Pgm-Fi System Acura RSX I

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DTC Troubleshooting

DTC INDEX

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1. Turn the ignition switch ON (II).
2. Check the MAP with a scan tool or the HDS. Is about 101 kPa (30 in.Hg, 760 mmHg) or 2.9 V indicated? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM. NO - Go to step 3.
3. Turn the ignition switch OFF.
4. Disconnect the MAP sensor 3P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between MAP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Go to step 8 . NO - Go to step 7.
7. Measure voltage between ECM/PCM connector terminals A11 and A21. Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A21) and the MAP sensor. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
8. Check the MAP with a scan tool or the HDS. Is 2 kPa (0.6 in.Hg, 15 mmHg) or less, or 0 V indicated? YES - Go to step 9. NO - Replace the MAP sensor (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
9. Turn the ignition switch OFF.
10. Disconnect ECM/PCM connector A (31P).
11. 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 (A19) and the MAP sensor. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

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1. Turn the ignition switch ON (II).
2. 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, system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the MAP sensor 3P connector.
5. Turn the ignition switch ON (II).
6. 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.
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.
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 .
9. Turn the ignition switch OFF.
10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector A (31P).
12. 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 20 .
13. Turn the ignition switch OFF.
14. Replace the MAP sensor (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
15. Reconnect all connectors.
16. Turn the ignition switch ON (II).
17. Reset the ECM/PCM with the HDS.
18. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
19. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0107 is indicated, check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
20. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
21. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0107 is indicated, check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

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1. 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.
2. Check the MAP with a scan tool or the HDS. Is more than 101 kPa (30 in.Hg, 760 mmHg), or more than 2.9 V indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the MAP sensor 3P connector.
5. Connect MAP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
6. Turn the ignition switch ON (II).
7. Check the MAP with a scan tool or the HDS. Is more than 101 kPa (30 in.Hg, 760 mmHg), or more than 2.9 V indicated? YES - Go to step 8. NO - Replace the MAP sensor (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
8. Remove the jumper wire.
9. Measure voltage between MAP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Go to step 14 . NO - Go to step 10.
10. Turn the ignition switch OFF.
11. Disconnect ECM/PCM connector A (31P).
12. Connect MAP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
13. Check for continuity between ECM/PCM connector terminal A11 and body ground. Is there continuity? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair open in the wire between the ECM/PCM (A11) and the MAP sensor.
14. Turn the ignition switch OFF.
15. Connect ECM/PCM connector terminals A11 and A19 with a jumper wire.
16. Turn the ignition switch ON (II).
17. Check the MAP with a scan tool or the HDS. Is more than 101 kPa (30 in.Hg, 760 mmHg), or more than 2.9 V indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair open in the wire between the ECM/PCM (A19) and the MAP sensor.

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1. Turn the ignition switch ON (II).
2. Check the MAP SENSOR in the DATA LIST with the HDS. Is 160 kPa (47.1 in.Hg, 1,197 mmHg), 4.49 V or more indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the MAP sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the MAP sensor 3P connector.
5. Connect MAP sensor 3P connector terminals No. 2 and No. 3 with a jumper wire.
6. Turn the ignition switch ON (II).
7. Check the MAP SENSOR in the DATA LIST with the HDS. Is 160 kPa (47.1 in.Hg, 1,197 mmHg), 4.49 V or more indicated? YES - Go to step 8. NO - Go to step 19 .
8. Remove the jumper wire from the MAP sensor 3P connector.
9. 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.
10. Turn the ignition switch OFF.
11. Jump the SCS line with the HDS.
12. Disconnect ECM/PCM connector A (31P).
13. Connect MAP sensor 3P connector terminal No. 3 to body ground with a jumper wire.
14. Check for continuity between ECM/PCM connector terminal A24 and body ground. Is there continuity? YES - Go to step 26 . NO - Repair open in the wire between the ECM/PCM (A24)and the MAP sensor, then go to step 21 .
15. Turn the ignition switch OFF.
16. Connect ECM/PCM connector terminals A24 and A30 with a jumper wire.
17. Turn the ignition switch ON (II).
18. Check the MAP SENSOR in the DATA LIST with the HDS. Is 160 kPa (47.1 in.Hg, 1,197 mmHg), 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 22 .
19. Turn the ignition switch OFF.
20. Replace the MAP sensor (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
21. Reconnect all connectors.
22. Turn the ignition switch ON (II).
23. Reset the ECM/PCM with the HDS.
24. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
25. Check for Temporary DTCs or DTCs with HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0108 is indicated, check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
26. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
27. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0108 is indicated, check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0111, P1116: IAT Sensor Circuit Range/Performance Problem (2005-2006 models); ECT Sensor Circuit Range/Performance Problem (2005-2006 models)

1. Check for poor connections or loose terminals at the ECT sensor 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 25 .
2. Start the engine, and let it idle for 10 minutes.
3. Check the ECT SENSOR in the DATA LIST with the HDS. Is about 129°F (54°C) or less, or 1.54 V or more indicated? YES - Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 25 . NO - Go to step 4.
4. Turn the ignition switch OFF.
5. Remove the IAT sensor (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
6. Allow the IAT sensor to cool to 77°F (25°C).
7. Note the ambient temperature.
8. Connect the IAT sensor to the 2P connector. Do not install the sensor on the air intake duct.
9. Turn the ignition switch ON (II).
10. Note the value of the IAT SENSOR quickly in the DATA LIST with the HDS.
11. Compare the IAT SENSOR and the ambient temperature. Does the IAT SENSOR differ 5.4°F (3°C) or more? YES - Replace the IAT sensor (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 25 . NO - Go to step 12.
12. Disconnect the IAT sensor from the 2P connector.
13. 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.
14. Connect the IAT sensor to the 2P connector. Do not install the sensor on the air intake duct.
15. Check the IAT SENSOR in the DATA LIST with the HDS. Does the IAT SENSOR change 82°F (28°C) or more? YES - Go to step 16. NO - Replace the IAT sensor (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 25 .
16. Turn the ignition switch OFF.
17. Drain the coolant (see «COOLANT CHECK»(/acura/rsx/i-2001-2004/remont/cooling-system-mechanical/#cooling-system) ).
18. Remove the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
19. Allow the ECT sensor to cool to 77°F (25°C).
20. Note the ambient temperature.
21. Connect the ECT sensor to the 2P connector. Do not install the sensor on the engine.
22. Turn the ignition switch ON (II).
23. Note the value of ECT SENSOR quickly in the DATA LIST with the HDS.
24. Compare the ECT SENSOR and the ambient temperature. Does the ECT SENSOR differ 5.4°F (3°C) or more? YES - Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 25. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM.
25. Turn the ignition switch ON (II).
26. Reset the ECM/PCM with the HDS.
27. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
28. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0111 and/or P1116 is indicated, check for poor connections or loose terminals at the ECT sensor, or the IAT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.

