SENSOR (Din the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES -Go to step 7. NO -Go to step 11 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector B (24P).
Check for continuity between ECT sensor*/ECT sensor 1** 2P connector terminal No. 1 and body ground. Is there continuity? YES -Repair short in the wire between the ECT sensor* /ECT sensor 1** and the ECM/PCM (B8), then go to step 13 . NO -Go to step 18 .
Turn the ignition switch OFF.
Replace the ECT sensor*/ECT sensor 1** (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0117 indicated? YES -Check for poor connections or loose terminals at the ECT sensor*/ECT sensor 1** and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0117 indicated? YES -Check for poor connections or loose terminals at the ECT sensor*/ECT sensor 1** and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0118: ECT Sensor Circuit High Voltage ('04-05 models); DTC P0118: ECT Sensor 1 Circuit High Voltage ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). Information marked with an asterisk (*) applies to '04-05 models. Information marked with double asterisk (* *) applies to '06-08 models.

Scheme 18

Scheme 18: DTC P0118: ECT Sensor Circuit High Voltage ('04-05 models); DTC P0118: ECT Sensor 1 Circuit High Vol

Scheme 19

Scheme 20

Scheme 21

Scheme 22

Turn the ignition switch ON (II).
Check the ECT SENSOR (1) in the DATA LIST with the HDS. Is about -40°F (-40°C) or less, or 4.90 V or more indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the ECT sensor*/ECT sensor 1** and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the ECT sensor*/ECT sensor 1** 2P connector.
Connect ECT sensor*/ECT sensor 1** 2P connector terminals No. 1 and No. 2 with a jumper wire.
Turn the ignition switch ON (II).
Check the ECT SENSOR (1) in the DATA LIST with the HDS. Is about -40°F (-40°C) or less, or 4.90 V or more indicated? YES -Go to step 8. NO -Go to step 18 .
Turn the ignition switch OFF.
Remove the jumper wire from the ECT sensor*/ECT sensor 1** 2P connector.
Turn the ignition switch ON (II).
Measure voltage between ECT sensor*/ECT sensor 1** 2P connector terminal No. 1 and body ground. Is there about 5 V? YES -Go to step 12. NO -Go to step 17 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector A (31P).
Connect ECT sensor*/ECT sensor 1** 2P connector terminal No. 2 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal A23 and body ground. Is there continuity? YES -Go to step 26 . NO -Repair open in the wire between the ECM/PCM (A23) and the ECT sensor*/ECT sensor 1**, then go to step 20 .
Measure voltage between ECM/PCM connector terminal B8 and body ground. Is there about 5 V? YES -Repair open in the wire between the ECM/PCM (B8) and the ECT sensor*/ECT sensor 1** then go to step 20 . NO -Go to step 25 .
Turn the ignition switch OFF.
Replace the ECT sensor*/ECT sensor 1** (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0118 indicated? YES -Check for poor connections or loose terminals at the ECT sensor*/ECT sensor 1** and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Turn the ignition switch OFF.
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0118 indicated? YES -Check for poor connections or loose terminals at the ECT sensor*/ECT sensor 1** and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0125: ECT Sensor Malfunction/Slow Response ('04-05 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Start the engine, and let it idle.
Check the ECT SENSOR in the DATA LIST with the HDS. Is about 86°F (30°C) or less, or 2.61 V or more indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check the thermostat and the cooling system.
Let the engine idle for 6 minutes.
Check the ECT SENSOR in the DATA LIST with the HDS. Is about 86°F (30°C) or less, or 2.61 V or more indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check the thermostat (see «THERMOSTAT TEST»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system__thermostat-test) ) and the cooling system.
Turn the ignition switch OFF.
Replace the ECT sensor (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Allow the engine to cool to between 23°F (-5°C) and 77°F (25°C).
Start the engine, and let it idle for 20 minutes.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0125 indicated? YES -Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . NO -Go to step 13.
Monitor the OBD STATUS for DTC P0125 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 12 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 10 .

DTC P0125: ECT Sensor 1 Malfunction/Slow Response ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Start the engine, and let it idle 5 minutes or more.
Check ECT SENSOR 1 in the DATA LIST with the HDS. Is about 0°F (-18°C) or less indicated? YES -Go to step 9 . NO -Go to step 3.
Allow the engine to cool to 104°F (40°C) or less.
Note the value of ECT SENSOR 1 and ECT SENSOR 2 in the DATA LIST with the HDS.
Start the engine, and let it idle.
Let the engine idle until ECT SENSOR 1 goes up 40°F (22°C) or more from the recorded temperature.
Note the value of ECT SENSOR 2 in the DATA LIST with the HDS.
Compare ECT SENSOR 2 and the recorded temperature. Did ECT SENSOR 2 change 14°F (8°C) or more? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM. NO -Check the thermostat (see «THERMOSTAT TEST»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system__thermostat-test) ). If the thermostat is OK, go to step 9. If the thermostat is faulty, replace it (see «THERMOSTAT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ), then go to step 11 .
Turn the ignition switch OFF.
Replace ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Allow the engine to cool to ambient temperature.
Start the engine, and let it idle for 20 minutes.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0125 indicated? YES -Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM, then go to step 1 . NO -Go to step 17.
Monitor the OBD STATUS for DTC P0125 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 16 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 14 .

DTC P0128: Cooling System Malfunction ('04-05 models)

P0112, P0113: Intake air temperature (IAT) sensor P0116, P0117, P0118, P0125: Engine coolant temperature (ECT) sensor

P0300: Random misfire

P0301, P0302, P0303, P0304: No. 1, No. 2, No. 3, or No. 4 cylinder misfire

P0335, P0339: Crankshaft position (CKP) sensor P2227, P2228, P2229: Barometric pressure (BARO) sensor

P2646, P2647, P2648, P2649: VTEC system P0506, P0507: Idle control system malfunction

DTC P0128 can occasionally set when the hood is opened while the engine is running.

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Turn the blower switch OFF.
Turn the A/C switch OFF.
Check the FAN CTRL in the DATA LIST with the HDS. Is it OFF? YES -Go to step 6. NO -Wait until the FAN CTRL is off, then go to step 6.
Check the ECT SENSOR in the DATA LIST with the HDS, then check the radiator fan operation. Does the radiator fan keep running when the engine coolant temperature is less than 158°F (70°C)? YES -Check the radiator fan circuit (see «RADIATOR FAN CIRCUIT TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/cooling-fan/#engine-cooling-fan-controls) ), the radiator fan switch circuit for open (see «RADIATOR FAN SWITCH CIRCUIT TROUBLESHOOTING (OPEN)»(/acura/tsx/i-2003-2008/remont/cooling-fan/#engine-cooling-fan-controls) ), the radiator fan switch circuit for short (see «RADIATOR FAN SWITCH CIRCUIT TROUBLESHOOTING (SHORT)»(/acura/tsx/i-2003-2008/remont/cooling-fan/#engine-cooling-fan-controls) ), and the radiator fan switch (see «RADIATOR FAN SWITCH TEST»(/acura/tsx/i-2003-2008/remont/cooling-fan/#engine-cooling-fan-controls) ). If the circuits and the switch are OK, go to step 21 . NO -Go to step 7.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Turn the ignition switch OFF.
Turn the ignition switch ON (II).
Do the RADIATOR FAN TEST in the INSPECTION MENU with the HDS for 20 minutes.
Check the ECT SENSOR in the DATA LIST with the HDS. Is about 151°F (66°C) or less, or 1.25 V or more indicated? YES -Intermittent failure, the system is OK at this time. NO -Go to step 12.
Turn the ignition switch OFF.
Let the engine cool until the coolant temperature (ECT SENSOR) is between 23°F (-5°C) and 95°F (35°C).
Replace the thermostat (see «THERMOSTAT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0128 indicated? YES -Check the cooling system, then go to step 1 . NO -Go to step 20.
Monitor the OBD STATUS for DTC P0128 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 19 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check the cooling system, then go to step 1 . If the screen indicates NOT COMPLETED, let the engine cool until the coolant temperature is between 23°F (-5°C) and 95°F (35°C), then go to step 18 .
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Let the engine cool until the coolant temperature is between 23°F (-5°C) and 95°F (35°C).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0128 indicated? YES -Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 25.
Monitor the OBD STATUS for DTC P0128 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ). If any other Temporary DTCs or DTCs were indicated in step 24 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 22 .

DTC P0128: Cooling System Malfunction ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Turn the blower switch OFF.
Check the FAN CTRL in the DATA LIST with the HDS. Is it OFF? YES -Go to step 5. NO -Wait until the FAN CTRL is off, then go to step 5.
Check the radiator fan operation. Does the radiator fan keep running? YES -Check the radiator fan circuit (see «RADIATOR FAN CIRCUIT TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/cooling-fan/#engine-cooling-fan-controls) ) and the radiator fan relay (see «POWER RELAY TEST»(/acura/tsx/i-2003-2008/remont/body-electrical/#relays__power-relay-test) ). If the circuit and the relay are OK, go to step 19 . NO -Go to step 6.
Let the engine cool until the coolant temperature is 104°F (40°C) or less.
Note the value of ECT SENSOR 1 and ECT SENSOR 2 in the DATA LIST with the HDS.
Start the engine, and let it idle.
Let the engine idle until ECT SENSOR 1 goes up 40°F (22°C) or more from the recorded temperature.
Check ECT SENSOR 2 in the DATA LIST with the HDS.
Compare the recorded value of ECT SENSOR 2 and the present value of ECT SENSOR 2. Did the temperature rise 14°F (8°C) or more? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM. NO -Test the thermostat (see «THERMOSTAT TEST»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system__thermostat-test) ), then go to step 12.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Let the engine cool until the coolant temperature is between 21°F (-6°C) and 104°F (40°C).
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Test-drive at a steady speed between 15-75 mph (24-120 km/h) for 10 minutes.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0128 indicated? YES -Check the cooling system, then go to step 1 . NO -Go to step 18.
Monitor the OBD STATUS for DTC P0128 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 17 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check the cooling system, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 14 .
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Let the engine cool until the coolant temperature is between 21°F (-6°C) and 104°F (40°C).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive at a steady speed between 15-75 mph (24-120 km/h) for 10 minutes.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0128 indicated? YES -Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 20 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 24.
Monitor the OBD STATUS for DTC P0128 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 23 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 20 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 20 .

DTC P0133: A/F Sensor (Sensor 1) Malfunction/Slow Response ('04-05 models)

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 5th gear) Vehicle speed at 30 mph (48 km/h) or more, and engine speed between 1,000 and 3,000 rpm
Monitor the OBD STATUS for DTC P0133 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 6. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 3 and recheck.
Turn the ignition switch OFF.
Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 5th gear) Vehicle speed at 30 mph (48 km/h) or more, and engine speed between 1,000 and 3,000 rpm
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0133 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . NO -Go to step 14.
Monitor the OBD STATUS for DTC P0133 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 13 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 11 .

DTC P0133: A/F Sensor (Sensor 1) Malfunction/Slow Response ('06-08 models)

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) A/T in D position (M/T in 3rd or 4th gear) Drive the vehicle at 25 mph (40 km/h) or less for 5 minutes, then drive at a steady speed between 26-81 mph (41-130 km/h)
Monitor the OBD STATUS for DTC P0133 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 6. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 3 and recheck.
Turn the ignition switch OFF.
Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) A/T in D position (M/T in 3rd or 4th gear) Drive the vehicle at 25 mph (40 km/h) or less for 5 minutes, then drive at a steady speed between 26-81 mph (41-130 km/h)
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0133 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . NO -Go to step 14.
Monitor the OBD STATUS for DTC P0133 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 13 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 11 .

DTC P0134: A/F Sensor (Sensor 1) Heater System Malfunction

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0134 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay (LAF), and the ECM/PCM.
Turn the ignition switch OFF.
Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0134 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay (LAF), and the ECM/PCM, then go to step 1 . NO -Go to step 11.
Monitor the OBD STATUS for DTC P0134 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 10 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay (LAF), and the ECM/PCM, then go to step 1 If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P0135: A/F Sensor (Sensor 1) Heater Circuit Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 23

Scheme 23: DTC P0135: A/F Sensor (Sensor 1) Heater Circuit Malfunction

Scheme 24

Scheme 25

Scheme 26

Scheme 27

Scheme 28

Scheme 29

Scheme 30

Scheme 31

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0135 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay (LAF), and the ECM/PCM.
Turn the ignition switch OFF.
Check these fuses: No. 19 OPTION (40 A) fuse in the under-hood fuse/relay box. No. 4 LAF (10 A) fuse in the under-dash fuse/relay box. No. 23 IGP (7.5 A) fuse in the under-dash fuse/ relay box. Are any of the fuses blown? YES -Repair short in the wire between the A/F sensor relay (LAF) and the fuses. Also replace the blown fuse, then go to step 22 . NO -Go to step 7.
Disconnect the A/F sensor (Sensor 1) 4P connector.
At the sensor side, measure resistance between A/F sensor (Sensor 1) 4P connector terminals No. 3 and No. 4. Is there 2.1-2.9 ohms at room temperature? YES -Go to step 9. NO -Go to step 21 .
At the sensor side, check for continuity between A/F sensor (Sensor 1) 4P connector terminals No. 1 and No. 3, and between terminals No. 1 and No. 4 individually. Is there continuity? YES -Go to step 21 . NO -Go to step 10.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A10 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A10) and the A/F sensor (Sensor 1), then go to step 22 . NO -Go to step 13.
Connect A/F sensor (Sensor 1) 4P connector terminal No. 3 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal A10 and body ground. Is there continuity? YES -Go to step 15. NO -Repair open in the wire between the ECM/PCM (A10) and the A/F sensor (Sensor 1), then go to step 22 .
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove the A/F sensor relay (LAF) (A) from the under-dash fuse/relay box.
Connect A/F sensor (Sensor 1) 4P connector terminal No. 4 to body ground with a jumper wire.
Check for continuity between A/F sensor relay (LAF) 4P connector terminal No. 2 and body ground. Is there continuity? YES -Go to step 18. NO -Repair open in the wire between the A/F sensor (Sensor 1) and the A/F sensor relay (LAF), then go to step 22 .
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E8 and A/F sensor relay (LAF) 4P connector terminal No. 3. Is there continuity? YES -Go to step 20. NO -Repair open in the wire between the ECM/PCM (E8) and the A/F sensor relay (LAF), then go to step 22 .
Check the A/F sensor relay (LAF) (see «POWER RELAY TEST»(/acura/tsx/i-2003-2008/remont/body-electrical/#relays__power-relay-test) ). Is the A/F sensor relay (LAF) OK? YES -Go to step 28 . NO -Replace the A/F sensor relay (LAF), then go to step 22 .
Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0135 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay (LAF), and the ECM/PCM, then go to step 1 . NO -Go to step 27.
Monitor the OBD STATUS for DTC P0135 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 26 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay (LAF), and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine, and let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0135 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay (LAF), and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 30 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 32.
Monitor the OBD STATUS for DTC P0135 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 31 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay (LAF), and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 31 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P0137: Secondary HO2S (Sensor 2) Circuit Low Voltage ('04 model)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 32

Scheme 32: DTC P0137: Secondary HO2S (Sensor 2) Circuit Low Voltage ('04 model)

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check the HO2S S2 in the DATA LIST with the HDS. Does the voltage stay at 0.29 V or less? YES -Go to step 5. NO -Go to step 9 .
Turn the ignition switch OFF.
Disconnect the secondary HO2S (Sensor 2) 4P connector (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Check the HO2S S2 in the DATA LIST with the HDS. Does the voltage stay at 0.29 V or less? YES -Go to step 11 . NO -Go to step 15 .
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 2,000-3,000 rpm Drive about 10 minutes, then decelerate (with the throttle fully closed) for 5 seconds
Monitor the OBD STATUS for DTC P0137 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 15 . NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 9 and recheck.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between secondary HO2S (Sensor 2) 4P connector terminal No. 2 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (E20) and the secondary HO2S (Sensor 2), then go to step 17 . NO -Go to step 25 .
Turn the ignition switch OFF.
Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 2,000-3,000 rpm Drive about 10 minutes, then decelerate (with the throttle fully closed) for 5 seconds
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0137 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . NO -Go to step 24.
Monitor the OBD STATUS for DTC P0137 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 23 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 21 .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 2,000-3,000 rpm Drive about 10 minutes, then decelerate (with the throttle fully closed) for 5 seconds
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0137 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 27 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 30.
Monitor the OBD STATUS for DTC P0137 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ). If any other Temporary DTCs or DTCs were indicated in step 29 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 27 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 27 .

DTC P0137: Secondary HO2S (Sensor 2) Circuit Low Voltage ('05-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 33

Scheme 33: DTC P0137: Secondary HO2S (Sensor 2) Circuit Low Voltage ('05-08 models)

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check the HO2S S2 in the DATA LIST with the HDS. Does the voltage stay at 0.29 V or less? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the secondary HO2S (Sensor 2) 4P connector.
Turn the ignition switch ON (II).
Check the HO2S S2 in the DATA LIST with the HDS. Does the voltage stay at 0.29 V or less? YES -Go to step 9. NO -Go to step 13 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between secondary HO2S (Sensor 2) 4P connector terminal No. 2 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (E20) and the secondary HO2S (Sensor 2), then go to step 15 . NO -Go to step 23 .
Turn the ignition switch OFF.
Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('05 model), Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 1,500-3,000 rpm Drive about 1 minute or more
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0137 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . NO -Go to step 22.
Monitor the OBD STATUS for DTC P0137 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 21 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 19 .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('05 model), Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 1,500-3,000 rpm Drive 1 minute or more
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0137 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 25 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 28.
Monitor the OBD STATUS for DTC P0137 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '05 model (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTC's were indicated in step 27 , go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 25 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 25 .