Scheme 23

1. Turn the ignition switch ON (II).
2. Check the IAT with a scan tool or the HDS. Is 302°F (150°C) or higher, or 0 V indicated? YES - Go to step 3. NO - Go to step 10 .
3. Turn the ignition switch OFF.
4. Disconnect the IAT sensor 2P connector.
5. Turn the ignition switch ON (II).
6. Check the IAT with a scan tool or the HDS. Is 302°F (150°C) or higher, or 0 V indicated? YES - Go to step 7. NO - Replace the IAT sensor (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
7. Turn the ignition switch OFF.
8. Disconnect ECM/PCM connector B (24P).
9. 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 ECM/PCM (B17) and the IAT sensor. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
10. Check the temperature reading on a scan tool or the HDS. Be aware that if the engine is warm, the reading will be higher than ambient temperature. If the engine is cold, the IAT and ECT will have the same value. Is the correct ambient temperature indicated? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM. NO - Replace the IAT sensor (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 24

1. Turn the ignition switch ON (II).
2. Check the IAT SENSOR in the DATA LIST with the HDS. Is about 356°F (180°C) or higher, or 0.08 V or less indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the IAT sensor 2P connector.
5. Turn the ignition switch ON (II).
6. Check the IAT SENSOR in the DATA LIST with the HDS. Is about 356°F (180°C) or higher, or 0.08 V or less indicated? YES - Go to step 7. NO - Go to step 11 .
7. Turn the ignition switch OFF.
8. Jump the SCS line with the HDS.
9. Disconnect ECM/PCM connector B (24P).
10. 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 .
11. Turn the ignition switch OFF.
12. Replace the IAT sensor (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
13. Reconnect all connectors.
14. Turn the ignition switch ON (II).
15. Reset the ECM/PCM with the HDS.
16. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
17. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0112 is indicated, check for poor connections or loose terminals at the IAT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
18. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
19. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0112 is indicated, check for poor connections or loose terminals at the IAT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

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1. Turn the ignition switch ON (II).
2. Check the IAT with a scan tool or the HDS. Is -4°F ( -20°C) or less, or 5 V indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the IAT sensor 2P connector.
5. Connect IAT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.
6. Turn the ignition switch ON (II).
7. Check the IAT with a scan tool or the HDS. Is -4°F ( -20°C) or less, or 5 V indicated? YES - Go to step 8. NO - Replace the IAT sensor (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
8. Turn the ignition switch OFF.
9. Remove the jumper wire.
10. Turn the ignition switch ON (II).
11. 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 15 .
12. Turn the ignition switch OFF.
13. Connect IAT sensor 2P connector terminal No. 1 to body ground with a jumper wire.
14. Check for continuity between ECM/PCM connector terminal A10 and body ground. Is there continuity? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair open in the wire between the ECM/PCM (A10) and the IAT sensor.
15. 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. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

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1. Turn the ignition switch ON (II).
2. Check the IAT SENSOR in the DATA LIST with the HDS. Is about -40°F ( -40°C) or less, or 4.92 V or more indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the IAT sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the IAT sensor 2P connector.
5. Connect IAT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.
6. Turn the ignition switch ON (II).
7. Check the IAT SENSOR in the DATA LIST with the HDS. Is about -40°F ( -40 °C) or less, or 4.92 V or more indicated? YES - Go to step 8. NO - Go to step 18 .
8. Turn the ignition switch OFF.
9. Remove the jumper wire from the IAT sensor 2P connector.
10. Turn the ignition switch ON (II).
11. 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 .
12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect ECM/PCM connector A (31P).
15. Connect IAT sensor 2P connector terminal No. 1 to body ground with a jumper wire.
16. Check for continuity between ECM/PCM connector terminal A23 and body ground. Is there continuity? YES - Go to step 25 . NO - Repair open in the wire between the ECM/PCM (A23) and the IAT sensor, then go to step 20 .
17. 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 .
18. Turn the ignition switch OFF.
19. Replace the IAT sensor (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
20. Reconnect all connectors.
21. Turn the ignition switch ON (II).
22. Reset the ECM/PCM with the HDS.
23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
24. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0113 is indicated, check for poor connections or loose terminals at the IAT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
25. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0113 is indicated, check for poor connections or loose terminals at the IAT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0116: ECT Sensor Circuit Range/Performance Problem (2002-2004 models)

Note. If DTC P0117 and/or P0118 are stored at the same time as DTC P0116, troubleshoot those DTCs first, then recheck for DTC P0116.

1. Turn the ignition switch ON (II).
2. Check the ECT with a scan tool or the HDS. Is about 176°F (80°C) or higher, or 0.86 V or less indicated? YES - Go to step 3. NO - Go to step 7 .
3. Note the coolant temperature from step 2 .
4. Turn the ignition switch OFF.
5. Cool the engine for 1 hour.
6. Check the ECT with a scan tool or the HDS. Did the ECT change 3.6°F (2°C) or more? YES - Intermittent failure, system is OK at this time. Check the thermostat and the cooling system. NO - Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
7. Note the coolant temperature from step 2 .
8. 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.
9. Check the ECT with a scan tool or the HDS. Does the ECT change 3.6°F (2°C) or more? YES - Intermittent failure, system is OK at this time. Check the thermostat and the cooling system. NO - Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0116: ECT Sensor Circuit Range/Performance Problem (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Check the ECT SENSOR in the DATA LIST with the HDS. Is about 176°F (80°C) or higher, or 0.78 V or less indicated? YES - Go to step 7 . NO - Go to step 3.
3. Note the value of the ECT SENSOR in the DATA LIST with the HDS.
4. 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.
5. Check the ECT SENSOR in the DATA LIST with the HDS. Does the ECT SENSOR change 18°F (10°C) or more? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM. NO - Go to step 11 .
6. Note the value of the ECT SENSOR in the DATA LIST with the HDS.
7. Turn the ignition switch OFF.
8. Open the engine hood, and let the engine cool for 3 hours.
9. Turn the ignition switch ON (II).
10. Check the ECT SENSOR in the DATA LIST with the HDS. Does the ECT SENSOR change 18°F (10°C) or more? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM. NO - Go to step 11.
11. Turn the ignition switch OFF.
12. Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
13. Turn the ignition switch ON (II).
14. Reset the ECM/PCM with the HDS.
15. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
16. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0116 is indicated, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.

Scheme 35

1. Turn the ignition switch ON (II).
2. Check the ECT with a scan tool or the HDS. Is 302°F (150°C) or higher, or 0 V indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM.
3. Disconnect the ECT sensor 2P connector.
4. Check the ECT with a scan tool or the HDS. Is 302°F (150°C) or higher, or 0 V indicated? YES - Go to step 5. NO - Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
5. Turn the ignition switch OFF.
6. Disconnect ECM/PCM connector B (24P).
7. Check for continuity between ECT sensor 2P connector terminal No. 1 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (B8) and the ECT sensor. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 36

1. Turn the ignition switch ON (II).
2. Check the ECT SENSOR in the DATA LIST with the HDS. Is about 356°F (180°C) or higher, or 0.08 V or less indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the ECT sensor 2P connector.
5. Turn the ignition switch ON (II).
6. Check the ECT SENSOR in the DATA LIST with the HDS. Is about 356°F (180°C) or higher, or 0.08 V or less indicated? YES - Go to step 7. NO - Go to step 7 .
7. Turn the ignition switch OFF.
8. Jump the SCS line with the HDS.
9. Disconnect ECM/PCM connector B (24P).
10. Check for continuity between ECT sensor 2P connector terminal No. 1 and body ground. Is there continuity? YES - Repair short in the wire between the ECT sensor and the ECM/PCM (B8), then go to step 13 . NO - Go to step 18 .
11. Turn the ignition switch OFF.
12. Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
13. Reconnect all connectors.
14. Turn the ignition switch ON (II).
15. Reset the ECM/PCM with the HDS.
16. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
17. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0117 is indicated, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
18. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
19. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0117 is indicated, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 37

Scheme 38

Scheme 39

Scheme 40

Scheme 41

1. Turn the ignition switch ON (II).
2. Check the ECT with a scan tool or the HDS. Is -4°F ( -20°C) or less, or 5 V indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the ECT sensor 2P connector.
5. Connect ECT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.
6. Turn the ignition switch ON (II).
7. Check the ECT with a scan tool or the HDS. Is -4°F ( -20°C) or less, or 5 V indicated? YES - Go to step 8. NO - Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
8. Turn the ignition switch OFF.
9. Remove the jumper wire.
10. Turn the ignition switch ON (II).
11. Measure voltage between ECT sensor 2P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to step 12. NO - Go to step 14 .
12. Connect ECT sensor 2P connector terminal No. 2 to body ground with a jumper wire.
13. Check for continuity between ECM/PCM connector terminal A10 and body ground. Is there continuity? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair open in the wire between the ECM/PCM (A10) and the ECT sensor.
14. 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. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 42

Scheme 43

Scheme 44

Scheme 45

Scheme 46

1. Turn the ignition switch ON (II).
2. Check the ECT 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, system is OK at this time. Check for poor connections or loose terminals at the ECT sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the ECT sensor 2P connector.
5. Connect ECT sensor 2P connector terminals No. 1 and No. 2 with a jumper wire.
6. Turn the ignition switch ON (II).
7. Check the ECT 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 .
8. Turn the ignition switch OFF.
9. Remove the jumper wire from the ECT sensor 2P connector.
10. Turn the ignition switch ON (II).
11. Measure voltage between ECT sensor 2P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to step 12. NO - Go to step 17 .
12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect ECM/PCM connector A (31P).
15. Connect ECT sensor 2P connector terminal No. 2 to body ground with a jumper wire.
16. Check for continuity between ECM/PCM connector terminal A23 and body ground. Is there continuity? YES - Go to step 25 . NO - Repair open in the wire between the ECM/PCM (A23) and the ECT sensor, then go to step 20 .
17. 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, then go to step 20 . NO - Go to step 25 .
18. Turn the ignition switch OFF.
19. Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
20. Reconnect all connectors.
21. Turn the ignition switch ON (II).
22. Reset the ECM/PCM with the HDS.
23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
24. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0118 is indicated, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
25. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0118 is indicated, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0122: TP Sensor Circuit Low Voltage (2002-2004 models)

Note. Information marked with an asterisk (*) applies to K20A2 engine.

Scheme 47

Scheme 48

Scheme 49

Scheme 50

Scheme 51

Scheme 52

Scheme 53

1. Turn the ignition switch ON (II).
2. Check the throttle position with a scan tool or the HDS. Is there about 10% or 0.5 V when the throttle is fully closed and about 90% or 4.5 V when the throttle Is fully opened? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the TP sensor and the ECM/PCM. NO - Go to step 3.
3. Turn the ignition switch OFF.
4. Disconnect the TP sensor 3P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between TP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Go to step 7. NO - Go to step 14 .
7. Turn the ignition switch OFF.
8. At the sensor side, measure resistance between TP sensor 3P connector terminals No. 2 (No. 1)* and No. 3 (No. 2)* with the throttle fully closed. Is there about 0.5-0.9 kohms ? YES - Go to step 9. NO - Replace the throttle body, K20A2 engine (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system__throttle-body-removalinstallation) ), K20A3 engine (see «K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
9. Measure resistance between TP sensor 3P connector terminals No. 1 (No. 2)* and No. 2 (No. 3)* with the throttle fully closed. Is there about 4.5 kohms ? YES - Go to step 10. NO - Replace the throttle body, K20A2 engine (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system__throttle-body-removalinstallation) ), K20A3 engine (see «K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
10. Disconnect ECM/PCM connector A (31P).
11. At the wire harness side, check for continuity between TP sensor 3P connector terminal No. 2 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (A15) and the TP sensor. NO - Go to step 12.
12. Connect ECM/PCM connector terminal A15 to body ground with a jumper wire.
13. At the wire harness side, check for continuity between TP sensor 3P connector terminal No. 2 and body ground. Is there continuity? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair open in the wire between the ECM/PCM (A15) and the TP sensor.
14. Measure voltage between ECM/PCM connector terminals A10 and A20. Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A20) and the TP sensor. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0122: TP Sensor Circuit Low Voltage (2005-2006 models)

Note. Information marked with an asterisk (*) applies to K20Z1 engine.