DTC P0138: Secondary HO2S (Sensor 2) Circuit High Voltage ('04 model)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 34

Scheme 34: DTC P0138: Secondary HO2S (Sensor 2) Circuit High Voltage ('04 model)

Scheme 35

Scheme 36

Scheme 37

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check the HO2S S2 in the DATA LIST with the HDS. Does the voltage stay at 0.75 V or more? YES -Go to step 7 . NO -Go to step 5.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 2,000-3,000 rpm Drive about 10 minutes, then decelerate (with the throttle fully closed) for 5 seconds
Monitor the OBD STATUS for DTC P0138 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 19 . NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 5 and recheck.
Turn the ignition switch OFF.
Disconnect the secondary HO2S (Sensor 2) 4P connector (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Connect secondary HO2S (Sensor 2) 4P connector terminals No. 1 and No. 2 with a jumper wire.
Turn the ignition switch ON (II).
Check the HO2S S2 in the DATA LIST with the HDS. Does the voltage stay at 0.75 V or more? YES -Go to step 12. NO -Go to step 19 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminals E4 and E20. Is there continuity? YES -Go to step 29 . NO -Go to step 16.
Remove the jumper wire from the secondary HO2S (Sensor 2) 4P connector.
Connect secondary HO2S (Sensor 2) 4P connector terminal No. 2 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal E20 and body ground. Is there continuity? YES -Repair open in the wire between the ECM/PCM (E4) and the secondary HO2S (Sensor 2), then go to step 21 . NO -Repair open in the wire between the ECM/PCM (E20) and the secondary HO2S (Sensor 2), then go to step 21 .
Turn the ignition switch OFF.
Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 2,000-3,000 rpm Drive about 10 minutes, then decelerate (with the throttle fully closed) for 5 seconds
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0138 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . NO -Go to step 28.
Monitor the OBD STATUS for DTC P0138 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 27 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 25 .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 2,000-3,000 rpm Drive about 10 minutes, then decelerate (with the throttle fully closed) for 5 seconds
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0138. indicated ? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 31 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 34.
Monitor the OBD STATUS for DTC P0138 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ). If any other Temporary DTCs or DTCs were indicated in step 33 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 31 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 31 .

DTC P0138: Secondary HO2S (Sensor 2) Circuit High Voltage ('05-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 38

Scheme 38: DTC P0138: Secondary HO2S (Sensor 2) Circuit High Voltage ('05-08 models)

Scheme 39

Scheme 40

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine, and let it idle without load (in Park or neutral) until the radiator fan comes on.
Check the HO2S S2 in the DATA LIST with the HDS. Does the voltage stay at 1.25 V or more? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the secondary HO2S (Sensor 2) 4P connector.
Connect secondary HO2S (Sensor 2) 4P connector terminals No. 1 and No. 2 with a jumper wire.
Turn the ignition switch ON (II).
Check the HO2S S2 in the DATA LIST with the HDS. Does the voltage stay at 1.25 V or more? YES -Go to step 10. NO -Go to step 19 .
Turn the ignition switch OFF.
Remove the jumper wire from the secondary HO2S (Sensor 2) 4P connector.
Connect secondary HO2S (Sensor 2) 4P connector terminal No. 2 to body ground with a jumper wire.
Turn the ignition switch ON (II).
Check the HO2S S2 in the DATA LIST with the HDS. Does the voltage stay at 1.25 V or more? YES -Go to step 15. NO -Repair open in the wire between the ECM/PCM (E4) and the secondary HO2S (Sensor 2), then go to step 21 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E20 and body ground. Is there continuity? YES -Go to step 29 . NO -Repair open in the wire between the ECM/PCM (E20) and the secondary HO2S (Sensor 2), then go to step 21 .
Turn the ignition switch OFF.
Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine, and let it idle without load (in Park or neutral) until the radiator fan comes on.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('05 model). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 1,500-3,000 rpm Drive 1 minute or more
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0138 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . NO -Go to step 28.
Monitor the OBD STATUS for DTC P0138 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 27 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 25 .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine, and let it idle without load (in Park or neutral) until the radiator fan comes on.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('05 model). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 1,500-3,000 rpm Drive 1 minute or more
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0138 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 31 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 34.
Monitor the OBD STATUS for DTC P0138 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '05 model (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 33 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 31 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 31 .

DTC P0139: Secondary HO2S (Sensor 2) Slow Response ('04 model)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 2,000-3,000 rpm Drive about 10 minutes, then decelerate (with the throttle fully closed) for 5 seconds
Monitor the OBD STATUS for DTC P0139 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 6. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 3 and recheck.
Turn the ignition switch OFF.
Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) above 158°F (70°C) A/T in D position (M/T in 4th gear) Engine speed at 2,000-3,000 rpm Drive about 10 minutes, then decelerate (with the throttle fully closed) for 5 seconds
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0139 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . NO -Go to step 14.
Monitor the OBD STATUS for DTC P0139 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 13 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 11 .

DTC P0139: Secondary HO2S (Sensor 2) Slow Response ('05-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine, and let it idle without load (in Park or neutral) until the radiator fan comes on.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('05 model), Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) A/T in D position (M/T in 4th gear) Vehicle speed above 35 mph (56 km/h) Drive about 20 seconds
Monitor the OBD STATUS for DTC P0139 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 6. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 3 and recheck.
Turn the ignition switch OFF.
Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine, and let it idle without load (in Park or neutral) until the radiator fan comes on.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('05 model), Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) A/T in D position (M/T in 4th gear) Vehicle speed above 35 mph (56 km/h) Drive about 20 seconds
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0139 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . NO -Go to step 14.
Monitor the OBD STATUS for DTC P0139 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 13 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 11 .

DTC P0141: Secondary HO2S (Sensor 2) Heater Circuit Malfunction

Scheme 41

Scheme 41: DTC P0141: Secondary HO2S (Sensor 2) Heater Circuit Malfunction

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0141 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM.
Turn the ignition switch OFF.
Check the No. 18 ACG (15 A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES -Go to step 7. NO -Repair short in the wire between the secondary HO2S (Sensor 2) and the No. 18 ACG (15 A) fuse. Also replace the No. 18 ACG (15 A) fuse, then go to step 23 .
Disconnect the secondary HO2S (Sensor 2) 4P connector (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
At the secondary HO2S (Sensor 2) side, measure resistance between secondary HO2S (Sensor 2) 4P connector terminals No. 3 and No. 4. Is there 5.4-7.3 ohms at room temperature? YES -Go to step 9. NO -Go to step 22 .
At the secondary HO2S (Sensor 2) side, check for continuity between body ground and secondary HO2S (Sensor 2) 4P connector terminals No. 3 and No. 4 individually. Is there continuity? YES -Go to step 22 . NO -Go to step 10.
Turn the ignition switch ON (II).
Measure voltage between secondary HO2S (Sensor 2) 4P connector terminals No. 3 and No. 4. Is there battery voltage? YES -Go to step 12. NO -Go to step 16 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E21 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (E21) and the secondary HO2S (Sensor 2), then go to step 23 . NO -Go to step 29 .
Measure voltage between secondary HO2S (Sensor 2) 4P connector terminal No. 4 and body ground. Is there battery voltage? YES -Go to step 17. NO -Repair open in the wire between the secondary HO2S (Sensor 2) and the No. 18 ACG (15 A) fuse, then go to step 23 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Connect secondary HO2S (Sensor 2) 4P connector terminal No. 3 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal E21 and body ground. Is there continuity? YES -Go to step 29 . NO -Repair open in the wire between the ECM/PCM (E21) and the secondary HO2S (Sensor 2), then go to step 23 .
Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0141 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . NO -Go to step 28.
Monitor the OBD STATUS for DTC P0141 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 27 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine, and let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0141 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 31 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 33.
Monitor the OBD STATUS for DTC P0141 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 32 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at secondary HO2S (Sensor 2) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 31 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P0171: Fuel System Too Lean; DTC P0172: Fuel System Too Rich

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If some of the DTCs listed below are indicated at the same time as DTC P0171 and/or P0172, troubleshoot those DTCs first, then recheck for P0171 and/or P0172.

P0107, P0108, P1128, P1129: Manifold absolute pressure (MAP) sensor

P0133, P1172 ('05-08 models), P1157, P2195, P2238, P2252, P2A00: Air fuel ratio (A/F) sensor (Sensor 1) P0134, P0135: Air fuel ratio (A/F) sensor (Sensor 1) heater

P0137, P0138, P0139, P2270 ('05-08 models), P2271 ('05-08 models): Secondary HO2S (Sensor 2)

P0141: Secondary HO2S (Sensor 2) heater

P2279: Intake air leakage

P2646, P2647, P2648, P2649: VTEC system

Check the fuel pressure (see «FUEL PRESSURE TEST»(/acura/tsx/i-2003-2008/remont/fuel-system/#fuel-supply-system__fuel-pressure-test) ). Is the fuel pressure OK? YES -Check the engine valve clearances and adjust if necessary (P0172 only) (see «VALVE CLEARANCE ADJUSTMENT»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head__valve-clearance-adjustment) ). If the valve clearances are OK, replace the injectors (see «INJECTOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 2. NO - If the pressure is too high, replace the fuel pressure regulator (see «FUEL PRESSURE REGULATOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/fuel-system/#fuel-supply-system) ), then go to step 2. If the pressure is too low, check the fuel pump and the fuel feed line, then go to step 2.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) A/T in D position (M/T in 4th gear) Drive at a steady speed between 15-75 mph (24-120 km/h) NOTE: DTC P0171 and/or P0172 may take up to 80 minutes of test driving to set. Using the HDS, monitor the air fuel feed back average (AF FB AVE). If the AF FB AVE stays within 0.80-1.25, there is no problem at this time.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0171 or P0172 indicated? YES -Go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0300: Random Misfire and Any Combination of the Following:; DTC P0301: No. 1 Cylinder Misfire Detected; DTC P0302: No. 2 Cylinder Misfire Detected; DTC P0303: No. 3 Cylinder Misfire Detected; DTC P0304: No. 4 Cylinder Misfire Detected

Special Tools Required

Pressure gauge adapter 07NAJ-P07010A
A/T low pressure gauge w/panel 07406-0070301
A/T pressure hose 07406-0020201
A/T pressure hose, 2,210 mm 07MAJ-PY4011A
A/T pressure adapter 07MAJ-PY40120
Oil pressure hose 07ZAJ-S5AA200

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If the misfire is frequent enough to trigger detection of increased emissions during 2 consecutive driving cycles, the MIL will come on, and DTC P0300 (and some combination of P0301 through P0304) will be stored. If the misfire is frequent enough to damage the catalyst, the MIL will flash whenever the misfire occurs, and DTC P0300 (and some combination of P0301 through P0304) will be stored. When the misfire stops, the MIL will remain on. If any of the DTCs listed below are indicated at the same time as the random misfire DTCs, troubleshoot those DTCs first, then recheck for these random misfire DTCs

P0107, P0108, P1128, P1129: Manifold absolute pressure (MAP) sensor

P0171, P0172: Fuel system

P0335, P0339: Crankshaft position (CKP) sensor

P0365, P0369: Camshaft position (CMP) sensor B

P0506, P0507: Idle control system

Scheme 48

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine, and let it idle without load (in Park or neutral).
Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 9 . NO -If the screen indicates PASSED, go to step 5. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, wait for several minutes, and recheck.
Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST for 10 minutes with the HDS. Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE show misfire counts? YES -Go to step 9 . NO -Go to step 6.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 9 . NO -If the screen indicates PASSED, go to step 8. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 6 and recheck.
Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST for 10 minutes with the HDS. Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE show misfire counts? YES -Go to step 9. NO -Intermittent failure, the system is OK at this time.
Turn the ignition switch OFF.
Check the fuel quality. Is the quality good? YES -Go to step 11. NO -Drain the tank and fill it with known-good fuel, then go to step 20 .
Inspect the spark plugs (see «SPARK PLUG INSPECTION»(/acura/tsx/i-2003-2008/remont/ignition-system/#ignition-system) ). If the spark plugs are fouled or worn, replace them.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST for 10 minutes with the HDS. Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE show misfire counts? YES -Go to step 14. NO -Go to step 20 .
Check the fuel pressure (see «FUEL PRESSURE TEST»(/acura/tsx/i-2003-2008/remont/fuel-system/#fuel-supply-system__fuel-pressure-test) ). Is the fuel pressure OK? YES -Go to step 15. NO - If the pressure is too high, replace the fuel pressure regulator (see «FUEL PRESSURE REGULATOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/fuel-system/#fuel-supply-system) ), then go to step 20 . If the pressure is too low, check the fuel pump, the fuel feed pipe, and the fuel filter. If they are OK, replace the fuel pressure regulator (see «FUEL PRESSURE REGULATOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/fuel-system/#fuel-supply-system) ), then go to step 20 .
Turn the ignition switch OFF.
Remove the rocker arm oil pressure switch (VTEC oil pressure switch) (A), and install the special tools as shown, then install the rocker arm oil pressure switch (VTEC oil pressure switch) in the pressure gauge adapter (B). NOTE: Install the parts in the reverse order of removal with a new O-ring.
Reconnect the rocker arm oil pressure switch (VTEC oil pressure switch) 2P connector.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on.
Check the oil pressure at engine speeds of 1,000 and 2,000 rpm. Keep the test time as short as possible (less than 1 minute) because the engine is running without load. Is the oil pressure below 49 kPa (0.5 kgf/cm 2 , 7 psi)? YES -Check for air in the fuel line, then go to step 20. NO -Inspect the VTEC system, then go to step 20.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Clear the CKP pattern with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Do the CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0300, P0301, P0302, P0303, or P0304 indicated? YES -Check for poor connections or loose terminals at the ignition coils, the injectors, and the ECM/PCM, then go to troubleshooting DTC P0301, P0302, P0303, or P0304 (see «DTC P0301: NO. 1 CYLINDER MISFIRE DETECTED; DTC P0302: NO. 2 CYLINDER MISFIRE DETECTED; DTC P0303: NO. 3 CYLINDER MISFIRE DETECTED; DTC P0304: NO. 4 CYLINDER MISFIRE DETECTED»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__dtc-p0301-no-1-cylinder-misfire) ). NO -Go to step 27.
Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 26 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 25 .

DTC P0301: No. 1 Cylinder Misfire Detected; DTC P0302: No. 2 Cylinder Misfire Detected; DTC P0303: No. 3 Cylinder Misfire Detected; DTC P0304: No. 4 Cylinder Misfire Detected

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 49

Scheme 49: DTC P0301: No. 1 Cylinder Misfire Detected; DTC P0302: No. 2 Cylinder Misfire Detected; DTC P0303: N

Scheme 50

Scheme 51

Scheme 52

Scheme 53

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine without load (in Park or neutral), then let it idle.
Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 9 . NO -If the screen indicates PASSED, go to step 5. If the screen indicates EXECUTING or OUT OF CONDITION, keep idling until a result comes on.
Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST for 10 minutes with the HDS. Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE show misfire counts? YES -Go to step 9 . NO -Go to step 6.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 9 . NO -If the screen indicates PASSED, go to step 8. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 6 and recheck.
Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST for 10 minutes with the HDS. Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE show misfire counts? YES -Go to step 9. NO -Intermittent failure, the system is OK at this time. Check for loose wires or poor connections in the fuel system circuit.
Turn the ignition switch OFF.
Remove the engine cover; '04-05 models (see step 3 of «REMOVAL ('04-05 MODELS)»(/acura/tsx/i-2003-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ), '06-08 models (see step 3 of «REMOVAL ('06-08 MODELS)»(/acura/tsx/i-2003-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ).
Start the engine, and listen for a clicking sound at the injector of the problem cylinder. Does the injector click? YES -Go to step 12. NO -Go to step 43 .
Turn the ignition switch OFF.
Exchange the ignition coil from the problem cylinder with one from another cylinder.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST for 10 minutes with the HDS. Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE show misfire counts? YES -Go to step 16. NO -Intermittent misfire due to poor contact at the ignition coil connector (no misfire at this time). Make sure the coil connections are secure.
Determine which cylinder had the misfire. Does the misfire occur in the cylinder where the ignition coil was moved? YES -Replace the faulty ignition coil (see «IGNITION COIL REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/ignition-system/#ignition-system) ), then go to step 62 . NO -Go to step 17.
Turn the ignition switch OFF.
Exchange the spark plug from the problem cylinder with one from another cylinder.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST for 10 minutes with the HDS. Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE show misfire counts? YES -Go to step 21. NO -Intermittent misfire due to spark plug fouling (no misfire at this time).
Determine which cylinder had the misfire. Does the misfire occur in the cylinder where the spark plug was moved? YES -Replace the faulty spark plug, then go to step 62 . NO -Go to step 22.
Turn the ignition switch OFF.
Exchange the injector from the problem cylinder with one from another cylinder.
Start the engine, and let it idle for 2 minutes.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST for 10 minutes with the HDS. Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE show misfire counts? YES -Go to step 27. NO -Intermittent misfire due to bad contact in the injector connector (no misfire at this time). Check for poor connections or loose terminals at the injector.
Determine which cylinder had the misfire. Does the misfire occur in the cylinder where the injector was moved? YES -Replace the faulty injector (see «INJECTOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 62 . NO -Go to step 28.
Turn the ignition switch OFF.
Disconnect the ignition coil 3P connector from the problem cylinder.
Turn the ignition switch ON (II).
Measure voltage between ignition coil 3P connector terminal No. 3 and body ground. Is there battery voltage? YES -Go to step 32. NO -Repair open in the wire between the ignition coil and the ignition coil relay, then go to step 62 .
Turn the ignition switch OFF.
Check for continuity between ignition coil 3P connector terminal No. 2 and body ground. Is there continuity? YES -Go to step 34. NO -Repair open in the wire between the ignition coil and G101, then go to step 62 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector A (31P).
Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). PROBLEM CYLINDER, ECM/PCM TERMINALS AND WIRE COLOR REFERENCE PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOR No. 1 P0301 A16 YEL/GRN No. 2 P0302 A15 BLU/RED No. 3 P0303 A14 WHT/BLU No. 4 P0304 A13 BRN Is there continuity? YES -Repair short in the wire between the ECM/PCM and the ignition coil, then go to step 62 . NO -Go to step 38.
Connect appropriate ignition coil 3P connector terminal No. 1 to body ground with a jumper wire (see table). PROBLEM CYLINDER, ECM/PCM TERMINALS AND WIRE COLOR REFERENCE PROBLEM CYLINDER DTC WIRE COLOR No. 1 P0301 YEL/GRN No. 2 P0302 BLU/RED No. 3 P0303 WHT/BLU No. 4 P0304 BRN
Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). PROBLEM CYLINDER, ECM/PCM TERMINALS AND WIRE COLOR REFERENCE PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOR No. 1 P0301 A16 YEL/GRN No. 2 P0302 A15 BLU/RED No. 3 P0303 A14 WHT/BLU No. 4 P0304 A13 BRN Is there continuity? YES -Go to step 40. NO -Repair open in the wire between the ECM/PCM and the ignition coil, then go to step 62 .
Reconnect the ignition coil 3P connector and ECM/PCM connector A (31P).
Do an engine compression and a cylinder leakdown test (see «ENGINE COMPRESSION INSPECTION»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head__engine-compression-inspection) ). Did the engine pass both tests? YES -Go to step 42. NO -Repair the engine, then go to step 62 .
Do the VTEC rocker arm test (see «VTEC ROCKER ARM TEST»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head__vtec-rocker-arm-test) ). Did the VTEC rocker arm pass the test? YES -Go to step 71 . NO -Repair as necessary, then go to step 62 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector B (24P).
Turn the ignition switch ON (II).
Measure voltage between body ground and the appropriate ECM/PCM connector terminal (see table). PROBLEM CYLINDER, ECM/PCM TERMINALS AND WIRE COLOR REFERENCE PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOR No. 1 P0301 B5 BRN No. 2 P0302 B4 RED No. 3 P0303 B3 BLU No. 4 P0304 B2 YEL Is there battery voltage? YES -Go to step 56 . NO -Go to step 48.
Turn the ignition switch OFF.
Disconnect the injector 2P connector from the problem cylinder.
Turn the ignition switch ON (II).
Measure voltage between injector 2P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 52. NO -Repair open in the wire between the injector and PGM-FI main relay 1 (FI MAIN), then go to step 62 .
Turn the ignition switch OFF.
Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). PROBLEM CYLINDER, ECM/PCM TERMINALS AND WIRE COLOR REFERENCE PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOR No. 1 P0301 B5 BRIM No. 2 P0302 B4 RED No. 3 P0303 B3 BLU No. 4 P0304 B2 YEL Is there continuity? YES -Repair short in the wire between the ECM/PCM and the injector, then go to step 62 . NO -Go to step 54.
Connect appropriate injector 2P connector terminal No. 2 to body ground with a jumper wire (see table). PROBLEM CYLINDER, ECM/PCM TERMINALS AND WIRE COLOR REFERENCE PROBLEM CYLINDER DTC WIRE COLOR No. 1 P0301 BRN No. 2 P0302 RED No. 3 P0303 BLU No. 4 P0304 YEL
Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). PROBLEM CYLINDER, ECM/PCM TERMINALS AND WIRE COLOR REFERENCE PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOR No. 1 P0301 B5 BRN No. 2 P0302 B4 RED No. 3 P0303 B3 BLU No. 4 P0304 B2 YEL Is there continuity? YES -Go to step 56. NO -Repair open in the wire between the ECM/PCM and the injector, then go to step 62 .
Measure resistance between injector 2P connector terminals No. 1 and No. 2. Is there 10-13 ohms? YES -Go to step 57. NO -Replace the injector (see «INJECTOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 62 .
Substitute a known-good injector into the problem cylinder.
Reconnect all connectors.
Start the engine, and let it idle for 2 minutes.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Check the CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE in the DATA LIST for 10 minutes with the HDS. Does CYL1 MISFIRE, CYL2 MISFIRE, CYL3 MISFIRE, and/or CYL4 MISFIRE show misfire counts? YES -Go to step 71 . NO -Replace the original injector (see «INJECTOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 62.
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Clear the CKP pattern with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Do the CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0301, P0302, P0303, or P0304 are indicated? YES -Check for poor connections or loose terminals at the ignition coils, the injectors, and the ECM/PCM, then go to troubleshooting DTC P0300, P0301, P0302, P0303, or P0304 (see «DTC P0300: RANDOM MISFIRE AND ANY COMBINATION OF THE FOLLOWING:; DTC P0301: NO. 1 CYLINDER MISFIRE DETECTED; DTC P0302: NO. 2 CYLINDER MISFIRE DETECTED; DTC P0303: NO. 3 CYLINDER MISFIRE DETECTED; DTC P0304: NO. 4 CYLINDER MISFIRE DETECTED»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__dtc-p0300-random-misfire-and-any) ). NO -Go to step 70.
Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 69 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the ignition coils, the injectors, and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 68 .
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS REL TP SENSOR CLV (calculated load value) APP SENSOR
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0301, P0302, P0303, or P0304 are indicated? YES -Check for poor connections or loose terminals at the injectors, the ignition coils, and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 72 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 74.
Monitor the OBD STATUS for DTC P0301, P0302, P0303, or P0304 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 73 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the ignition coils, the injectors, and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 72 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 72 .

DTC P0325: Knock Sensor Circuit Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 60

Scheme 60: DTC P0325: Knock Sensor Circuit Malfunction

Scheme 61

Scheme 62

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Hold the engine speed between 3,000-4,000 rpm for at least 10 seconds.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0325 indicated? YES -Go to step 6. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the knock sensor and the ECM/PCM.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the knock sensor 1P connector.
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A1 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A1) and the knock sensor, then go to step 14 . NO -Go to step 11.
Connect the knock sensor 1P connector terminal to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal A1 and body ground. Is there continuity? YES -Go to step 13. NO -Repair open in the wire between the ECM/PCM (A1) and the knock sensor, then go to step 14 .
Replace the knock sensor (see «IAT SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Hold the engine speed between 3,000-4,000 rpm for at least 10 seconds.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0325 indicated? YES -Go to step 21 . NO -Go to step 20.
Monitor the OBD STATUS for DTC P0325 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 19 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates NOT COMPLETED, go to step 17 and recheck.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Hold the engine speed between 3,000-4,000 rpm for at least 10 seconds.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0325 indicated? YES -Check for poor connections or loose terminals at the knock sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 24.
Monitor the OBD STATUS for DTC P0325 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 23 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the knock sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 22 .

DTC P0335: CKP Sensor No Signal

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 63

Scheme 63: DTC P0335: CKP Sensor No Signal

Scheme 64

Scheme 65

Scheme 66

Scheme 67

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0335 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the CKP sensor and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the CKP sensor 3P connector.
Turn the ignition switch ON (II).
Measure voltage between CKP sensor 3P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 9. NO -Repair open in the wire between the CKP sensor and PGM-FI main relay 1 (FI MAIN), then go to step 18 .
Measure voltage between CKP sensor 3P connector terminal No. 2 and body ground. Is there about 5 V? YES -Go to step 10. NO -Go to step 11 .
Measure voltage between CKP sensor 3P connector terminals No. 1 and No. 3. Is there battery voltage? YES -Go to step 16 . NO -Repair open in the wire between the CKP sensor and G101, then go to step 18 .
Measure voltage between ECM/PCM connector terminal A7 and body ground. Is there about 5 V? YES -Repair open in the wire between the ECM/PCM (A7) and the CKP sensor, then go to step 18 . NO -Go to step 12.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A7 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A7) and the CKP sensor, then go to step 18 . NO -Go to step 25 .
Turn the ignition switch OFF.
Replace the CKP sensor (see «CKP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Clear the CKP pattern with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Do the CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0335 indicated? YES -Check for poor connections or loose terminals at the CKP sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0335 indicated? YES -Check for poor connections or loose terminals at the CKP sensor and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0339: CKP Sensor Circuit Intermittent Interruption

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine, and let it idle for 10 seconds.
Check the CKP NOISE in the DATA LIST with the HDS. Are 0 counts indicated? YES -Go to step 7 . NO -Go to step 5.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS
Check the CKP NOISE in the DATA LIST with the HDS. Are 0 counts indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the CKP sensor and the ECM/PCM.
Check for poor or loose connections and terminals at these locations: CKP sensor ECM/PCM Engine ground Body ground Are the connections and terminals OK? YES -Go to step 8. NO -Repair the connectors or terminals, then go to step 11 .
Remove the cam chain case (see «CAM CHAIN REMOVAL»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head__cam-chain-removal) ), and check for damage on the CKP sensor pulse plate. Is the pulse plate damaged? YES -Replace the CKP sensor pulse plate, then go to step 11 . NO -Go to step 9.
Turn the ignition switch OFF.
Replace the CKP sensor (see «CKP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Clear the CKP pattern with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Do the CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).
Start the engine, and let it idle for 10 seconds.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0339 indicated? YES -Check for poor connections or loose terminals at the CKP sensor and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0365: CMP Sensor B No Signal

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 68

Scheme 68: DTC P0365: CMP Sensor B No Signal

Scheme 69

Scheme 70

Scheme 71

Scheme 72

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0365 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at CMP sensor B and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the CMP sensor B 3P connector.
Turn the ignition switch ON (II).
Measure voltage between CMP sensor B 3P connector terminal No. 3 and body ground. Is there battery voltage? YES -Go to step 9. NO -Repair open in the wire between CMP sensor B and PGM-FI main relay 1 (FI MAIN), then go to step 18 .
Measure voltage between CMP sensor B 3P connector terminal No. 1 and body ground. Is there about 5 V? YES -Go to step 10. NO -Go to step 11 .
Measure voltage between CMP sensor B 3P connector terminals No. 2 and No. 3. Is there battery voltage? YES -Go to step 16 . NO -Repair open in the wire between CMP sensor B and G101, then go to step 18 .
Measure voltage between ECM/PCM connector terminal A6 and body ground. Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A6) and CMP sensor B, then go to step 18 . NO -Go to step 12.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A6 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A6) and CMP sensor B, then go to step 18 . NO -Go to step 23 .
Turn the ignition switch OFF.
Replace CMP sensor B (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0365 indicated? YES -Check for poor connections or loose terminals at CMP sensor B and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0365 indicated? YES -Check for poor connections or loose terminals at CMP sensor B and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTC's are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0369: CMP Sensor B Circuit Intermittent Interruption

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine, and let it idle for 10 seconds.
Check the CMP B NOISE in the DATA LIST with the HDS. Are 0 counts indicated? YES -Go to step 7 . NO -Go to step 5.
Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: ENGINE SPEED VSS
Check the CMP B NOISE in the DATA LIST with the HDS. Are 0 counts indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at CMP sensor B and the ECM/PCM.
Check for poor or loose connections and terminals at these locations: CMP sensor B ECM/PCM Engine ground Body ground Are the connections and terminals OK? YES -Go to step 8. NO -Repair the connectors or terminals, then go to step 11 .
Check for damage on the CMP sensor B pulse plate (see «CMP PULSE PLATE B REPLACEMENT»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ). Is the pulse plate damaged? YES -Replace the CMP sensor B pulse plate (see «CMP PULSE PLATE B REPLACEMENT»(/acura/tsx/i-2003-2008/remont/mechanical/#cylinder-head) ), then go to step 11 . NO -Go to step 9.
Turn the ignition switch OFF.
Replace CMP sensor B (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine, and let it idle for 10 seconds.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0369 indicated? YES -Check for poor connections or loose terminals at CMP sensor B and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0562: Charging System Low Voltage ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If any high current load accessories are installed, this DTC can be set. If DTC P16BB and/or P16BC is stored at the same time as DTC P0562, troubleshoot DTC P16BB and/or P16BC first, then recheck for DTC P0562.

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine.
Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0562 indicated? YES -Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/charging-system/#charging-system) ), then go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, and check the battery performance (see «BATTERY TEST»(/acura/tsx/i-2003-2008/remont/body-electrical/#battery) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine.
Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0562 indicated? YES -Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0563: ECM/PCM Power Source Circuit Unexpected Voltage

Scheme 73

Scheme 73: DTC P0563: ECM/PCM Power Source Circuit Unexpected Voltage

Scheme 74

Scheme 75

Scheme 76

Scheme 77

Scheme 78

Scheme 79

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Turn the ignition switch OFF.
Wait 10 seconds.
Turn the ignition switch ON (II).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0563 indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the No. 8 FI ECU (ECM/PCM) (15 A) fuse in the under-hood fuse/relay box, PGM-FI main relay 1 (FI MAIN), and the ECM/PCM.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage? YES -Go to step 13 . NO -Go to step 11.
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box.
Check for continuity between ECM/PCM connector terminal E7 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (E7) and PGM-FI main relay 1 (FI MAIN), then go to step 20 . NO -Go to step 19 .
Reconnect ECM/PCM connector E (31P).
Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage? YES -Go to step 15. NO -Go to step 27 .
Disconnect ECM/PCM connector A (31P).
Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually. Is there battery voltage? YES -Go to step 17. NO -Go to step 27 .
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box.
Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually. Is there battery voltage? YES -Repair short to power in the wire between the ECM/PCM (A2, A3) and PGM-FI main relay 1 (FI MAIN), then go to step 20 . NO -Go to step 19.
Test PGM-FI main relay 1 (FI MAIN) (see «POWER RELAY TEST»(/acura/tsx/i-2003-2008/remont/body-electrical/#relays__power-relay-test) ). Is PGM-FI main relay 1 (FI MAIN) OK? YES -Go to step 27 . NO -Replace PGM-FI main relay 1 (FI MAIN), then go to step 20.
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Turn the ignition switch OFF.
Wait 10 seconds.
Check for Temporary DTCs or DTCs With the HDS. Is DTC P0563 indicated? YES -Check for poor connections or loose terminals at PGM-FI main relay 1 (FI MAIN) and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0563 indicated? YES -Check for poor connections or loose terminals at PGM-FI main relay 1 (FI MAIN) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0602: ECM/PCM Programming Error ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). This DTC is indicated when the ECM/PCM update is not completed. Do not turn the ignition switch OFF while updating the ECM/PCM. If you turn the ignition switch OFF before completion, the ECM/PCM can be damaged.

Do the ECM/PCM update procedure (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0602 indicated? YES -Replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Update is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0603: ECM/PCM Internal Control Module Keep Alive Memory (KAM) Error ('04-06 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0603 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0606: ECM/PCM Processor Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Turn the ignition switch OFF.
Turn the ignition switch ON (II).
Wait 40 seconds.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0606 indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Turn the ignition switch OFF.
Turn the ignition switch ON (II).
Wait 40 seconds.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0606 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 8 . If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P062F: ECM/PCM Internal Control Module Keep Alive Memory (KAM) Error ('07-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P062F indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0630: VIN Not Programmed or Mismatch ('05-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). This DTC is stored only when the ECM/PCM does not have the VIN information of the vehicle. Use the HDS to input the missing VIN information. Information marked with an asterisk (*) applies to '07-08 models

Turn the ignition switch ON (II).
Check the VIN with the HDS. Does the HDS show the vehicle's VIN? YES -Go to step 5 . NO -Go to step 3.
Input the VIN to the ECM/PCM with the HDS. Does the screen show COMPLETE? YES -Go to step 5 . NO -Go to step 4.
Check for DTCs with the HDS. Is DTC P0603 (P062F*) indicated? YES -Go to the «DTC P0603»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__dtc-p0603-ecmpcm-internal-control-module) (P062F*) troubleshooting. NO -Go to step 9 .
Clear the DTC with the HDS.
Turn the ignition switch OFF.
Turn the ignition switch ON (II), and wait 5 seconds.
Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES -Go to step 9. NO -Intermittent failure, the system is OK at this time. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0630 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '05 model (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0685: ECM/PCM Power Control Circuit/ Internal Circuit Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If the problem doesn't return after you clear the DTC, or it this DTC is stored intermittently, check for loose terminals at the IGP line connectors before replacing the ECM/PCM.