Scheme 54

Scheme 55

Scheme 56

Scheme 57

Scheme 58

Scheme 59

Scheme 60

1. Turn the ignition switch ON (II).
2. Check the TP SENSOR in the DATA LIST with the HDS. Is there about 0.5 V when the throttle is fully closed and about 4.5 V when the throttle is fully opened? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the TP sensor and the ECM/PCM. NO - Go to step 3.
3. Turn the ignition switch OFF.
4. Disconnect the TP sensor 3P connector.
5. Turn the ignition switch ON (II).
6. On the wire harness side, measure voltage between TP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Go to step 7. NO - Go to step 15 .
7. Turn the ignition switch OFF.
8. On the sensor side, measure resistance between TP sensor 3P connector terminals No. 2 (No. 1)* and No. 3 (No. 2)* with the throttle fully closed. Is there about 0.5-0.9 kohms ? YES - Go to step 9. NO - Go to step 16 .
9. On the sensor side, measure resistance between TP sensor 3P connector terminals No. 1 (No. 2)* and No. 2 (No. 3)* with the throttle fully closed. Is there about 5.0 kohms ? YES - Go to step 10. NO - Go to step 16 .
10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector A (31P).
12. On the wire harness side, check for continuity between TP sensor 3P connector terminal No. 2 and body ground. Is there continuity? YES - Repair short in the wire between the TP sensor and the ECM/PCM (A29), then go to step 17 . NO - Go to step 13.
13. Connect ECM/PCM connector terminal A29 to body ground with a jumper wire.
14. On the wire harness side, check for continuity between TP sensor 3P connector terminal No. 2 and body ground. Is there continuity? YES - Go to step 22 . NO - Repair open in the wire between the TP sensor and the ECM/PCM (A29), then go to step 17 .
15. Measure voltage between ECM/PCM connector terminals A20 and A23. Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A20) and the TP sensor, then go to step 18 . NO - Go to step 22 .
16. Replace the throttle body, K20Z1 engine (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system__throttle-body-removalinstallation) ), K20A3 engine (see «K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
17. Reconnect all connectors.
18. Turn the ignition switch ON (II).
19. Reset the ECM/PCM with the HDS.
20. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
21. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0122 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
22. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
23. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0122 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0123: TP Sensor Circuit High Voltage (2002-2004 models)

Note. Information marked with an asterisk (*) applies to K20A2 engine.

Scheme 61

Scheme 62

1. Turn the ignition switch ON (II).
2. Check the throttle position with a scan tool or the HDS. Is there about 10% or 0.5 V when the throttle is fully closed and about 90% or 4.5 V when the throttle is fully opened? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the TP sensor and the ECM/PCM. NO - Go to step 3.
3. Turn the ignition switch OFF.
4. Disconnect the TP sensor 3P connector.
5. Turn the ignition switch ON (II).
6. At the wire harness side, measure voltage between TP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Replace the throttle body, K20A2 engine (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system__throttle-body-removalinstallation) ), K20A3 engine (see «K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ). NO - Go to step 7.
7. Measure voltage between ECM/PCM connector terminals A10 and A20. Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A10) and the TP sensor. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0123: TP Sensor Circuit High Voltage (2005-2006 models)

Note. Information marked with an asterisk (*) applies to K20Z1 engine.

Scheme 63

Scheme 64

1. Turn the ignition switch ON (II).
2. Check the TP SENSOR in the DATA LIST with the HDS. Is there about 0.5 V when the throttle is fully closed and about 4.5 V when the throttle is fully opened? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the TP sensor and the ECM/PCM. NO - Go to step 3.
3. Turn the ignition switch OFF.
4. Disconnect the TP sensor 3P connector.
5. Turn the ignition switch ON (II).
6. At the wire harness side, measure voltage between TP sensor 3P connector terminals No. 1 and No. 3. Is there about 5 V? YES - Go to step 8 . NO - Go to step 7.
7. Measure voltage between ECM/PCM connector terminals A20 and A23. Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A23) and the TP sensor, then go to step 10 . NO - Go to step 14 .
8. Turn the ignition switch OFF.
9. Replace the throttle body, K20Z1 engine (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system__throttle-body-removalinstallation) ), K20A3 engine (see «K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
10. Reconnect all connectors.
11. Turn the ignition switch ON (II).
12. Reset the ECM/PCM with the HDS.
13. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
14. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0123 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
15. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
16. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0123 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0125: ECT Sensor Malfunction/Slow Response (2004 model)

1. Start the engine, and let it idle.
2. Check the ECT with a scan tool or 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, system is OK at this time. Check the thermostat and the cooling system.
3. Let it idle for 6 minutes.
4. Check the ECT with a scan tool or the HDS. Is about 86°F (30°C) or less, or 2.61 V or more indicated? YES - Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Intermittent failure, system is OK at this time. Check the thermostat and the cooling system.

DTC P0125: ECT Sensor Malfunction/Slow Response (2005-2006 models)

1. Start the engine, and let it idle.
2. 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, system is OK at this time. Check the thermostat and the cooling system.
3. Let the engine idle for 6 minutes.
4. 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, system is OK at this time. Check the thermostat and the cooling system.
5. Turn the ignition switch OFF.
6. Replace the ECT sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
7. Turn the ignition switch ON (II).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
10. Allow the engine to cool to between 23°F (-5°C) and 77°F (25°C).
11. Start the engine, and let it idle for 20 minutes.
12. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0125 is indicated, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 13.
13. Monitor the OBD STATUS for DTC P0125 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 and recheck.

DTC P0128: Cooling System Malfunction (2002-2004 models)

Note. If the DTCs listed below are stored at the same time as DTC P0128, troubleshoot those DTCs first, then recheck for P0128.

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

P1106, P1107, P1108 (P2227, P2228, P2229)*

Barometric pressure (BARO) sensor

P1259 (P2646, P2647)*: VTEC system

P0116, P0117, P0118 (P0125)*: Engine coolant temperature (ECT) sensor

P0112, P0113: Intake air temperature (IAT) sensor

P0500: Vehicle speed sensor (VSS)

P0335, P0336 (P0339)*: Crankshaft position (CKP) sensor

P0300: Random misfire detected

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

P0505 (P0506, P0507)*: Idle control system malfunction

P1519 (P0511)*: Idle air control (IAC) valve

*: 2004 model

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

1. Check the engine coolant level. Is the engine coolant level low? YES - Refill the engine coolant. If necessary, repair the coolant leak. NO - Go to step 2.
2. Turn the ignition switch ON (II), and make sure the A/C is off.
3. Check the radiator fan. Does the radiator fan run continuously? YES - Check the radiator fan circuit (see «CIRCUIT DIAGRAM»(/acura/rsx/i-2001-2004/remont/cooling-fan/#fan-controls) ), the radiator fan switch circuit open (see «RADIATOR FAN SWITCH CIRCUIT TROUBLESHOOTING (OPEN)»(/acura/rsx/i-2001-2004/remont/cooling-fan/#fan-controls) ), the radiator fan switch circuit short (see «RADIATOR FAN SWITCH CIRCUIT TROUBLESHOOTING (SHORT)»(/acura/rsx/i-2001-2004/remont/cooling-fan/#fan-controls) ), and the radiator fan switch (see «RADIATOR FAN SWITCH TEST»(/acura/rsx/i-2001-2004/remont/cooling-fan/#fan-controls) ). If they are OK, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Replace the thermostat (see «THERMOSTAT REPLACEMENT»(/acura/rsx/i-2001-2004/remont/cooling-system-mechanical/#cooling-system) ).