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine, then let it idle for 30 seconds.
Turn the ignition switch OFF.
Start the engine, then let it idle for 30 seconds.
Turn the ignition switch OFF.
Turn the ignition switch ON (II).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0685 indicated? YES -Go to step 9. NO -Intermittent failure, the system is OK at this time.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine, then let it idle for 30 seconds.
Turn the ignition switch OFF.
Start the engine, then let it idle for 30 seconds.
Turn the ignition switch OFF.
Turn the ignition switch ON (II).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0685 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 10 . If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P0700: A/T Control System Malfunction

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). This DTC is stored when there is a problem in the A/T control system. Check for A/T DTCs with the HDS, and go to the INDICATED DTCS TROUBLESHOOTING .

DTC P0720: Output Shaft (Countershaft) Speed Sensor Circuit Malfunction

Scheme 80

Scheme 80: DTC P0720: Output Shaft (Countershaft) Speed Sensor Circuit Malfunction

Scheme 81

Scheme 82

Scheme 83

Scheme 84

Start the engine. Hold the engine speed at 3,000 rpm without load (in neutral) until the radiator fan comes on, then let it idle.
Test-drive several miles.
Check the C SHAFT SPD in the DATA LIST with the HDS. Is any vehicle speed indicated? YES -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and the ECM. NO -Go to step 4.
Turn the ignition switch OFF.
Disconnect the output shaft (countershaft) speed sensor 3P connector.
Turn the ignition switch ON (II).
Measure voltage between output shaft (countershaft) speed sensor 3P connector terminal No. 1 and body ground. Is there about 5 V? YES -Go to step 8. NO -Repair open in the wire between the ECM (A20) and the output shaft (countershaft) speed sensor, then go to step 17 .
Measure voltage between output shaft (countershaft) speed sensor 3P connector terminal No. 2 and body ground. Is there about 5 V? YES -Go to step 9. NO -Go to step 10 .
Measure voltage between output shaft (countershaft) speed sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES -Go to step 15 . NO -Repair open in the wire between the output shaft (countershaft) speed sensor and G101 (ECM (A23))*, then go to step 17 .
Measure voltage between ECM connector terminal A18 and body ground. Is there about 5 V? YES -Repair open in the wire between the ECM (A18) and the output shaft (countershaft) speed sensor, then go to step 17 . NO -Go to step 11.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM connector A (31P).
Check for continuity between ECM connector terminal A18 and body ground. Is there continuity? YES -Repair short in the wire between the ECM (A18) and the output shaft (countershaft) speed sensor, then go to step 17 . NO -Go to step 24 .
Turn the ignition switch OFF.
Replace the output shaft (countershaft) speed sensor (see «CKP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM with the HDS.
Do the ECM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models), Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) Transmission in 5th gear Engine speed at 2,000-3,000 rpm Drive for several minutes, then decelerate (with the throttle fully closed) for 8 seconds
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0720 indicated? YES -Check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and the ECM, then go to step 1 . NO -Go to step 23.
Monitor the OBD STATUS for DTC P0720 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 22 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and the ECM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 21 .
Reconnect all connectors.
Update the ECM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°C (70°C) Transmission in 5th gear Engine speed at 2,000-3,000 rpm Drive for several minutes, then decelerate (with the throttle fully closed) for 8 seconds
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0720 indicated? YES -Check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and the ECM. If the ECM was updated, substitute a known-good ECM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 26 . If the ECM was substituted, go to step 1 . NO -Go to step 28.
Monitor the OBD STATUS for DTC P0720 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 27 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and the ECM. If the ECM was updated, substitute a known-good ECM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 26 . If the ECM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 26 .

DTC P1109: BARO Sensor Circuit Out of Range High ('05-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Reset the ECM/PCM with the HDS.
Start the engine.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1109 indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1109 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '05 model (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P1116: ECT Sensor 1 Circuit Range/ Performance Problem ('06-08 models)

Check for poor connections or loose terminals at ECT sensor 1 and ECT sensor 2. Are the connections and terminals OK? YES -Go to step 2. NO -Repair the connectors or terminals, then go to step 27 .
Turn the ignition switch ON (II).
Check for Temporary DTCs or DTCs with the HDS. Are DTC P1116 and P2183 indicated at the same time? YES -Go to step 15 . NO -Go to step 4.
Start the engine, and let it idle for 10 minutes.
Check ECT SENSOR 1 in the DATA LIST with the HDS. Is about 115°F (46°C) or less indicated? YES -Replace ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 27 . NO -Go to step 6.
Turn the ignition switch OFF.
Drain the coolant (see «COOLANT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ).
Remove ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Allow ECT sensor 1 to cool to the ambient temperature.
Note the ambient temperature.
Connect ECT sensor 1 to the 2P connector, but do not install it on the engine.
Turn the ignition switch ON (II).
Note the value of ECT SENSOR 1 quickly in the DATA LIST with the HDS.
Compare the value of ECT SENSOR 1 and the ambient temperature. Does the value of ECT SENSOR 1 differ 5.4°F (3°C) or more? YES -Replace ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 27 . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM.
Start the engine, and let it idle for 10 minutes.
Check ECT SENSOR 1 in the DATA LIST with the HDS. Is about 115°F (46°C) or less indicated? YES -Replace ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 27 . NO -Go to step 17.
Let the engine idle for 10 minutes.
Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 131°F (55°C) or less indicated? YES -Replace ECT sensor 2 (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 27 . NO -Go to step 19.
Turn the ignition switch OFF.
Drain the coolant (see «COOLANT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ).
Remove ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ) and ECT sensor 2 (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Allow the sensors to cool to the ambient temperature.
Note the ambient temperature.
Connect ECT sensor 1 to the 2P connector, and ECT sensor 2 to the 2P connector, but do not install them on the engine and the radiator.
Note the value of ECT SENSOR 1 and ECT SENSOR 2 quickly in the DATA LIST with the HDS.
Compare the value of ECT SENSOR 1 and the ambient temperature, and the value of ECT SENSOR 2 and the ambient temperature individually. Does one of the sensors differ more than 5.4°F (3°C) from the ambient temperature? YES -Replace the sensor that differed more than 5.4°F (3°C) from the ambient temperature, then go to step 27. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1116 indicated? YES -Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P1128: MAP Sensor Signal Lower Than Expected

Turn the ignition switch ON (II).
Check the MAP SENSOR in the DATA LIST with the HDS. Is less than 54.1 kPa (16.0 in.Hg, 406 mmHg) or 1.61 V held for more than 5 seconds? YES -Go to step 7 . NO -Go to step 3.
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) Engine speed between 1,400-7,000 rpm A/T in D position (M/T in 3rd gear) Vehicle speed above 15 mph (24 km/h)
Monitor the OBD STATUS for DTC P1128 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 7. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM. If the screen indicates NOT COMPLETED, go to step 4 and recheck.
Turn the ignition switch OFF.
Replace the MAP sensor (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models), Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) Engine speed between 1,400-7,000 rpm A/T in D position (M/T in 3rd gear) Vehicle speed above 15 mph (24 km/h)
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1128 indicated? YES -Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . NO -Go to step 15.
Monitor the OBD STATUS for DTC P1128 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 14 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 12 .

DTC P1129: MAP Sensor Signal Higher Than Expected

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Check for vacuum leaks in these parts: PCV valve PCV hose EVAP canister purge valve Throttle body Intake manifold Brake booster hose Brake booster Are there any vacuum leaks? YES -Repair or replace parts with vacuum leaks, then go to step 9 . NO -Go to step 2.
Start the engine. Hold the engine speed at 3.000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check the MAP SENSOR in the DATA LIST with the HDS. Is more than 36.9 kPa (11.0 in.Hg, 277 mmHg) or 1.1 V held for more than for 5 seconds? YES -Go to step 7 . NO -Go to step 4.
Clear the DTC with the HDS.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models), Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) Engine speed between 1,400 and 7,000 rpm A/T in D position (M/T in 5th gear) Drive at a steady speed between 55-75 mph (88-120 km/h) for 10 seconds Driving the drive, decelerate (with throttle fully closed) for 2 seconds or more
Monitor the OBD STATUS for DTC P1129 in the DTCs MENU with the HDS. Does the screen Indicate FAILED? YES -Go to step 7. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM. If the screen indicates NOT COMPLETED, go to step 5 and recheck.
Turn the ignition switch OFF.
Replace the MAP sensor (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) Engine speed between 1,400 and 7,000 rpm A/T in D position (M/T in 5th gear) Drive at a steady speed between 55-75 mph (88-120 km/h) for 10 seconds During the drive, decelerate (with throttle fully closed) for 2 seconds or more
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1129 indicated? YES -Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . NO -Go to step 15.
Monitor the OBD STATUS for DTC P1129 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 14 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 12 .

DTC P1157: A/F Sensor (Sensor 1) AFS Circuit High Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 85

Scheme 85: DTC P1157: A/F Sensor (Sensor 1) AFS Circuit High Voltage

Scheme 86

Scheme 87

Scheme 88

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine, and wait 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1157 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the A/F sensor (Sensor 1) 4P connector.
Disconnect ECM/PCM connector A (31P).
Connect A/F sensor (Sensor 1) 4P connector terminals No. 1 and No. 2 with a jumper wire.
Check for continuity between ECM/PCM connector terminals A28 and A31. Is there continuity? YES -Go to step 14 . NO -Go to step 11.
Remove the jumper wire from the A/F sensor (Sensor 1) 4P connector.
Connect A/F sensor (Sensor 1) 4P connector terminal No. 2 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal A31 and body ground. Is there continuity? YES -Repair open in the wire between the ECM/PCM (A28) and the A/F sensor (Sensor 1), then go to step 15 . NO -Repair open in the wire between the ECM/PCM (A31) and the A/F sensor (Sensor 1), then go to step 15 .
Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1157 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the connector and terminal fits are OK, go to step 21 . NO -Go to step 20.
Monitor the OBD STATUS for DTC P1157 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 19 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine, and let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1157 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 24.
Monitor the OBD STATUS for DTC P1157 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 23 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, go to step 1 . If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P1172: A/F Sensor (Sensor 1) Circuit Out of Range High ('05-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Monitor the OBD STATUS for DTC P1172 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 5. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicated OUT OF CONDITION, go to step 3 and recheck.
Turn the ignition switch OFF.
Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1172 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . NO -Go to step 12.
Monitor the OBD STATUS for DTC P1172 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 11 , go to the «INDICATES DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 10 .

DTC P1297: ELD Circuit Low Voltage

Scheme 89

Scheme 89: DTC P1297: ELD Circuit Low Voltage

Turn the ignition switch ON (II).
Check the ELD in the DATA LIST with the HDS. Is 72 A or more indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the ELD 3P connector.
Turn the ignition switch ON (II).
Check the ELD in the DATA LIST with the HDS. Is 72 A or more indicated? YES -Go to step 7. NO -Go to step 11 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E15 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (E15) and the ELD, then go to step 13 . NO -Go to step 20 .
Turn the ignition switch OFF.
Replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/body-electrical/#under-hood-fuserelay-box) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine.
Turn on the headlights.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1297 indicated? YES -Check for poor connections or loose terminals at the ELD and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine.
Turn on the headlights.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1297 indicated? YES -Check for poor connections or loose terminals at the ELD and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 22 . If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P1298: ELD Circuit High Voltage

Scheme 90

Scheme 90: DTC P1298: ELD Circuit High Voltage

Scheme 91

Scheme 92

Scheme 93

Start the engine, and let it idle.
Check the ELD in the DATA LIST with the HDS. Is 0.2 A or less indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the ELD 3P connector.
Turn the ignition switch ON (II).
Measure voltage between ELD 3P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 7. NO -Check the No. 18 ACG (15 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 18 ACG (15 A) fuse and the ELD, then go to step 14 .
Turn the ignition switch OFF.
Connect ELD 3P connector terminal No. 3 to body ground with a jumper wire.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E15 and body ground. Is there continuity? YES -Go to step 12. NO -Repair open in the wire between the ECM/PCM (E15) and the ELD, then go to step 14 .
Check for continuity between ELD 3P connector terminal No. 2 and body ground. Is there continuity? YES -Go to step 13. NO -Repair open in the wire between the ELD and G302, then go to step 14 .
Replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/body-electrical/#under-hood-fuserelay-box) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1298 indicated? YES -Go to step 19. NO -Troubleshooting is complete.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1298 indicated? YES -Check for poor connections or loose terminals at the ELD and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P1549: Charging System High Voltage ('06-08 models)

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine.
Check under these conditions: A/C off Headlights off Rear window defogger off
Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1549 indicated? YES -Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/charging-system/#charging-system) ), then go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine.
Check under these conditions: A/C off Headlights off Rear window defogger off
Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P1549 indicated? YES -Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P16BB: Alternator B Terminal Circuit Low Voltage ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with HDS.
Start the engine.
Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BB indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, and check the battery performance (see «BATTERY TEST»(/acura/tsx/i-2003-2008/remont/body-electrical/#battery) ).
Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box Are the connections and terminals OK? YES -Go to step 8. NO -Repair the connections or terminals, then go to step 9 .
Check for an open in the wire between the alternator and under-hood fuse/relay box. Is the harness OK? YES -Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/charging-system/#charging-system) ), then go to step 9. NO -Repair open in the wire between the alternator and the under-hood fuse/relay box, then go to step 9.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine.
Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BB indicated? YES -Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P16BC: Alternator FR Terminal Circuit/ IGP Circuit Low Voltage ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 94

Scheme 94: DTC P16BC: Alternator FR Terminal Circuit/ IGP Circuit Low Voltage ('06-08 models)

Scheme 95

Scheme 96

Scheme 97

Check for poor connections or loose terminals at the alternator 4P connector. Are the connections and terminals OK? YES -Go to step 2. NO -Repair the connections or terminals, then go to step 20 .
Check the alternator mounting surface for corrosion. Is the mounting surface corroded? YES -Remove the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/charging-system/#charging-system) ). Clean all mounting surface and reinstall the alternator, then go to step 20 . NO -Go to step 3.
Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine.
Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BC indicated? YES -Go to step 9. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator.
Turn the ignition switch OFF.
Disconnect the alternator 4P connector.
Turn the ignition switch ON (II).
Measure voltage between alternator 4P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 13. NO -Repair open in the wire between the alternator (IG1 line) and the No. 18 ACG (15 A) fuse in the under-dash fuse/relay box, then go to step 19 .
Measure voltage between alternator 4P connector terminal No. 4 and body ground. Is there about 5 V? YES -Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/charging-system/#charging-system) ), then go to step 19 . NO -Go to step 14.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector B (24P).
Connect alternator 4P connector terminal No. 4 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal B13 and body ground. Is there continuity? YES -Go to step 28 . NO -Repair open in the wire between the ECM/PCM (B13) and the alternator, then go to step 20 .
Turn the ignition switch OFF.
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine.
Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BC indicated? YES -Check for poor connections or loose terminals at the alternator and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine.
Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BC indicated? YES -Check for poor connections or loose terminals at the alternator and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 30 . If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P2183: ECT Sensor 2 Circuit Range/ Performance Problem ('06-08 models)

Check for poor connections or loose terminals at ECT sensor 1 and ECT sensor 2. Are the connections and terminals OK? YES -Go to step 2. NO -Repair the connections or terminals, then go to step 27 .
Turn the ignition switch ON (II).
Check for Temporary DTCs or DTCs with the HDS. Are DTC P1116 and P2183 indicated at the same time? YES -Go to step 15 . NO -Go to step 4.
Start the engine, and let it idle for 10 minutes.
Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 131°F (55°C) or less indicated? YES -Replace ECT sensor 2 (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 27 . NO -Go to step 6.
Turn the ignition switch OFF.
Drain the coolant (see «COOLANT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ).
Remove ECT sensor 2 (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Allow ECT sensor 2 to cool to the ambient temperature.
Note the ambient temperature.
Connect ECT sensor 2 to its 2P connector, but do not install it on the engine.
Turn the ignition switch ON (II).
Note the value of ECT SENSOR 2 quickly in the DATA LIST with the HDS.
Compare the value of ECT SENSOR 2 and the ambient temperature. Does ECT SENSOR 2 differ 5.4°F (3°C) or more? YES -Replace ECT sensor 2 (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 27 . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM.
Start the engine, and let it idle for 10 minutes.
Check ECT SENSOR 1 in the DATA LIST with the HDS. Is about 115°F (46°C) or less indicated? YES -Replace ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 27 . NO -Go to step 17.
Let the engine idle for 10 minutes.
Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 131°F (55°C) or less indicated? YES -Replace ECT sensor 2 (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 27 . NO -Go to step 19.
Turn the ignition switch OFF.
Drain the coolant (see «COOLANT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ).
Remove ECT sensor 1 (see «ECT SENSOR/ECT SENSOR 1 REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ) and ECT sensor 2 (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Allow the sensors to cool to the ambient temperature.
Note the ambient temperature.
Connect ECT sensor 1 to its 2P connector, and ECT sensor 2 to its 2P connector, but do not install them into the engine or the radiator.
Note the value of ECT SENSOR 1 and ECT SENSOR 2 quickly in the DATA LIST with the HDS.
Compare the value of ECT SENSOR 1 and the ambient temperature, and the value of ECT SENSOR 2 and the ambient temperature individually. Does one of the sensors differ more than 5.4°F (3°C) from the ambient temperature? YES -Replace the sensor that differed more than 5.4°F (3°C) from the ambient temperature, then go to step 27. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2183 indicated? YES -Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P2184: ECT Sensor 2 Circuit Low Voltage ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 98

Scheme 98: DTC P2184: ECT Sensor 2 Circuit Low Voltage ('06-08 models)

Turn the ignition switch ON (II).
Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 2 and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the ECT sensor 2 2P connector.
Turn the ignition switch ON (II).
Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about 356°F (180°C) or more, or 0.08 V or less indicated? YES -Go to step 7. NO -Go to step 11 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECT sensor 2 2P connector terminal No. 1 and body ground. Is there continuity? YES -Repair short in the wire between ECT sensor 2 and the ECM/PCM (E1), then go to step 13 . NO -Go to step 18 .
Turn the ignition switch OFF.
Replace ECT sensor 2 (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2184 indicated? YES -Check for poor connections or loose terminals at ECT sensor 2 and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2184 indicated? YES -Check for poor connections or loose terminals at ECT sensor 2 and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P2185: ECT Sensor 2 Circuit High Voltage ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 99

Scheme 99: DTC P2185: ECT Sensor 2 Circuit High Voltage ('06-08 models)

Scheme 100

Scheme 101

Scheme 102

Scheme 103

Turn the ignition switch ON (II).
Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about -40°F (-40°C) or less, or 4.90 V or more indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 2 and the ECM/PCM.
Turn the ignition switch OFF.
Disconnect the ECT sensor 2 2P connector.
Connect ECT sensor 2 2P connector terminals No. 1 and No. 2 with a jumper wire.
Turn the ignition switch ON (II).
Check ECT SENSOR 2 in the DATA LIST with the HDS. Is about -40°F (-40°C) or less, or 4.90 V or more indicated? YES -Go to step 8. NO -Go to step 18 .
Turn the ignition switch OFF.
Remove the jumper wire from the ECT sensor 2 2P connector.
Turn the ignition switch ON (II).
Measure voltage between ECT sensor 2 2P connector terminal No. 1 and body ground. Is there about 5 V? YES -Go to step 12. NO -Go to step 17 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Connect ECT sensor 2 2P connector terminal No. 2 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal E4 and body ground. Is there continuity? YES -Go to step 26 . NO -Repair open in the wire between the ECM/PCM (E4) and ECT sensor 2, then go to step 20 .
Measure voltage between ECM/PCM connector terminal E1 and body ground. Is there about 5 V? YES -Repair open in the wire between the ECM/PCM (E1) and ECT sensor 2, then go to step 20 . NO -Go to step 25 .
Turn the ignition switch OFF.
Replace ECT sensor 2 (see «MAP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2185 indicated? YES -Check for poor connections or loose terminals at ECT sensor 2 and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Turn the ignition switch OFF.
Reconnect all connectors.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2185 indicated? YES -Check for poor connections or loose terminals at ECT sensor 2 and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P2195: A/F Sensor (Sensor 1) Signal Stuck Lean

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If the vehicle was out of fuel and the engine stalled before this DTC was stored, refuel and clear the DTC with the HDS. If DTC P2101, P2108, P2118, P2135, P2138, P2176, U0107, or a combination of P2122 and P2127, P2122, and P2138, or P2127 and P2138 is stored at the same time, troubleshoot them first, then recheck for DTC P2195 ('06-08 models).

Check the installation of the A/F sensor (Sensor 1). Is the A/F sensor loose or disconnected from the exhaust pipe? YES -Go to step 6 . NO -Go to step 2.
Turn the ignition switch ON (II).
Clear the DTC with the DTC.
Start the engine, and let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2195 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 13 . NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Turn the ignition switch OFF.
Reinstall the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2195 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . NO -Go to step 12.
Monitor the OBD STATUS for DTC P2195 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 11 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine, and let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2195 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 14 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 16.
Monitor the OBD STATUS for DTC P2195 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 15 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 14 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P2227: BARO Sensor Circuit Range/ Performance Problem

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ). If DTC P0107, P0108, P1128, and/or P1129 are stored at the same time as DTC P2227, troubleshoot those DTCs first, then recheck for DTC P2227. Before starting this troubleshooting check for poor connections or blockage at the intake air duct and air cleaner.

Turn the ignition switch ON (II), and wait 2 seconds.
Check the BARO SENSOR in the DATA LIST with the HDS. Is about 101 kPa (29.9 in.Hg, 760 mmHg), or about 2.9 V at sea level indicated? YES -Go to step 3. NO -Go to step 7 .
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 176°F (80°C) A/T in D position (M/T in 4th gear) REL TP SENSOR between 12 deg and 20 deg for 3 seconds
Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 7. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. If the screen indicates NOT COMPLETED, go to step 4 and recheck.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 176°F (80°C) A/T in D position (M/T in 4th gear) REL TP SENSOR between 12-20 degrees for 3 seconds
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2227 indicated? YES -Check for poor connections or loose terminals at the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 8 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 11.
Monitor the OBD STATUS for DTC P2227 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 10 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 8 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, go to step 8 .

DTC P2228: BARO Sensor Circuit Low Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Check the BARO SENSOR in the DATA LIST with the HDS. Is about 53 kPa (15.6 in.Hg, 397 mmHg), or 1.58 V or less indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2228 indicated? YES -Check for poor connections or loose terminals at the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P2229: BARO Sensor Circuit High Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Check the BARO SENSOR in the DATA LIST with the HDS. Is about 160 kPa (47.2 in.Hg, 1,200 mmHg), or 4.5 V or higher indicated? YES -Go to step 3. NO -Intermittent failure, the system is OK at this time.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2229 indicated? YES -Check for poor connections or loose terminals at the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P2238: A/F Sensor (Sensor 1) AFS+ Circuit Low Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 104

Scheme 104: DTC P2238: A/F Sensor (Sensor 1) AFS+ Circuit Low Voltage

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2238 indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the A/F sensor (Sensor 1) 4P connector.
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A31 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A31) and the A/F sensor (Sensor 1), then go to step 10 . NO -Go to step 9.
Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2238 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the connector and terminal fits are OK, go to step 16 . NO -Go to step 15.
Monitor the OBD STATUS for DTC P2238 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 14 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine, and let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2238 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 17 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 19.
Monitor the OBD STATUS for DTC P2238 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 18 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, go to step 1 . If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 17 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P2252: A/F Sensor (Sensor 1) AFS-Circuit Low Voltage

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 105

Scheme 105: DTC P2252: A/F Sensor (Sensor 1) AFS-Circuit Low Voltage

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2252 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the A/F sensor (Sensor 1) 4P connector.
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A28 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A28) and the A/F sensor (Sensor 1), then go to step 11 . NO -Go to step 10.
Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2252 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the connector and terminal fits are OK, go to step 17 . NO -Go to step 16.
Monitor the OBD STATUS for DTC P2252 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 15 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Start the engine, and let it idle.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2252 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 18 . If the ECM/PCM was substituted, go to step 1 . NO -Go to step 20.
Monitor the OBD STATUS for DTC P2252 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs were indicated in step 19 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, go to step 1 . If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then go to step 18 . If the ECM/PCM was substituted, go to step 1 . If the screen indicates NOT COMPLETED, keep idling until a result comes on.

DTC P2270: Secondary HO2S (Sensor 2) Circuit Signal Stuck Lean ('05-08 models); DTC P2271: Secondary HO2S (Sensor 2) Circuit Signal Stuck Rich ('05-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine, and let it idle without load (in Park or neutral) until the radiator fan comes on.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('05 model), Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) Vehicle speed above 35 mph (56 km/h) Drive 25 seconds or more
Monitor the OBD STATUS for DTC P2270 or P2271 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 6. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 3 and recheck.
Turn the ignition switch OFF.
Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('05 model), Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) Vehicle speed above 35 mph (56 km/h) Drive 25 seconds or more
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2270 or P2271 indicated? YES -Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . NO -Go to step 14.
Monitor the OBD STATUS for DTC P2270 or P2271 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 13 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 11 .

DTC P2610: ECM/PCM Ignition Off Internal Timer Malfunction ('06-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2610 indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2610 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC P2A00: A/F Sensor (Sensor 1) Circuit Range/Performance Problem

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) A/T in D position (M/T in 3rd gear) Vehicle speed between 25-55 mph (40 - 88 km/h) for 5 minutes Drive at a steady speed between 55-75 mph (88-120 km/h) for 10 seconds, then decelerate (with throttle fully closed) for 4 seconds.
Monitor the OBD STATUS for DTC P2A00 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 6. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 3 and recheck.
Turn the ignition switch OFF.
Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
Test-drive under these conditions: Engine coolant temperature (ECT SENSOR) ('04-05 models). Engine coolant temperature (ECT SENSOR 1) ('06-08 models) above 158°F (70°C) A/T in D position (M/T in 3rd gear) Vehicle speed between 25-55 mph (40 - 88 km/h) for 5 minutes Drive at a steady speed between 55-75 mph (88-120 km/h) for 10 seconds, then decelerate (with throttle fully closed) for 4 seconds.
Check for Temporary DTCs or DTCs with the HDS. Is DTC P2A00 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . NO -Go to step 14.
Monitor the OBD STATUS for DTC P2A00 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 13 , go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 11 .

DTC U0073: F-CAN Malfunction (BUS-OFF) ('04-06 models); DTC U0155: F-CAN Malfunction (ECM/PCM-Gauge Control Module) ('04-06 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 106

Scheme 106: DTC U0073: F-CAN Malfunction (BUS-OFF) ('04-06 models); DTC U0155: F-CAN Malfunction (ECM/PCM-Gauge

Scheme 107

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Check for Temporary DTCs or DTCs with the HDS. Is DTC U0073 and/or U0155 indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the gauge control module, the VSA modulator-control unit, the navigation unit, and the ECM/PCM.
Check for DTCs in the DTCs MENU in the Body Electrical system with the HDS. Is DTC B1168, B1169, and/or B1178 indicated? YES -Go to step 5. NO -Perform the gauge control module input test (see «GAUGE CONTROL MODULE INPUT TEST»(/acura/tsx/i-2003-2008/remont/communication-devices/#multiplex-integrated-control-system) ).
Turn the ignition switch OFF.
Remove the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ).
Disconnect gauge control module connector B (18P).
Disconnect the VSA modulator-control unit 47P connector (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
If equipped with the navigation system, disconnect the navigation unit 20P connector (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-293855-S01382320362008080900000) ).
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminals E11, E24, and body ground individually. Is there continuity? YES -Repair short in the wire between the gauge control module, the VSA modulator-control unit, the navigation unit, and the ECM/PCM (E11 (E24)*), then go to step 17 . NO -Go to step 13. *: CANL line
Check for continuity between ECM/PCM connector terminals E11 and E24. Is there continuity? YES -Repair short in the wires between ECM/PCM E11 (CANH line) and E24 (CANL line), then go to step 17 . NO -Go to step 14.
Check for continuity between ECM/PCM connector terminal El 1 and these connector terminals: CONNECTOR TERMINALS REFERENCE Connector Terminal Gauge control module connector B (18P) No. 12 (WHT) VSA modulator-control unit 47P No. 14 (WHT) Navigation unit 20P No. 8 (WHT) Is there continuity between the ECM/PCM terminal and each of the terminals in the chart? YES -Go to step 15. NO -Repair open in the wire between the ECM/PCM and the appropriate connector, then go to step 17 .
Check for continuity between ECM/PCM connector terminal E24 and these connector terminals: CONNECTOR TERMINALS REFERENCE Connector Terminal Gauge control module connector B (18P) No. 13 (RED) VSA modulator-control unit 47P No. 30 (RED) Navigation unit 20P No. 18 (RED) Is there continuity between the ECM/PCM terminal and each of the terminals in the chart? YES -Go to step 16. NO -Repair open in the wire between the ECM/PCM and the appropriate connector, then go to step 17 .
Using the following chart, select the row that most closely represents the combination of DTCs retrieved from the PGM-FI, VSA, and Body Electrical systems: Check connections at the control module indicated in the last column. If all connections are OK, substitute a known-good control module, check for DTCs with the HDS. BODY ELECTRICAL AND CONTROL MODULE REFERENCE PGM-FI VSA Body Electrical Control module U0155 86-1 B1168 Gauge B1169 Control B1178 Module U0073 68-1 B1168 ECM/PCM U0122 86-1 B1169 U0155 B1178 U0073 68-1 B1168 VSA modulator-control unit U0122 U0155 86-1 B1178 Are the DTCs still indicated? YES -Substitute the remaining control modules, one at time, until the DTCs are no longer present, then replace the control module that made the DTCs go away. After replacing the faulty control module, go to step 17. NO -Replace the faulty control module, then go to step 17.
Reconnect all the connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC U0073 and/or U0155 indicated? YES -Check for poor connections or loose terminals at the gauge control module, the VSA modulator-control unit, the navigation unit, and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC U0073: F-CAN Malfunction (BUS-OFF) ('07-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Check for Temporary DTCs or DTCs with the HDS. Is DTC U0073 indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ).
Turn the ignition switch ON (II).
Check for Temporary DTCs or DTCs with the HDS. Is DTC P0073 indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC U0122: F-CAN Malfunction (ECM/PCM-VSA Modulator-Control Unit)

Scheme 108

Scheme 108: DTC U0122: F-CAN Malfunction (ECM/PCM-VSA Modulator-Control Unit)

Scheme 109

Scheme 110

Scheme 111

Scheme 112

Scheme 113

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Check for Temporary DTCs or DTCs with the HDS. Is DTC U0122 indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the VSA modulator-control unit and the ECM/PCM.
Check for DTCs in the DTCs MENU with the HDS. Is VSA DTC 86 indicated? YES -Go to step 5. NO -Go to step 13 .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the VSA modulator-control unit 47P connector (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
Disconnect ECM/PCM connector E (31P).
Connect VSA modulator-control unit 47P connector terminal No. 14 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal E11 and body ground. Is there continuity? YES -Go to step 11. NO -Repair open in the wire between the ECM/PCM (E11) and the VSA modulator-control unit (No. 14), then go to step 20 .
Connect VSA modulator-control unit 47P connector terminal No. 30 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal E24 and body ground. Is there continuity? YES -Substitute a known-good VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), then go to step 20 and recheck. If DTC U0122 is not indicated, replace the original VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), then go to step 20 . NO -Repair open in the wire between the ECM/PCM (E24) and the VSA modulator-control unit (No. 30), then go to step 20 .
Turn the ignition switch OFF.
Check for poor connections or loose terminals at the VSA modulator-control unit 47P connector. Are the connections and terminals OK? YES -Go to step 15. NO -Repair the connections or terminals, then go to step 20 .
Disconnect the VSA modulator-control unit 47P connector.
Turn the ignition switch ON (II).
Measure voltage between VSA modulator-control unit 47P connector terminal No. 38 and body ground. Is there battery voltage? YES -Go to step 18. NO -Check the No. 18 ACG (15 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 18 ACG (15 A) fuse and the VSA modulator-control unit, then go to step 20 .
Turn the ignition switch OFF.
Check for continuity between VSA modulator-control unit 47P connector terminal No. 32 and body ground. Is there continuity? YES -Substitute a known-good VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), then go to step 20 and recheck. If no DTCs are indicated, replace the original VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ), then go to step 20. NO -Repair open in the wire between the VSA modulator-control unit and G203, then go to step 20.
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC U0122 indicated? YES -Check for poor connections or loose terminals at the VSA modulator-control unit and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

DTC U0155: F-CAN Malfunction (ECM/PCM-Gauge Control Module) ('07-08 models)

Note. Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see GENERAL TROUBLESHOOTING INFORMATION ).

Scheme 114

Scheme 114: DTC U0155: F-CAN Malfunction (ECM/PCM-Gauge Control Module) ('07-08 models)

Scheme 115

Scheme 116

Scheme 117

Turn the ignition switch ON (II).
Clear the DTC with the HDS.
Check for Temporary DTCs or DTCs with the HDS. Is DTC U0155 indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the gauge control module and the ECM/PCM.
Check for body electrical DTCs in the DTCs MENU with the HDS. Is DTC B1168, B1169, and/or B1178 indicated? YES -Go to step 5. NO -Do the gauge control module input test (see «GAUGE CONTROL MODULE INPUT TEST»(/acura/tsx/i-2003-2008/remont/communication-devices/#multiplex-integrated-control-system) ).
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Remove the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ).
Disconnect gauge control module connector B (18P).
Disconnect ECM/PCM connector E (31P).
Connect gauge control module connector B (18P) terminal No. 12 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal E11 and body ground. Is there continuity? YES -Go to step 12. NO -Repair open in the wire between the ECM/PCM (El 1) and the gauge control module, then go to step 14 .
Connect gauge control module connector B (18P) terminal No. 13 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal E24 and body ground. Is there continuity? YES -Substitute a known-good gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ), then go to step 14 and recheck. If DTC U0155 is not indicated, replace the original gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ), then go to step 14. NO -Repair open in the wire between the ECM/PCM (E24) and the gauge control module, then go to step 14.
Reconnect all connectors.
Turn the ignition switch ON (II).
Reset the ECM/PCM with the HDS.
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC U0155 indicated? YES -Check for poor connections or loose terminals at the gauge control module and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

F-CAN Circuit Troubleshooting

Note. Information marked with an asterisk C) applies to the CANL line.