DTC P0128: Cooling System Malfunction (2005-2006 models)

Note. If the DTCs listed below are stored at the same time as DTC P0128, troubleshoot those DTCs first, then recheck for P0128.

P0112, P0113: Intake air temperature (IAT) sensor

P0116, P0117, P0118, P0125: Engine coolant temperature (ECT) sensor

P0300: Random misfire detected

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

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.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the blower switch OFF.
4. Turn the A/C switch OFF.
5. 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 turned off, then go to step 6.
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 «CIRCUIT DIAGRAM»(/acura/rsx/i-2001-2004/remont/cooling-fan/#fan-controls) ), the radiator fan switch circuit open (see «RADIATOR FAN SWITCH CIRCUIT TROUBLESHOOTING (OPEN)»(/acura/rsx/i-2001-2004/remont/cooling-fan/#fan-controls) ), the radiator fan switch circuit short (see «RADIATOR FAN SWITCH CIRCUIT TROUBLESHOOTING (SHORT)»(/acura/rsx/i-2001-2004/remont/cooling-fan/#fan-controls) ), and the radiator fan switch (see «RADIATOR FAN SWITCH TEST»(/acura/rsx/i-2001-2004/remont/cooling-fan/#fan-controls) ). If the circuits and the switch are OK, go to step 22 . NO - Go to step 7.
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.
8. Turn the ignition switch OFF.
9. Turn the ignition switch ON (II).
10. Do the RADIATOR FAN TEST in the INSPECTION MENU with the HDS for 20 minutes.
11. 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, system is OK at this time. NO - Go to step 12.
12. Turn the ignition switch OFF.
13. Cool down the engine until the coolant temperature is between 21°F (-6°C) and 104°F (40°C).
14. Replace the thermostat (see «THERMOSTAT REPLACEMENT»(/acura/rsx/i-2001-2004/remont/cooling-system-mechanical/#cooling-system) ).
15. Turn the ignition switch ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
18. 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.
19. Test-drive at a steady speed between 15-75 mph (24-120 km/h) for 10 minutes.
20. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0128 is indicated, check the cooling system, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 21.
21. Monitor the OBD STATUS for DTC P0128 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check cooling system, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 18 and recheck.
22. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
23. Cool down the engine until the coolant temperature is between 21°F (-6°C) and 104°F (40°C).
24. 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.
25. Test-drive at a steady speed between 15-75 mph (24-120 km/h) for 10 minutes.
26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0128 is indicated, check for poor connections or loose terminals at the ECT sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0133, P1163: A/F Sensor (Sensor 1) Slow Response (2004 model); A/F Sensor (Sensor 1) Slow Response (2002-2003 models)

Note. Information marked with an asterisk (*) applies to 2004 model. Information marked with double asterisk (* *) applies to 2002-2003 models. If DTC P1162 is stored at the same time as DTC P1163, troubleshoot DTC P1162 first, then recheck for DTC P1163 (2002-2003 models).

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on.
3. Test-drive under these conditions: 55 mph (89 km/h) steady speed A/T in D4 position (M/T in 5th gear) Until readiness code or Temporary DTC P0133* (P1163)* * and/or P0133* (P1163)* * comes on
4. Check for a Temporary DTC with a scan tool or the HDS. Is Temporary DTC P0133* (P1163)* * and/or P0133* (P1163)* indicated? YES - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ). NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.

DTC P0133: A/F Sensor (Sensor 1) Slow Response (2005-2006 models)

Note. Information marked with (*1) applies to K20Z1 engine. If DTC P0139 is stored at the same time as DTC P0133, troubleshoot DTC P0139 first, then recheck for DTC P0133.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 5th gear) Vehicle speed at 25 mph (40 km/h) or less for 5 minutes, then maintain a steady speed between 26 mph (41 km/h) and 81 mph (130 km/h).
5. 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, system is OK at this time. 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.
6. Turn the ignition switch OFF.
7. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
8. Turn the ignition switch ON (II).
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
11. 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.
12. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 5th gear) Vehicle speed at 25 mph (40 km/h) or less for 5 minutes, then maintain a steady speed between 26 mph (41 km/h) and 81 mph (130 km/h).
13. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0133 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 14.
14. Monitor the OBD STATUS for DTC P0133 in the DTCs MENU with the HDS. Does the screen indicates PASSED? YES - Troubleshooting is complete. 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 and recheck.

DTC P0134: A/F Sensor (Sensor 1) Heater System Malfunction (2003-2004 models)

Note. If the vehicle was out of fuel and the engine stalled before this DTC was stored, refuel and clear the DTC with the HDS.

1. Check for a loose A/F sensor (Sensor 1). Is it loose in the exhaust pipe? YES - Reinstall the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ). NO - Go to step 2.
2. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
3. 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 2 minutes. Is DTC P0134 indicated? YES - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ). NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.

DTC P0134: A/F Sensor (Sensor 1) Heater System Malfunction (2005-2006 models)

Note. If DTC P0135 is stored at the same time as DTC P0134, troubleshoot DTC P0135 first, then recheck for DTC P0134.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0134 indicated? YES - Go to step 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
7. Turn the ignition switch ON (II).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
10. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0134 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1), the A/F sensor relay and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 11.
11. Monitor the OBD STATUS for DTC P0134 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 8 and recheck.

DTC P0135, P1166: A/F Sensor (Sensor 1) Heater Circuit Malfunction (2004 model); A/F Sensor (Sensor 1) Heater Circuit Malfunction (2002-2003 models)

Note. Information marked with an asterisk (*) applies to 2004 model. Information marked with double asterisk (* *) applies to 2002-2003 models.