Scheme 118

Scheme 118: '07-08 models

Scheme 119

Scheme 120

Scheme 121

Scheme 122

Scheme 123

Scheme 124

Scheme 125

Scheme 126

Scheme 127

Scheme 128

Scheme 129

Scheme 130

Scheme 131

Scheme 132

Scheme 133

Scheme 134

Scheme 135

Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P), then disconnect the HDS.
Measure resistance between ECM/PCM connector terminals El1 and E24. Is there about 108-132 ohms? YES -Go to step 32 . NO -Go to step 5.
Disconnect gauge control module connector B (18P) (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ).
Disconnect the VSA modulator-control unit 47P connector (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
Disconnect the TPMS control unit 20P connector (see «TPMS CONTROL UNIT REPLACEMENT»(ref-293856-S37862555322008080900000) ).
With navigation system: Disconnect navigation unit connector A (20P) (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-293855-S01382320362008080900000) ).
Check for continuity between ECM/PCM connector terminals E11 and E24. Is there continuity? YES -Repair short in the wires between ECM/PCM connector terminals E11 and E24*. NO -Go to step 10.
Connect ECM/PCM connector terminal E11 to body ground with a jumper wire.
Check for continuity between gauge control module connector B (18P) terminal No. 12 and body ground. Is there continuity? YES -Go to step 12. NO -Repair open in the wire between the ECM/PCM (E11) and the gauge control module.
Check for continuity between VSA modulator-control unit 47P connector terminal No. Hand body ground. Is there continuity? YES -Go to step 13. NO -Repair open in the wire between the ECM/PCM (E11) and the VSA modulator-control unit.
Check for continuity between TPMS control unit 20P connector terminal No. 1 and body ground. Is there continuity? YES - With navigation system: Go to step 14. Without navigation system: Go to step 15 . NO -Repair open in the wire between the ECM/PCM (E11) and the TPMS control unit.
Check for continuity between navigation unit connector A (20P) terminal No. 8 and body ground. Is there continuity? YES -Go to step 15. NO -Repair open in the wire between the ECM/PCM (E11) and the navigation control unit.
Remove the jumper wire from ECM/PCM connector E(31P).
Connect ECM/PCM connector terminal E24 to body ground with a jumper wire.
Check for continuity between gauge control module connector B (18P) terminal No. 13 and body ground. Is there continuity? YES -Go to step 18. NO -Repair open in the wire between the ECM/PCM (E24) and the gauge control module.
Check for continuity between VSA modulator-control unit 47P connector terminal No. 30 and body ground. Is there continuity? YES -Go to step 19. NO -Repair open in the wire between the ECM/PCM (E24) and the VSA modulator-control unit.
Check for continuity between TPMS control unit 20P connector terminal No. 11 and body ground. Is there continuity? YES - With navigation system: Go to step 20. Without navigation system: Go to step 21 . NO -Repair open in the wire between the ECM/PCM (E24) and the TPMS control unit.
Check for continuity between navigation unit connector A (20P) terminal No. 18 and body ground. Is there continuity? YES -Go to step 21. NO -Repair open in the wire between the ECM/PCM (E24) and the navigation unit.
Reconnect gauge control module connector B (18P).
Measure resistance between ECM/PCM connector terminals E11 and E24. Is there about 2.34-2.86 kohms ? YES -Go to step 23. NO -Substitute a known-good gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ). If the HDS identifies the vehicle, replace the original gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ).
Disconnect gauge control module connector B (18P) (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ).
Reconnect the VSA modulator-control unit 47P connector.
Measure resistance between ECM/PCM connector terminals El 1 and E24. Is there about 112 - 136 ohms? YES -Go to step 26. NO -Substitute a known-good VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ). If the HDS identifies the vehicle, replace the original VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
Disconnect the VSA modulator-control unit 47P connector (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
Reconnect the TPMS control unit 20P connector.
Measure resistance between ECM/PCM connector terminals E11 and E24. Is there about 2.34-2.86 kohms? YES - With navigation system: Go to step 29. Without navigation system: Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Substitute a known-good TPMS control unit (see «TPMS CONTROL UNIT REPLACEMENT»(ref-293856-S37862555322008080900000) ). If the HDS identifies the vehicle, replace the original TPMS control unit (see «TPMS CONTROL UNIT REPLACEMENT»(ref-293856-S37862555322008080900000) ).
Disconnect the TPMS control unit 20P connector (see «TPMS CONTROL UNIT REPLACEMENT»(ref-293856-S37862555322008080900000) ).
Reconnect navigation unit connector A (20P).
Measure resistance between ECM/PCM connector terminals E11 and E24. Is there about 2.34-2.86 kohms? YES -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Substitute a known-good navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-293855-S01382320362008080900000) ). If the HDS identifies the vehicle, replace the original navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-293855-S01382320362008080900000) ).
Disconnect gauge control module connector B (18P) (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ).
Disconnect the VSA modulator-control unit 47P connector (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
Disconnect the TPMS control unit 20P connector (see «TPMS CONTROL UNIT REPLACEMENT»(ref-293856-S37862555322008080900000) ).
With navigation system: Disconnect navigation unit connector A (20P) (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-293855-S01382320362008080900000) ).
Check for continuity between ECM/PCM connector terminal E11 and body ground. Is there continuity? YES -Repair short in the wire between ECM/PCM connector terminal E11 and the gauge control module, the VSA modulator-control unit, the TPMS control unit, the navigation unit, or the DLC. NO -Go to step 37.
Check for continuity between ECM/PCM connector terminal E24 and body ground. Is there continuity? YES -Repair short in the wire between ECM/PCM connector terminal E24 and the gauge control module, the VSA modulator-control unit, the TPMS control unit, the navigation unit, or the DLC. NO -Go to step 38.
Reconnect all connectors.
Connect the HDS to the DLC (see «HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-use-the-hds-honda) ).
Disconnect gauge control module connector B (18P) (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ).
Turn the ignition switch ON (II), and read the HDS. Does the HDS identify the vehicle? YES -Replace the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ). NO -Go to step 42.
Turn the ignition switch OFF.
Reconnect gauge control module connector B (18P).
Disconnect the VSA modulator-control unit 47P connector (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ).
Turn the ignition switch ON (II), and read the HDS. Does the HDS identify the vehicle? YES -Replace the VSA modulator-control unit (see «VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system__vsa-modulator-control-unit-removal-and-installation) ). NO -Go to step 46.
Turn the ignition switch OFF. 47.
Disconnect the TPMS control unit 20P connector (see «TPMS CONTROL UNIT REPLACEMENT»(ref-293856-S37862555322008080900000) ).
Turn the ignition switch ON (II), and read the HDS. Does the HDS identify the vehicle? YES -Replace the TPMS control unit (see «TPMS CONTROL UNIT REPLACEMENT»(ref-293856-S37862555322008080900000) ). NO - With navigation system: Go to step 49. Without navigation system: Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch OFF.
Reconnect the TPMS control unit 20P connector.
Disconnect navigation unit connector A (20P) (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-293855-S01382320362008080900000) ).
Turn the ignition switch ON (II), and read the HDS. Does the HDS identify the vehicle? YES -Replace the navigation unit (see «NAVIGATION UNIT REMOVAL/INSTALLATION»(ref-293855-S01382320362008080900000) ). NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).

MIL Circuit Troubleshooting

Note. Information marked with an asterisk (*) applies to the '06 model.

Scheme 136

Scheme 136: '04-06 models

Scheme 137

Scheme 138

Scheme 139

Scheme 140

Scheme 141

Scheme 142

Scheme 143

Scheme 144

Scheme 145

Scheme 146

Scheme 147

Scheme 148

Scheme 149

Scheme 150

Scheme 151

Scheme 152

Scheme 153

Scheme 154

Scheme 155

Scheme 156

Scheme 157

Scheme 158

Scheme 159

Scheme 160

Scheme 161

Scheme 162

Scheme 163

Scheme 164

Scheme 165

Turn the ignition switch ON (II).
Do the gauge self-diagnostic procedure (see «SELF-DIAGNOSTIC FUNCTION»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__self-diagnostic-function) ). Does the MIL indicator flash? YES -Go to step 3. NO -Substitute a known-good gauge assembly (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ), and recheck. If the MIL circuit is OK, replace the original gauge control module.
Turn the ignition switch OFF.
Turn the ignition switch ON (II), and watch the MIL. Does the MIL stay off? YES -Go to step 17 . NO -Go to step 5.
Turn the ignition switch OFF.
Turn the ignition switch ON (II), wait 20 seconds, and watch the MIL. Does the MIL stay on or flash more than 5 times? YES -Go to step 7. NO -The MIL circuit is OK.
Turn the ignition switch OFF.
Connect the HDS (see «HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-use-the-hds-honda) ).
Turn the ignition switch ON (II), and read the HDS. Does the HDS communicate with the ECM/PCM? YES -Go to step 10. NO -Go to "DLC Circuit Troubleshooting" (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__dlc-circuit-troubleshooting) ). If no problem is found in the DLC troubleshooting, go to step 21 .
Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES -Go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -Go to step 11.
Check the MIL in the DATA LIST with the HDS. Is ON indicated? YES -Go to step 12. NO -Substitute a known-good gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ), and recheck. If the MIL circuit is OK, replace the original gauge control module.
Check the SCS in the DATA LIST with the HDS. Is a short indicated? YES -Go to step 13. NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E29 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (E29) and the DLC. NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Try to start the engine. Did the engine not start, or does it idle rough? YES -Go to step 22 . NO -Go to step 18.
Turn the ignition switch OFF.
Connect the HDS (see «HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-use-the-hds-honda) ).
Turn the ignition switch ON (II), and read the HDS. Does the HDS communicate with the ECM/PCM? YES -Go to step 21. NO -Go to "DLC Circuit Troubleshooting" (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__dlc-circuit-troubleshooting) ).
Check for Temporary DTCs or DTCs with the HDS. Is DTC U0073 and/or U0155 indicated? YES -Go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch OFF.
Inspect the No. 23+B IG1 MAIN (50 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES -Repair open in the wire between the No. 23 +B IG1 MAIN (50 A) fuse and the ignition switch. If the wire is OK, go to step 24. NO -Repair short in the wire between No. 23 +B IG1 MAIN (50 A) fuse and the under-dash fuse/relay box. Also replace the No. 23 +B IG1 MAIN (50 A) fuse.
Inspect the No. 8 FI ECU (ECM/PCM) (15 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES -Go to step 31 . NO -Go to step 25.
Remove the blown No. 8 FI ECU (ECM/PCM) (15 A) fuse from the under-dash fuse/relay box.
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box.
Check for continuity between body ground and PGM-FI main relay 1 (FI MAIN) 4P connector terminals No. 2 and No. 4 individually. Is there continuity? YES -Repair short in the wire between the No. 8 FI ECU (ECM/PCM) (15 A) fuse and PGM-FI main relay 1 (FI MAIN). Also replace the No. 8 FI ECU (ECM/PCM) (15 A) fuse. NO -Go to step 28.
Disconnect each of the components or connectors, one at a time, and check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and body ground. PGM-FI main relay 2 (FUEL PUMP) A/F sensor relay (LAF) Throttle actuator control module relay ECM/PCM connector A (31P) Each injector 2P connector Camshaft position (CMP) sensor B 3P connector Crankshaft position (CKP) sensor 3P connector Does continuity go away when one of the above components is disconnected? YES -Replace the component that made the short to body ground go away when disconnected. If the item is the ECM/PCM, Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). Also replace the No. 8 FI ECU (ECM/PCM) (15 A) fuse. NO -Go to step 29.
Disconnect the connectors from these components: PGM-FI main relay 2 (FUEL PUMP) A/F sensor relay (LAF) Throttle actuator control module relay ECM/PCM connector A (31 P) Injectors Camshaft position (CMP) sensor B Crankshaft position (CKP) sensor
Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and body ground. Is there continuity? YES -Repair short in the wire between PGM-FI main relay 1 (FI MAIN) and each item. Also replace the No. 8 FI ECU (ECM/PCM) (15 A) fuse. NO -Replace PGM-FI main relay 1 (FI MAIN). Also replace the No. 8 FI ECU (ECM/PCM) (15 A) fuse.
Inspect the No. 19 FUEL PUMP (15 A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES -Go to step 44 . NO -Go to step 32.
Remove the blown No. 19 FUEL PUMP (15 A) fuse from the under-dash fuse/relay box.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E9 and body ground. Is there continuity? YES -Go to step 36. NO -Replace the No. 19 FUEL PUMP (15 A) fuse, and update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 2 (FUEL PUMP) (A) from the under-dash fuse/relay box.
Check for continuity between ECM/PCM connector terminal E9 and body ground. Is there continuity? YES -Repair short in the wire between the No. 19 FUEL PUMP (15 A) fuse and the ECM/PCM (E9), or between the No. 19 FUEL PUMP (15 A) fuse and PGM-FI main relay 2 (FUEL PUMP), or between the No. 19 FUEL PUMP (15 A) fuse and the immobilizer control unit. Also replace the No. 19 FUEL PUMP (15A) fuse. NO -Go to step 38.
Remove the trunk floor trim panel (see «TRIM REMOVAL/INSTALLATION - TRUNK AREA»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-trunk-area) ).
Remove the access panel from the floor. (see «REMOVAL»(/acura/tsx/i-2003-2008/remont/fuel-system/#fuel-supply-system)
Disconnect the fuel tank unit 5P connector. (see «FUEL TANK UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/fuel-system/#fuel-supply-system__fuel-tank-unit-removal-and-installation) ).
Check for continuity between fuel pump 5P connector terminal No. 5 and body ground. Is there continuity? YES -Repair short in the wire between the fuel pump and PGM-FI main relay 2 (FUEL PUMP). Also replace the No. 19 FUEL PUMP (15 A) fuse. NO -Go to step 42.
Reinstall PGM-FI main relay 2 (FUEL PUMP) (A).
Check for continuity between fuel pump 5P connector terminal No. 5 and body ground. Is there continuity? YES -Replace PGM-FI main relay 2 (FUEL PUMP). Also replace the No. 19 FUEL PUMP (15 A) fuse. NO -Check the fuel pump, and replace it if necessary. Also replace the No. 19 FUEL PUMP (15 A) fuse.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Turn the ignition switch ON (II).
Measure voltage between ECM/PCM connector terminal E9 and body ground. Is there battery voltage? YES -Go to step 48. NO -Repair open in the wire between the No. 19 FUEL PUMP (15 A) fuse and the ECM/PCM (E9).
Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage? YES -Go to step 53 . NO -Go to step 49.
Turn the ignition switch OFF.
Remove the left the kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box.
Measure voltage between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 4 and body ground. Is there battery voltage? YES -Go to step 52. NO -Repair open in the wire between the No. 8 FI ECU (ECM/PCM) (15 A) fuse and PGM-FI main relay 1 (FI MAIN).
Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 3 and ECM/PCM connector terminal E7. Is there continuity? YES -Test PGM-FI main relay 1 (FI MAIN) (see «POWER RELAY TEST»(/acura/tsx/i-2003-2008/remont/body-electrical/#relays__power-relay-test) ). If the relay is OK, update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and the ECM/PCM (E7).
Reconnect ECM/PCM connector E (31P).
Turn the ignition switch ON (II).
Measure voltage between body ground and ECM/PCM connector terminals A2 and A3 individually. Is there battery voltage? YES -Go to step 62 . NO -Go to step 56.
Turn the ignition switch OFF.
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box.
Turn the ignition switch ON (II).
Measure voltage between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 2 and body ground. Is there battery voltage? YES -Go to step 60. NO -Repair open in the wire between the No. 8 FI ECU (ECM/PCM) (15 A) fuse and PGM-FI main relay 1 (FIMAIN).
Turn the ignition switch OFF.
Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and ECM/PCM connector terminals A2 and A3 individually. Is there continuity? YES -Replace PGM-FI main relay 1 (FI MAIN). NO -Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and the ECM/PCM (A2, A3).
Measure voltage between body ground and ECM/PCM connector terminals A4, A5, A8, and A9 individually. Is there more than 0.2 V? YES -Repair open in the wire(s) that had more than 0.2 V between G101 and the ECM/PCM (A4, A5, A8, A9). NO -Go to step 63.
Measure voltage between body ground and ECM/PCM connector terminal A21. Is there about 5V? YES -Go to step 71 . NO -Go to step 64.
Turn the ignition switch OFF.
Disconnect the connector from each of these sensors, one at a time, and measure voltage between body ground and ECM/PCM connector terminal A21 with the ignition switch ON (II). Manifold absolute pressure (MAP) sensor Accelerator pedal position (APP) sensor Input shaft (mainshaft) speed sensor (A/T) Is there about 5 V? YES -Replace the sensor that restored 5 V when disconnected. NO -Go to step 66.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the connectors from these sensors: Manifold absolute pressure (MAP) sensor Accelerator pedal position (APP) sensor Input shaft (mainshaft) speed sensor (A/T)
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A21 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A21) and the MAP sensor, the APP sensor, or the input shaft (mainshaft) speed sensor (A/T). NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Measure voltage between body ground and ECM/PCM connector terminal A20. Is there about 5 V? YES -Go to step 79 . NO -Go to step 72.
Turn the ignition switch OFF.
Disconnect the connector from each of these sensors, one at a time, and measure voltage between body ground and ECM/PCM connector terminal A20 with the ignition switch ON (II). Accelerator pedal position (APP) sensor Output shaft (countershaft) speed sensor Is there about 5 V? YES -Replace the sensor that restored 5 V when disconnected. NO -Go to step 74.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the connector from these sensors: Accelerator pedal position (APP) sensor Output shaft (countershaft) speed sensor
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A20 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A20) and the APP sensor or the output shaft (countershaft) speed sensor. NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Measure voltage between body ground and ECM/PCM connector terminal E5. Is there about 5 V? YES -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Go to step 80.
Turn the ignition switch OFF.
Disconnect the FTP sensor 3P connector, and measure voltage between body ground and ECM/PCM connector terminal E5 with the ignition switch ON (II). Is there about 5 V? YES -Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#evap-system) ). NO -Go to step 82.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the FTP sensor 3P connector.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E5 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (E5) and the FTP sensor. NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 166

Scheme 166: '07-08 models

Turn the ignition switch ON (II).
Do the gauge self-diagnostic function (see «SELF-DIAGNOSTIC FUNCTION»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__self-diagnostic-function) ). Does the MIL indicator flash? YES -Go to step 3. NO -Substitute a known-good gauge control module, and recheck. If the MIL circuit is OK, replace the original gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ).
Connect the HDS to the DLC (see «HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-use-the-hds-honda) ).
Check the SCS in the DATA LIST with the HDS. Is a short indicated? YES -Go to step 5. NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Turn the ignition switch OFF.
Disconnect ECM/PCM connector E (31P), then disconnect the HDS.
Check for continuity between ECM/PCM connector terminal E29 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A31) and the SRS unit or the DLC. NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).