Scheme 65

Scheme 66

Scheme 67

Scheme 68

Scheme 69

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Is DTC P0135* (P1166)* indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at C101 (located under the right side of the dash), C401 (located under middle of the dash), C402 (located under middle of the dash) the A/F sensor relay, the A/F sensor (Sensor 1) and the ECM/PCM.
3. Check these fuses: No. 14 OPTION (30 A) fuse in underhood fuse/relay box. No. 2 +B LAF HEATER (20 A) fuse in underdash fuse/relay box. No. 4 ACG (10 A) in underdash fuse/relay box. Are any of the fuses blown? YES - Repair short in the wire between the A/F sensor relay and the fuses. NO - Go to step 4.
4. Measure voltage between ECM/PCM connector terminals A1 and A24,30 seconds after the ignition switch is turned ON (II). Is there battery voltage? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Go to step 5.
5. Measure voltage between ECM/PCM connector terminals A22 and A24. Is there battery voltage? YES - Go to step 6. NO - Go to step 10 .
6. Turn the ignition switch OFF.
7. Disconnect ECM/PCM connector E (31P).
8. Turn the ignition switch ON (II).
9. Connect ECM/PCM connector terminal E8 to body ground with a jumper wire, then measure voltage between ECM/PCM connector terminals A1 and A24. Is there battery voltage? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair open or short in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A1).
10. Turn the ignition switch OFF.
11. Disconnect ECM/PCM connector A (31P) and the A/F sensor (Sensor 1) 4P connector.
12. Check for continuity between A/F sensor (Sensor 1) 4P connector terminal No. 3 and body ground. Is there continuity? YES - Repair short in the wire between the A/F sensor relay, the A/F sensor (Sensor 1), and the ECM/PCM (A22)." NO - Go to step 13.
13. Turn the ignition switch ON (II).
14. Measure voltage between ECM/PCM connector terminals E8 and A24. Is there battery voltage? YES - Repair open in the wire between the ECM/PCM (A22) and the A/F sensor (Sensor 1). NO - Go to step 15.
15. Check for continuity in the wires between the A/F sensor and the fuses. Is there continuity? YES - The wires are OK. Replace the A/F sensor relay. NO - Repair open in the wire between the A/F sensor relay and the fuses.

Scheme 70

Scheme 71

Scheme 72

Scheme 73

Scheme 74

Scheme 75

Scheme 76

Scheme 77

Scheme 78

Scheme 79

Scheme 80

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0135 indicated? YES - Go to step 5. NO - Intermittent failure, 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 and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Check these fuses: No. 14 OPTION (30 A) fuse in underhood fuse/relay box. No. 2 +B LAF (A/F) HEATER (20 A) fuse in underdash fuse/relay box. No. 4 ACG (10 A) fuse in underdash fuse/relay box. Are any of the fuses blown? YES - Repair short in the wire between the A/F sensor relay and the fuses, then go to step 25 . NO - Go to step 7.
7. Disconnect the A/F sensor (Sensor 1) 4P connector.
8. At the A/F sensor side, measure resistance between A/F sensor (Sensor 1) 4P connector terminals No. 3 and No. 4. Is there 2.1-2.9° at room temperature? YES - Go to step 9. NO - Go to step 24 .
9. At the A/F sensor side, check for continuity between A/F sensor (Sensor 1) 4P connector terminal No. 2 and A/F sensor (Sensor 1) 4P connector terminals No. 3 and No. 4 individually. Is there continuity? YES - Go to step 24 . NO - Go to step 10.
10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector A (31P).
12. 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 25 . NO - Go to step 13.
13. Connect A/F sensor (Sensor 1) 4P connector terminal No. 4 to body ground with a jumper wire.
14. 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 25 .
15. Remove the A/F sensor relay (A).
16. Check the A/F sensor relay (see «POWER RELAY TEST»(/acura/rsx/i-2001-2004/remont/body-electrical/#relays__power-relay-test) ). Is the A/F sensor relay OK? YES - Go to step 17. NO - Replace the A/F sensor relay, then go to step 25 .
17. Connect A/F sensor (Sensor 1) 4P connector terminal No. 3 to body ground with a jumper wire.
18. Check for continuity between A/F sensor relay 4P connector terminal No. 1 and body ground. Is there continuity? YES - Go to step 19. NO - Repair open in the wire between the A/F sensor (Sensor 1) and the A/F sensor relay, then go to step 25 .
19. Disconnect ECM/PCM connector E (31P).
20. Check for continuity between ECM/PCM connector terminal E8 and A/F sensor relay 4P connector terminal No. 3. Is there continuity? YES - Go to step 21. NO - Repair open in the wire between the ECM/PCM (E8) and the A/F sensor relay, then go to step 25 .
21. Measure voltage between A/F sensor relay 4P connector terminal No. 2 and body ground. Is there battery voltage? YES - Go to step 22. NO - Repair open in the wire between the A/F sensor relay and the No. 2 +B LAF (A/F) HEATER (20 A) fuse, then go to step 25 .
22. Turn the ignition switch ON (II).
23. Measure voltage between A/F sensor relay 4P connector terminal No. 4 and body ground. Is there battery voltage? YES - Go to step 31 . NO - Repair open in the wire between the A/F sensor relay and the No. 4 ACG (10 A) fuse, then go to step 25 .
24. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
25. Reconnect all connectors.
26. Turn the ignition switch ON (II).
27. Reset the ECM/PCM with the HDS.
28. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
29. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0135 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 30.
30. Monitor the OBD STATUS for DTC P0135 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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, go to step 28 and recheck.
31. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
32. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0135 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1), and the A/F sensor relay and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 81

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on.
3. Check the secondary HO2S (Sensor 2) output voltage with a scan tool or the HDS. Does the voltage stay at 0.3 V or less? YES - Go to step 4. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at C401 (located under middle of dash), C101 (located under middle of dash), the secondary HO2S (Sensor 2), and the ECM/PCM.
4. Turn the ignition switch OFF.
5. Disconnect the secondary HO2S (Sensor 2) 4P connector.
6. Start the engine.
7. Check the secondary HO2S (Sensor 2) output voltage with a scan tool or the HDS. Does the voltage stay at 0.3 V or less? YES - Go to step 8. NO - Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
8. Turn the ignition switch OFF.
9. Disconnect ECM/PCM connector A (32P).
10. 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 (E2) and the secondary HO2S (Sensor 2). NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 82

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. 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, system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Disconnect the secondary HO2S (Sensor 2) 4P connector.
7. Turn the ignition switch ON (II).
8. 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 .
9. Turn the ignition switch OFF.
10. Jump the SCS line with the HDS.
11. Disconnect ECM/PCM connector E (31P).
12. 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 .
13. Turn the ignition switch OFF.
14. Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
15. Reconnect all connectors.
16. Turn the ignition switch ON (II).
17. Reset the ECM/PCM with the HDS.
18. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
19. 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.
20. Test-drive under these conditions: Engine coolant temperature above 176°F (80°C) A/T in D position (M/T in 4th gear) Engine speed at 1,500-3,000 RPM Drive 1 minute or more
21. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0137 is indicated, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 22.
22. Monitor the OBD STATUS for DTC P0137 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 and recheck.
23. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
24. 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.
25. Test-drive under these conditions: Engine coolant temperature above 176°F (80°C) A/T in D position (M/T in 4th gear) Engine speed at 1,500-3,000 RPM Drive 1 minute or more
26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0137 is indicated, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 83

Scheme 84

Scheme 85

Scheme 86

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on.
3. Check the secondary HO2S (Sensor 2) output voltage at 3,000 RPM with a scan tool or the HDS. Does the voltage stay at 1.0 V or more? YES - Go to step 4. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2), and the ECM/PCM.
4. Turn the ignition switch OFF.
5. Disconnect the secondary HO2S (Sensor 2) 4P connector.
6. Connect secondary HO2S (Sensor 2) 4P connector terminals No. 1 and No. 2 with a jumper wire.
7. Turn the ignition switch ON (II).
8. Check the secondary HO2S (Sensor 2) output voltage with a scan tool or the HDS. Is there 0.9 V or more? YES - Go to step 9. NO - Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
9. Turn the ignition switch OFF.
10. Connect ECM/PCM connector terminals E2 and E4 with a jumper wire.
11. Turn the ignition switch ON (II).
12. Check the secondary HO2S (Sensor 2) output voltage with a scan tool or the HDS. Is there 0.9 V or more? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Go to step 13.
13. Turn the ignition switch OFF.
14. Remove the jumper wire.
15. Disconnect ECM/PCM connector E (31P).
16. Connect secondary HO2S (Sensor 2) 4P connector terminal No. 2 to body ground with a jumper wire.
17. Check for continuity between ECM/PCM connector terminal E2 and body ground. Is there continuity? YES - Repair open in the wire between the ECM/PCM (E4) and the secondary HO2S (Sensor 2). NO - Repair open in the wire between the ECM/PCM (E2) and the secondary HO2S (Sensor 2).

Scheme 87

Scheme 88

Scheme 89

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. 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, system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Disconnect the secondary HO2S (Sensor 2) 4P connector.
7. Connect secondary HO2S (Sensor 2) 4P connector terminals No. 1 and No. 2 with a jumper wire.
8. Turn the ignition switch ON (II).
9. 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 .
10. Turn the ignition switch OFF.
11. Remove the jumper wire from the secondary HO2S (Sensor 2) 4P connector.
12. Connect secondary HO2S (Sensor 2) 4P connector terminal No. 2 to body ground with a jumper wire.
13. Turn the ignition switch ON (II).
14. 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 .
15. Turn the ignition switch OFF.
16. Jump the SCS line with the HDS.
17. Disconnect ECM/PCM connector E (31P).
18. 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 .
19. Turn the ignition switch OFF.
20. Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
21. Reconnect all connectors.
22. Turn the ignition switch ON (II).
23. Reset the ECM/PCM with the HDS.
24. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
25. 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.
26. Test-drive under these conditions: Engine coolant temperature above 176°F (80°C) A/T in D position (M/T in 4th gear) Engine speed at 1,500-3,000 RPM Drive 1 minute or more
27. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0138 is indicated, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 28.
28. Monitor the OBD STATUS for DTC P0138 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 and recheck.
29. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
30. 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.
31. Test-drive under these conditions: Engine coolant temperature above 176°F (80°C) A/T in D position (M/T in 4th gear) Engine speed at 1,500-3,000 RPM Drive 1 minute or more
32. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0138 is indicated, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0139: Secondary HO2S (Sensor 2) Slow Response (2002-2004 models)

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on.
3. Check the secondary HO2S (Sensor 2) output voltage at 3,000 RPM with a scan tool or the HDS. Does the voltage stay within 0.3-0.8 V for 2 minutes? YES - Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ). NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2), and the ECM/PCM.

DTC P0139: Secondary HO2S (Sensor 2) Slow Response (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 4th gear) Vehicle speed at 35 mph (56 km/h) or more Drive about 20 seconds
5. 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, system is OK at this time. 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.
6. Turn the ignition switch OFF.
7. Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
8. Turn the ignition switch ON (II).
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
11. 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.
12. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 4th gear) Vehicle speed at 35 mph (56 km/h) or more Drive about 20 seconds
13. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0139 is indicated, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 14.
14. Monitor the OBD STATUS for DTC P0139 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 and recheck.

Scheme 90

Scheme 91

Scheme 92

Scheme 93

Scheme 94

Scheme 95

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Is DTC P0141 indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the secondary HO2S (Sensor 2) 4P connector.
5. At the secondary HO2S (Sensor 2) side, measure resistance between secondary HO2S (Sensor 2) 4P connector terminals No. 3 and No. 4. Is there 10-40 ohms? YES - Go to step 6. NO - Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
6. Check for continuity between body ground and secondary HO2S (Sensor 2) 4P connector terminals No. 3 and No. 4 individually. Is there continuity? YES - Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ). NO - Go to step 7.
7. Turn the ignition switch ON (II).
8. Measure voltage between secondary HO2S (Sensor 2) 4P connector terminals No. 3 and No. 4. Is there battery voltage? YES - Go to step 9. NO - Go to step 12 .
9. Turn the ignition switch OFF.
10. Disconnect ECM/PCM connector E (31P).
11. Check for continuity between ECM/PCM connector terminal E6 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (E6) and the secondary HO2S (Sensor 2). NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
12. Measure voltage between secondary HO2S (Sensor 2) 4P connector terminal No. 4 and body ground. Is there battery voltage? YES - Go to step 13. NO - Check the No. 4 ACG (10 A) fuse in the underdash fuse/relay box. If the fuse is OK, repair open in the wire between the secondary HO2S (Sensor 2) and the No. 4 ACG (10 A) fuse.
13. Turn the ignition switch OFF.
14. Reconnect the secondary HO2S (Sensor 2) 4P connector.
15. Disconnect ECM/PCM connector E (31P).
16. Turn the ignition switch ON (II).
17. Measure voltage between ECM/PCM connector terminals A5 and E6. Is there 0.1 V or less? YES - Repair open in the wire between the ECM/PCM (E6) and the secondary HO2S (Sensor 2). NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 96