DLC Circuit Troubleshooting

Note. If the ECM/PCM does not communicate with the HDS, do this troubleshooting procedure. Check that the MIL circuit is normal, then do this troubleshooting. Information marked with an asterisk (*) applies to the '06 model.

Scheme 167

Scheme 167: '04-06 models

Scheme 168

Scheme 169

Scheme 170

Scheme 171

Scheme 172

Scheme 173

Measure voltage between DLC terminal No. 16 and body ground. Is there battery voltage? YES -Go to step 2. NO -Repair open in the wire between DLC terminal No. 16 and the No. 8 FI ECU (15 A) fuse in the under-hood fuse/relay box.
Measure voltage between DLC terminals No. 4 and No. 16. Is there battery voltage? YES -Go to step 3. NO -Repair open in the wire between DLC terminal No. 4 and body ground (G501).
Measure voltage between DLC terminals No. 5 and No. 16. Is there battery voltage? YES -Go to step 4. NO -Repair open in the wire between the ECM/PCM (E3) and DLC terminal No. 5 (body ground (G503) and DLC terminal No. 5)*.
Turn the ignition switch ON (II).
Measure voltage between DLC terminals No. 5 and No. 7. Is there 8.5 V or more? YES -Go to step 11 . NO -Go to step 6.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between DLC terminal No. 7 and body ground. Is there continuity? YES -Repair short to ground in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check for a DTC with the HDS, then go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -Go to step 10.
Check for continuity between DLC terminal No. 7 and ECM/PCM terminal E23. Is there continuity ? YES -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Repair open in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check for a DTC with the HDS, then go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Turn the ignition switch ON (II).
Measure voltage between DLC terminals No. 5 and No. 7. Is there 0V? YES -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM; '04-05 models (see «ECM/PCM REPLACEMENT»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__ecmpcm-replacement) ), '06 model (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Repair short to power in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check for a DTC with the HDS, then go to the «INDICATED DTC'S TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) .

Note. Make sure the HDS and the DLC cable of the HDS are not defective.

Scheme 174

Scheme 174: '07-08 models

Scheme 175

Scheme 176

Scheme 177

Scheme 178

Scheme 179

Scheme 180

Scheme 181

Scheme 182

Scheme 183

Scheme 184

Scheme 185

Scheme 186

Scheme 187

Scheme 188

Scheme 189

Scheme 190

Scheme 191

Scheme 192

Scheme 193

Scheme 194

Scheme 195

Scheme 196

Scheme 197

Scheme 198

Scheme 199

Scheme 200

Scheme 201

Scheme 202

Scheme 203

Scheme 204

Scheme 205

Scheme 206

Scheme 207

Scheme 208

Scheme 209

Scheme 210

Scheme 211

Turn the ignition switch OFF.
Connect the HDS to the DLC (see «HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-use-the-hds-honda) ). NOTE: Make sure the HDS is properly connected to the DLC.
Turn the ignition switch ON (II), and read the HDS. Does the HDS identify the vehicle? YES -Go to step 4. NO -Go to step 21 .
Check for Temporary DTCs or DTCs in the PGM-FI system with the HDS. Are any Temporary DTCs or DTCs indicated? YES -Go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -Go to step 5.
Turn the ignition switch OFF.
Turn the ignition switch ON (II), and watch the SRS indicator. Does the SRS indicator stay on? YES -Go to the SRS system's general troubleshooting information (see «GENERAL TROUBLESHOOTING INFORMATION»(/acura/tsx/i-2003-2008/remont/airbag/#srs-supplemental-restraint-system) ). NO -Go to step 7.
Turn the ignition switch OFF.
Start the engine, and watch the TPMS indicator. Does the TPMS indicator stay on? YES -Go to the TPMS system's general troubleshooting information (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-293856-S04710123832008080900000) ). NO -Go to step 9.
Turn the ignition switch OFF.
Turn the ignition switch ON (II), and watch the VSA indicator. Does the VSA indicator stay on? YES -Go to the VSA system's general troubleshooting information (see «GENERAL TROUBLESHOOTING INFORMATION»(/acura/tsx/i-2003-2008/remont/anti-locktraction-control/#vsa-vehicle-stability-assist-system) ). NO -Go to step 11.
Turn the ignition switch OFF.
Turn the ignition switch ON (II), and watch the immobilizer indicator. Does the immobilizer indicator stay on or flash? YES -Go to the immobilizer system's troubleshooting (see «'07-08 MODELS»(/acura/tsx/i-2003-2008/remont/door-locks-anti-theft-systems/#immobilizer-system) ). NO -Go to step 13.
Do the gauge self-diagnostic function without the HDS (see «SELF-DIAGNOSTIC FUNCTION»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__self-diagnostic-function) ). Are any indicators flashing? YES -Go to step 14. NO -Troubleshoot the gauge control module (see «GAUGE CONTROL MODULE REPLACEMENT»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__gauge-control-module-replacement) ).
Check for B-CAN system DTCs without the HDS (see «GENERAL TROUBLESHOOTING INFORMATION»(/acura/tsx/i-2003-2008/remont/communication-devices/#multiplex-integrated-control-system) ). Are any B-CAN DTCs indicated? YES -Go to the «INDICATED DTCS TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) . NO -Go to step 15.
Turn the ignition switch OFF.
Disconnect the HDS from the DLC.
Check for continuity between body ground and DLC terminals No. 1 and No. 7 individually. Is there continuity? YES -Go to step 18. NO -Go to step 19 .
Continue to check for continuity between DLC terminals No. 1 and No. 7 and body ground individually, while disconnecting these parts, one at a time: SRS unit connector A (28P) VSA modulator-control unit 47P connector Immobilizer control unit-receiver 7P connector Under-dash fuse/relay box P connector (30P) TPMS control unit 20P connector Does continuity go away when one of the above components is disconnected? YES -Replace the part that caused an open when it was disconnected. NO -Repair short in the wire between the DLC No. 7 (K-line) and the VSA modulator-control unit, the SRS unit, the TPMS control unit, or the under-dash fuse/relay box (multiplex integrated control unit), or DLC No. 1 (DIAG-H line) and the immobilizer control unit-receiver.
Connect DLC terminals No. 1 and No. 7 to body ground with a jumper wire.
Check for continuity between body ground and these connector terminals: UNIT TERMINALS AND DLC TERMINALS REFERENCE Connector Unit Terminal DLC Terminal VSA modulator-control unit 47P No. 11 (BLU) No. 7 (BLU) SRS unit 28P No. 24 (BLU) No. 7 (BLU) Under-dash fuse/relay box P OOP) No. 6 (BLU) No. 7 (BLU) TPMS control unit 20P No. 7 (BLU) No. 7 (BLU) Immobilizer control unit-receiver 7P No. 3 (GRY) No. 1 (GRY) Is there continuity between the DLC terminal and each of the terminals in the chart? YES -Replace the unit that does not communicate with the HDS. NO -Repair open in the wire between the DLC (K-line or DIAG-H line) and the appropriate connector.
Do the gauge self-diagnostic function (see «SELF-DIAGNOSTIC FUNCTION»(/acura/tsx/i-2003-2008/remont/gauges-instrument-panels/#display-and-gauge-system__self-diagnostic-function) ).
Check for B-CAN system DTCs without the HDS (see «GENERAL TROUBLESHOOTING INFORMATION»(/acura/tsx/i-2003-2008/remont/communication-devices/#multiplex-integrated-control-system) ). Is DTC B1168, B1169, and/or B1178 indicated? YES -Go to step 36 . NO -Go to step 23.
Turn the ignition switch OFF.
Disconnect the HDS from the DLC.
Measure voltage between DLC terminal No. 16 and body ground. Is there battery voltage? YES -Go to step 26. NO -Repair open in the wire between DLC terminal No. 16 and the No. 18 ACG (15 A) fuse in the under-dash fuse/relay box.
Measure voltage between DLC terminals No. 4 and No. 16. Is there battery voltage? YES -Go to step 27. NO -Repair open in the wire between DLC terminal No. 4 and body ground (G501) (see «DASHBOARD WIRE HARNESS (LEFT BRANCH)»(/acura/tsx/i-2003-2008/remont/body-electrical/#connectors-and-harnesses__dashboard-wire-harness-left-branch) ).
Connect the HDS to the DLC (see «HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-use-the-hds-honda) ).
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Disconnect the HDS from the DLC.
Connect DLC terminal No. 6 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal El 1 and body ground. Is there continuity? YES -Go to step 33. NO -Repair open in the wire between the ECM/PCM (E11) and DLC terminal No. 6.
Disconnect the jumper wire.
Connect DLC terminal No. 14 to body ground with a jumper wire.
Check for continuity between ECM/PCM connector terminal E24 and body ground. Is there continuity? YES -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Repair open in the wire between the ECM/PCM (E24) and DLC terminal No. 14.
Try to start the engine. Does the engine start and idle smoothly? YES -Go to the F-CAN circuit troubleshooting (see «F-CAN CIRCUIT TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__f-can-circuit-troubleshooting) ). NO -Go to step 37.
Turn the ignition switch OFF.
Check the No. 23 +B IG1 MAI N (50 A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES -Repair open in the wire between the No. 23 +B IG1 MAIN (50 A) fuse and the ignition switch. If the wire is OK, go to step 39. NO -Repair short in the wire between the No. 23 +B IG1 MAIN (50 A) fuse and the ignition switch. Also replace the No. 23 +B IG1 MAIN (50 A) fuse.
Inspect the No. 8 FI ECU (ECM/PCM) (15 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES -Go to step 46 . NO -Go to step 40.
Remove the blown No. 8 FI ECU (ECM/PCM) (15 A) fuse from the under-hood fuse/relay box.
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box.
Check for continuity between body ground and PGM-FI main relay 1 (FI MAIN) 4P connector terminals No. 1 and No. 4 individually. Is there continuity? YES -Repair short in the wire between the No. 8 FI ECU (ECM/PCM) (15 A) fuse and PGM-FI main relay 1 (FI MAIN). Also replace the No. 8 FI ECU (ECM/PCM) (15 A) fuse. NO -Go to step 43.
Disconnect each of the components or connectors, one at a time, and check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 2 and body ground. PGM-FI main relay 2 (FUEL PUMP) A/F sensor relay (LAF) Throttle actuator control module relay ECM/PCM connector A (31P) Each injector 2P connector Camshaft position (CMP) sensor B 3P connector Crankshaft position (CKP) sensor 3P connector Does continuity go away when one of the above components is disconnected? YES -Replace the component that made the short to body ground go away when disconnected. If the item is the ECM/PCM, Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). Also replace the No. 8 FI ECU (ECM/PCM) (15 A) fuse. NO -Go to step 44.
Disconnect the connectors from these components: PGM-FI main relay 2 (FUEL PUMP) A/F sensor relay (LAF) Throttle actuator control module relay ECM/PCM connector A (31P) Injectors Camshaft position (CMP) sensor B Crankshaft position (CKP) sensor
Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 2 and body ground. Is there continuity? YES -Repair short in the wire between PGM-FI main relay 1 (FI MAIN) and each item. Also replace the No. 8 FI ECU (ECM/PCM) (15 A) fuse. NO -Replace PGM-FI main relay 1 (FI MAIN). Also replace the No. 8 FI ECU (ECM/PCM) (15 A) fuse.
Inspect the No. 19 FUEL PUMP (15 A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES -Go to step 59 . NO -Go to step 47.
Remove the blown No. 19 FUEL PUMP (15 A) fuse from the under-dash fuse/relay box.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E9 and body ground. Is there continuity? YES -Go to step 51. NO -Replace the No. 19 FUEL PUMP (15 A) fuse, and Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 2 (FUEL PUMP) (A) from the under-dash fuse/relay box.
Check for continuity between ECM/PCM connector terminal E9 and body ground. Is there continuity? YES -Repair short in the wire between the No. 19 FUEL PUMP (15 A) fuse and the ECM/PCM (E9), or between the No. 19 FUEL PUMP (15 A) fuse and PGM-FI main relay 2 (FUEL PUMP), or between the No. 19 FUEL PUMP (15 A) fuse and the immobilizer control unit-receiver. Also replace the No. 19 FUEL PUMP (15 A) fuse. NO -Go to step 53.
Remove the trunk floor trim panel (see «TRIM REMOVAL/INSTALLATION - TRUNK AREA»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-trunk-area) ).
Remove the access panel from the floor (see «FUEL TANK UNIT REMOVAL AND INSTALLATION»(/acura/tsx/i-2003-2008/remont/fuel-system/#fuel-supply-system__fuel-tank-unit-removal-and-installation) ).
Disconnect the fuel pump 5P connector.
Check for continuity between fuel pump 5P connector terminal No. 5 and body ground. Is there continuity? YES -Repair short in the wire between the fuel pump and PGM-FI main relay 2 (FUEL PUMP). Also replace the No. 19 FUEL PUMP (15 A) fuse. NO -Go to step 57.
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 2 (FUEL PUMP) (A) from the under-dash fuse/relay box.
Check for continuity between fuel pump 5P connector terminal No. 5 and body ground. Is there continuity? YES -Replace PGM-FI main relay 2 (FUEL PUMP). Also replace the No. 19 FUEL PUMP (15 A) fuse. NO -Check the fuel pump, and replace it if necessary. Also replace the No. 19 FUEL PUMP (15 A) fuse.
Jump the SCS line with the HDS.
Disconnect ECM/PCM connector E (31P).
Turn the ignition switch ON (II).
Measure voltage between ECM/PCM connector terminal E9 and body ground. Is there battery voltage? YES -Go to step 63. NO -Repair open in the wire between the No. 19 FUEL PUMP (15 A) fuse and the ECM/PCM (E9).
Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage? YES -Go to step 68 . NO -Go to step 64.
Turn the ignition switch OFF.
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box.
Measure voltage between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 4 and body ground. Is there battery voltage? YES -Go to step 67. NO -Repair open in the wire between the No. 8 FI ECU (ECM/PCM) (15 A) fuse and PGM-FI main relay 1 (FI MAIN).
Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 3 and ECM/PCM connector terminal E7. Is there continuity? YES -Test PGM-FI main relay 1 (FI MAIN) (see «POWER RELAY TEST»(/acura/tsx/i-2003-2008/remont/body-electrical/#relays__power-relay-test) ). If the relay is OK, update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and the ECM/PCM (E7).
Reconnect ECM/PCM connector E (31P).
Turn the ignition switch ON (II).
Measure voltage between body ground and ECM/PCM connector terminals A2 and A3 individually. Is there battery voltage? YES -Go to step 75 . NO -Go to step 71.
Turn the ignition switch OFF.
Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(/acura/tsx/i-2003-2008/remont/exteriorinterior-trim/#interior-trim__trim-removalinstallation-door-areas) ), then remove PGM-FI main relay 1 (FI MAIN) (A) from the under-dash fuse/relay box.
Measure voltage between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 74. NO -Repair open in the wire between the No. 8 FI ECU (ECM/PCM) (15 A) fuse and PGM-FI main relay 1 (FI MAIN).
Check for continuity between PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 2 and ECM/PCM connector terminals A2 and A3 individually. Is there continuity? YES -Replace PGM-FI main relay 1 (FI MAIN). NO -Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and the ECM/PCM (A2, A3).
Measure voltage between body ground and ECM/PCM connector terminals A4, A5, A8, and A9 individually. Is there more than 0.2 V? YES -Repair open in the wire(s) that had more than 0.2 V between G101 and the ECM/PCM (A4, A5, A8, A9). NO -Go to step 76.
Measure voltage between body ground and ECM/PCM connector terminal A21. Is there about 5 V? YES -Go to step 84 . NO -Go to step 77.
Turn the ignition switch OFF.
Disconnect the connector from each of these sensors, one at a time, and measure voltage between body ground and ECM/PCM connector terminal A21 with the ignition switch ON (II). Manifold absolute pressure (MAP) sensor Accelerator pedal position (APP) sensor Input shaft (mainshaft) speed sensor (A/T) Is there about 5 V? YES -Replace the sensor that restored 5 V when disconnected. NO -Go to step 79.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the connectors from these sensors: Manifold absolute pressure (MAP) sensor Accelerator pedal position (APP) sensor Input shaft (mainshaft) speed sensor (A/T)
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A21 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A21) and the MAP sensor, the APP sensor, or the input shaft (mainshaft) speed sensor (A/T). NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Measure voltage between body ground and ECM/PCM connector terminal A20. Is there about 5 V? YES -Go to step 92 . NO -Go to step 85.
Turn the ignition switch OFF.
Disconnect the connector from each of these sensors, one at a time, and measure voltage between body ground and ECM/PCM connector terminal A20 with the ignition switch ON (II). Accelerator pedal position (APP) sensor Output shaft (countershaft) speed sensor Is there about 5 V? YES -Replace the sensor that restored 5 V when disconnected. NO -Go to step 87.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the connector from these sensors: Accelerator pedal position (APP) sensor Output shaft (countershaft) speed sensor
Disconnect ECM/PCM connector A (31P).
Check for continuity between ECM/PCM connector terminal A20 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (A20) and the APP sensor or the output shaft (countershaft) speed sensor. NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
Measure voltage between body ground and ECM/PCM connector terminal E5. Is there about 5 V? YES -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). NO -Go to step 93.
Turn the ignition switch OFF.
Disconnect the FTP sensor 3P connector, and measure voltage between body ground and ECM/PCM connector terminal E5 with the ignition switch ON (II). Is there about 5 V? YES -Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#evap-system) ). NO -Go to step 95.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Disconnect the FTP sensor 3P connector.
Disconnect ECM/PCM connector E (31P).
Check for continuity between ECM/PCM connector terminal E5 and body ground. Is there continuity? YES -Repair short in the wire between the ECM/PCM (E5) and the FTP sensor. NO -Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__substituting-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 212

Scheme 212: Injector Replacement

Scheme 213

Relieve fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/tsx/i-2003-2008/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) ).
Remove the engine cover; '04-05 models (see step 3 of «REMOVAL ('04-05 MODELS)»(/acura/tsx/i-2003-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ), '06-08 models (see step 3 of «REMOVAL ('06-08 MODELS)»(/acura/tsx/i-2003-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ).
Disconnect the connectors from the injectors (A) and the engine mount control solenoid valve (B).
Remove the ground cable bolt (G101) (C).
Disconnect the quick-connect fitting (D).
Remove the fuel rail mounting nuts (E) from the fuel rail (F).
Remove the fuel rail and the injectors from the injector base.
Remove the injector clips (G) from the injectors.
Remove the injectors from the fuel rail.
Coat the new O-rings (A) with clean engine oil, and insert the injectors (B) into the fuel rail (C).
Install the injector clips (D).
Coat the injector O-rings (E) with clean engine oil.
Install the fuel rail insulator (F), then install the fuel rail and injectors in the injector base (G).
Install the fuel rail mounting nuts (H).
Connect the connectors on the injectors and the engine mount control solenoid valve, then reinstall the ground cable bolt.
Connect the quick-connect fitting.
Turn the ignition switch ON (II), but do not operate the starter. After the fuel pump runs for about 2 seconds, the fuel rail will be pressurized. Repeat this two or three times, then check for fuel leakage.
Install the engine cover.

A/F Sensor Replacement

Special Tools Required

O2 sensor wrench. Snap-on SWR2, Snap-on YA9375, or equivalent, commercially available

Scheme 214

Scheme 214: A/F Sensor Replacement

Disconnect the A/F sensor 4P connector (A), then remove the A/F sensor (B).
Install the parts in the reverse order of removal.

Secondary HO2S Replacement

Special Tools Required

O2 sensor wrench. Snap-on SWR2, Snap-on YA9375, or equivalent, commercially available

Scheme 215

Scheme 215: Secondary HO2S Replacement

Scheme 216

Pull back the carpet from the floor rail under the front edge of the front passenger seat to expose the secondary H02S 4P connector that is attached to the floor rail.
Disconnect the secondary H02S 4P connector (A), under the passenger's seat.
Remove the secondary H02S (A), and the clips (B).
Install the parts in the reverse order of removal.

Scheme 217

Scheme 217: ECT Sensor/ECT Sensor 1 Replacement

Drain the engine coolant; '04-05 models (see «COOLANT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ).
Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/mechanical/#intake-air-system) ).
Remove the EVAP canister purge valve (see «EVAP CANISTER REPLACEMENT»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#evap-system) ).
Unbolt the under-hood fuse/relay box bolt and move the box aside.
Disconnect the ECT sensor/ECT sensor 1 2P connector (A).
Remove the ECT sensor/ECT sensor 1 (B).
Install the parts in the reverse order of removal with a new O-ring (C), then refill the radiator with engine coolant; '04-05 models (see «COOLANT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ), '06-08 models (see «'06-08 MODELS»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ).

Scheme 218

Scheme 218: CMP Sensor B Replacement

Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/mechanical/#intake-air-system) ).
Remove the EVAP canister purge valve (see «EVAP CANISTER REPLACEMENT»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#evap-system) ).
Disconnect the CMP sensor B 3P connector (A).
Remove CMP sensor B(B).
Install the parts in the reverse order of removal with a new O-ring (C).

Scheme 219

Scheme 219: IAT Sensor Replacement

Disconnect the IAT sensor 2P connector (A).
Remove the clamp (B) and the IAT sensor (C).
Install the parts in the reverse order of removal.

Scheme 220

Scheme 220: Knock Sensor Replacement

Remove the intake manifold; '04-05. models (see «REMOVAL ('04-05 MODELS)»(/acura/tsx/i-2003-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ), '06-08 models (see «REMOVAL ('06-08 MODELS)»(/acura/tsx/i-2003-2008/remont/exhaust/#intake-manifold-and-exhaust-system) ).
Disconnect the knock sensor 1P connector (A).
Remove the knock sensor (B).
Install the parts in the reverse order of removal.

Scheme 221

Scheme 221: CKP Sensor Replacement

Disconnect the CKP sensor 3P connector (A).
Remove the CKP sensor (B).
Install the parts in the reverse order of removal with a new O-ring (C).
Do the CKP pattern clear/CKP pattern learn procedure with the HDS (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).

Scheme 222

Scheme 222: Output Shaft (Countershaft) Speed Sensor Replacement

Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(/acura/tsx/i-2003-2008/remont/mechanical/#intake-air-system) ).
Disconnect the output shaft (countershaft) speed sensor 3P connector (A).
Remove the output shaft (countershaft) speed sensor (B).
Install the parts in the reverse order of removal with a new O-ring (C).

Scheme 223

Scheme 223: MAP Sensor Replacement

Disconnect the MAP sensor 3P connector (A).
Remove the screw (B).
Remove the MAP sensor (C).
Install the parts in the reverse order of removal with a new O-ring (D).

Scheme 224

Scheme 224: ECT Sensor 2 Replacement

Drain the engine coolant (see «COOLANT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ).
Remove the splash shield.
Disconnect ECT sensor 2 2P connector (A), then remove ECT sensor 2 (B).
Install the parts in the reverse order of removal with a new O-ring (C).
Refill the radiator with engine coolant (see «COOLANT REPLACEMENT»(/acura/tsx/i-2003-2008/remont/cooling-system-mechanical/#cooling-system) ).

ECM/PCM Replacement

Special Tools Required

Honda diagnostic system (HDS) tablet tester
Honda interface module (HIM) and iN workstation with HDS and CM update software
HDS pocket tester
GNA-600 and an iN workstation with HDS and CM update software

Note. Make sure the HDS is loaded with the latest software version. If you are replacing the ECM/PCM after substituting a known-good ECM/PCM, reinstall the original ECM/PCM first, then do this procedure.

Scheme 225

Scheme 225: '04-05 models

Scheme 226

Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
Turn the ignition switch ON (II).
Make sure the HDS communicates with the ECM/PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__dlc-circuit-troubleshooting) ). If you are returning from DLC circuit troubleshooting, skip steps 4 through 6 , and clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/i-2003-2008/remont/mechanical/#intake-air-system__throttle-body-cleaning) ) after replacing the ECM/PCM.
Select the PGM-FI system with the HDS.
Select the INSPECTION MENU with the HDS.
Select the TP POSITION CHECK in the ETCS TEST with the HDS. NOTE: If the TP POSITION CHECK fails, go to step 7.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Remove the center lower covers (A).
Remove the duct (B).
Disconnect ECM/PCM connectors (C).
Remove the bolts (D), then remove the ECM/PCM (E).
Install the parts in the reverse order of removal.
Turn the ignition switch ON (II).
Manually input the VIN to the ECM/PCM with the HDS. NOTE: '05 model: DTC P0630 "VIN Not Programmed or Mismatch" may be stored because the VIN has not been programmed into the ECM/PCM; ignore it, and continue this procedure.
Select IMMOBI system with the HDS.
Enter the immobilizer code with the ECM/PCM replacement procedure in the HDS; it allows you to start the engine.
If the TP POSITION CHECK failed in step 6 clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/i-2003-2008/remont/mechanical/#intake-air-system__throttle-body-cleaning) ), then go to step 19.
Select PGM-FI system and reset the ECM/PCM with the HDS.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ).
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Do the CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).

Special Tools Required

Honda diagnostic system (HDS) tablet tester
Honda interface module (HIM) and iN workstation with HDS and CM update software
HDS pocket tester
GNA-600 and an iN workstation with HDS and CM update software

Note. Make sure the HDS is loaded with the latest software version. If you are replacing the ECM/PCM after substituting a known-good ECM/PCM, reinstall the original ECM/PCM, then do this procedure. During the procedure, if any READ DATA, WRITE DATA, or other data checks fail, note the failure, then continue.

Scheme 227

Scheme 227: '06-08 models

Scheme 228

Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
Turn the ignition switch ON (II).
Make sure the HDS communicates with the ECM/PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting; '06 model (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system__dlc-circuit-troubleshooting) ), '07-08 models (see «'07-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ). If you are returning from DLC circuit troubleshooting, skip steps 4 through 7 , 17 through 19 , and 22 through 23 , and do the following procedures after replacing the ECM/PCM; Replace the engine oil (see «ENGINE OIL REPLACEMENT»(/acura/tsx/i-2003-2008/remont/lubrication-system/#engine-lubrication-system) ) and the engine oil filter (see «ENGINE OIL FILTER REPLACEMENT»(/acura/tsx/i-2003-2008/remont/lubrication-system/#engine-lubrication-system__engine-oil-filter-replacement) ). Clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/i-2003-2008/remont/mechanical/#intake-air-system__throttle-body-cleaning) ).
Select the PGM-FI system with the HDS.
Select the INSPECTION MENU with the HDS.
Select the ETCS TEST, then select the TP POSITION CHECK, and follow the screen prompts. NOTE: If the TP POSITION CHECK indicates FAILED, continue with this procedure.
Select the REPLACE ECM/PCM MENU, then READ DATA and follow the screen prompts. NOTE: Doing this step copies (READS) the engine oil life data from the original ECM/PCM so you can later download (WRITES) it into the new ECM/PCM. If READ DATA indicates FAILED, continue with this procedure.
Turn the ignition switch OFF.
Jump the SCS line with the HDS.
Remove the center lower covers (A).
Remove the duct (B).
Disconnect ECM/PCM connectors (C).
Remove the bolts (D), then remove the ECM/PCM (E)
Install the parts in the reverse order of removal.
Turn the ignition switch ON (II).
Manually input the VIN to the ECM/PCM with the HDS. NOTE: DTC P0630 "VIN Not Programmed or Mismatch" may be stored because the VIN has not been programmed into the ECM/PCM; ignore it, and continue this procedure.
If the READ DATA (engine oil life) failed in step 7 , go to step 20 . Otherwise, go to step 18.
Select the PGM-FI system with the HDS.
Select the REPLACE ECM/PCM MENU, then WRITE DATA and follow the screen prompts. NOTE: If the WRITE DATA indicates FAILED, continue with this procedure.
Select IMMOBI system with the HDS.
Enter the immobilizer code with the ECM/PCM replacement procedure in the HDS; it allows you to start the engine.
If the TP POSITION CHECK failed in step 6 clean the throttle body (see «THROTTLE BODY CLEANING»(/acura/tsx/i-2003-2008/remont/mechanical/#intake-air-system__throttle-body-cleaning) ), then go to step 23.
If the READ DATA failed in step 7 or the WRITE DATA failed instep 19 , replace the engine oil (see «ENGINE OIL REPLACEMENT»(/acura/tsx/i-2003-2008/remont/lubrication-system/#engine-lubrication-system) ) and engine oil filter (see «ENGINE OIL FILTER REPLACEMENT»(/acura/tsx/i-2003-2008/remont/lubrication-system/#engine-lubrication-system__engine-oil-filter-replacement) ), then go to step 24.
Select PGM-FI system and reset the ECM/PCM with the HDS.
Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__updating-the-ecmpcm) ).
Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/tsx/i-2003-2008/remont/engine-control-systems/#idle-control-system__ecmpcm-idle-learn-procedure) ).
Do the CKP pattern learn procedure (see «CRANK (CKP) PATTERN CLEAR/CRANK (CKP) PATTERN LEARN»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems) ).

Pgm-Fi System Acura TSX I

Scheme 1

Scheme 2

DTC P0107: MAP Sensor Circuit Low Voltage

Scheme 3

Scheme 4

Scheme 5

DTC P0108: MAP Sensor Circuit High Voltage

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

DTC P0111: IAT Sensor Circuit Range/ Performance Problem ('06-08 models)

DTC P0112: IAT Sensor Circuit Low Voltage

Scheme 11

DTC P0113: IAT Sensor Circuit High Voltage

Scheme 12

Scheme 13

Scheme 14

Scheme 15

Scheme 16

DTC P0116: ECT Sensor Circuit Range/ Performance Problem ('04-05 models)

DTC P0116: ECT Sensor 1 Circuit Range/ Performance Problem ('06-08 models)

DTC P0117: ECT Sensor Circuit Low Voltage ('04-05 models); DTC P0117: ECT Sensor 1 Circuit Low Voltage ('06-08 models)

Scheme 17

DTC P0118: ECT Sensor Circuit High Voltage ('04-05 models); DTC P0118: ECT Sensor 1 Circuit High Voltage ('06-08 models)

Scheme 18

Scheme 19

Scheme 20

Scheme 21

Scheme 22

DTC P0125: ECT Sensor Malfunction/Slow Response ('04-05 models)

DTC P0125: ECT Sensor 1 Malfunction/Slow Response ('06-08 models)

DTC P0128: Cooling System Malfunction ('04-05 models)

DTC P0128: Cooling System Malfunction ('06-08 models)

DTC P0133: A/F Sensor (Sensor 1) Malfunction/Slow Response ('04-05 models)

DTC P0133: A/F Sensor (Sensor 1) Malfunction/Slow Response ('06-08 models)

DTC P0134: A/F Sensor (Sensor 1) Heater System Malfunction

DTC P0135: A/F Sensor (Sensor 1) Heater Circuit Malfunction

Scheme 23

Scheme 24

Scheme 25

Scheme 26

Scheme 27

Scheme 28

Scheme 29

Scheme 30

Scheme 31

DTC P0137: Secondary HO2S (Sensor 2) Circuit Low Voltage ('04 model)

Scheme 32

DTC P0137: Secondary HO2S (Sensor 2) Circuit Low Voltage ('05-08 models)

Scheme 33

DTC P0138: Secondary HO2S (Sensor 2) Circuit High Voltage ('04 model)

Scheme 34

Scheme 35

Scheme 36

Scheme 37

DTC P0138: Secondary HO2S (Sensor 2) Circuit High Voltage ('05-08 models)

Scheme 38

Scheme 39

Scheme 40

DTC P0139: Secondary HO2S (Sensor 2) Slow Response ('04 model)

DTC P0139: Secondary HO2S (Sensor 2) Slow Response ('05-08 models)

DTC P0141: Secondary HO2S (Sensor 2) Heater Circuit Malfunction

Scheme 41

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

Scheme 47

DTC P0171: Fuel System Too Lean; DTC P0172: Fuel System Too Rich

DTC P0300: Random Misfire and Any Combination of the Following:; DTC P0301: No. 1 Cylinder Misfire Detected; DTC P0302: No. 2 Cylinder Misfire Detected; DTC P0303: No. 3 Cylinder Misfire Detected; DTC P0304: No. 4 Cylinder Misfire Detected

Scheme 48

DTC P0301: No. 1 Cylinder Misfire Detected; DTC P0302: No. 2 Cylinder Misfire Detected; DTC P0303: No. 3 Cylinder Misfire Detected; DTC P0304: No. 4 Cylinder Misfire Detected

Scheme 49

Scheme 50

Scheme 51

Scheme 52