Scheme 97

Scheme 98

Scheme 99

Scheme 100

Scheme 101

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0141 indicated? YES - Go to step 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM.
5. Check the No. 4 ACG (10 A) fuse in the underdash fuse/relay box. Is the fuse OK? YES - Go to step 6. NO - Repair short in the wire between the secondary HO2S (Sensor 2) and the No. 4 ACG (10 A) fuse, then go to step 24 .
6. Turn the ignition switch OFF.
7. Disconnect the secondary HO2S (Sensor 2) 4P connector.
8. At the secondary HO2S (Sensor 2) side, measure resistance between secondary HO2S (Sensor 2) 4P connector terminals No. 3 and No. 4. Is there 5.0-6.4° at room temperature? YES - Go to step 9. NO - Go to step 23 .
9. 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 23 . NO - Go to step 10.
10. Turn the ignition switch ON (II).
11. On the harness side, 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 .
12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect ECM/PCM connector E (31P).
15. 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 24 . NO - Go to step 29 .
16. 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 - Check the No. 4 ACG (10 A) fuse in the underdash fuse/relay box. If the fuse is OK, repair open in the wire between the secondary HO2S (Sensor 2) and the No. 4 ACG (10 A) fuse, then go to step 24 .
17. Turn the ignition switch OFF.
18. Jump the SCS line with the HDS.
19. Reconnect the secondary HO2S (Sensor 2) 4P connector.
20. Disconnect ECM/PCM connector E (31P).
21. Turn the ignition switch ON (II).
22. Measure voltage between ECM/PCM connector terminals A5 and E21. Is there 0.1 V or less? YES - Repair open in the wire between the ECM/PCM (E21) and the secondary HO2S (Sensor 2), then go to step 24 . NO - Go to step 30 .
23. Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
24. Reconnect all connectors.
25. Turn the ignition switch ON (II).
26. Reset the ECM/PCM with the HDS.
27. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
28. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0141 is indicated, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 29.
29. Monitor the OBD STATUS for DTC P0141 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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, go to step 27 and recheck.
30. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
31. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0141 is indicated, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Special Tools Required

Vacuum pump/gauge, 0-30 in.Hg, Snap-on YA4000A or equivalent, commercially available

Note. If some of the DTCs listed below are stored 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

P1166, P1167 *1 , P0135 *2 : A/F sensor (Sensor 1) heater

P0137, P0138: Secondary HO2S (Sensor 2)

P0141: Secondary HO2S (Sensor 2) heater

P0340, P0344: CMP sensor A

P1259, P2646 *2 , P2647 *2 : VTEC system

*1: 2002 model

*2: 2004 model

Scheme 102

1. Check the fuel pressure (see «FUEL PRESSURE TEST»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-test) ). Is the fuel pressure OK? YES - Go to step 2. NO - Check these items: If the pressure is too high, replace the fuel pressure regulator (see «FUEL PRESSURE REGULATOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ). If the pressure is too low, check the fuel pump, the fuel feed pipe, and the fuel filter, and replace the fuel pressure regulator (see «FUEL PRESSURE REGULATOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ).
2. Turn the ignition switch OFF.
3. With the vacuum pump/gauge, 0-30 in.Hg,, apply vacuum to the evaporative emission (EVAP) canister purge valve (A) from the intake manifold side. Does it hold vacuum? YES - Check the valve clearances and adjust if necessary. If the valve clearances are OK, replace the injectors (see «INJECTOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Replace the EVAP canister purge valve (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).

DTC P0171, P0172: Fuel System Too Lean (2005-2006 models); Fuel System Too Rich (2005-2006 models)

Note. If some of the DTCs listed below are stored 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, 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: Secondary HO2S (Sensor 2)

P0141: Secondary HO2S (Sensor 2) heater

P2646, P2647, P2648, P2649: VTEC system

P2279: Intake air leakage

1. Check the fuel pressure (see «FUEL PRESSURE TEST»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-test) ). Is the fuel pressure OK? YES - Check the engine valve clearances and adjust if necessary. If the valve clearances are OK, replace the injectors (see «INJECTOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 2. NO - Check the fuel pressure (see «FUEL PRESSURE TEST»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-test) ). If the pressure is too high, replace the fuel pressure regulator (see «FUEL PRESSURE REGULATOR REPLACEMENT»(/acura/rsx/i-2001-2004/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.
2. Turn the ignition switch ON (II).
3. Reset the ECM/PCM with the HDS.
4. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
5. 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.
6. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 5th gear) Drive at a steady speed between 15-75 mph (24-120 km/h) NOTE: DTC P0171, P0172, P0174, and/or P0175 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 long term fuel trim/air fuel feed back average stays within 0.81-1.17, there is no problem at this time.
7. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0171 or P0172 is indicated, go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.

DTC P0300, P0301, P0302, P0303, P0304: Random Misfire Detected and Any Combination of the Following: (2002-2004 models); No. 1-4 Cylinder Misfire Detected (2002-2004 models)

Note. If the misfiring is frequent enough to trigger detection of increased emissions during two consecutive driving cycles, the MIL will come on, and DTC P0300 (and some combination of P0301 through P0304) will be stored. If the misfiring is frequent enough to damage the catalyst, the MIL will blink whenever the misfiring occurs, and DTC P0300 (and some combination of P0301 through P0304) will be stored. When the misfiring stops, the MIL will remain on.

1. Troubleshoot the following DTCs first if any of them were stored along with the random misfire DTC(s): P0107, P0108, P1128, P1129: Manifold absolute pressure (MAP) sensor P0171, P0172: Fuel system P0335, P0336 (P0339)*: Crankshaft position (CKP) sensor P0505 (P0506, P0507)*: Idle control system P1259 (P2646, P2647)*: VTEC system P1361, P1362 (P0365, P0369)*: Camshaft position (CMP) sensor B P1519 (P0511)*: Idle air control (IAC) valve *: 2004 model
2. Test-drive the vehicle to verify the symptom.
3. Find the symptom in the chart below, and do the related procedures and checks, in the order listed, until you find the cause. SYMPTOM CHART Symptom Procedure(s) Also check for: Random misfire only at low RPM and under load Check fuel pressure (see «FUEL PRESSURE TEST»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-test) ). Low compression. Low quality fuel. Random misfire only during acceleration Check fuel pressure (see «FUEL PRESSURE TEST»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-test) ). Malfunction in the VTEC system (see «VTEC ROCKER ARM TEST»(/acura/rsx/i-2001-2004/remont/mechanical/#cylinder-head__vtec-rocker-arm-test) ). Random misfire at high RPM, under load, or under random conditions Check fuel pressure (see «FUEL PRESSURE TEST»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-test) ). Correct valve clearance (see «VALVE CLEARANCE ADJUSTMENT»(/acura/rsx/i-2001-2004/remont/mechanical/#cylinder-head__valve-clearance-adjustment) ).

1. Pressure gauge adaptor 07NAJ-P07010A
2. A/T low pressure gauge w/panel 07406-0070300
3. A/T pressure hose 07406-0020201
4. A/T pressure hose, 2,210 mm 07MAJ-PY4011A
5. A/T pressure hose, adapter 07MAJ-PY40120
6. Oil pressure hose 07ZAJ-S5A0200

Note. 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. Troubleshoot the following DTCs first, if any of them were stored along with the random misfire DTC(s)

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 103

1. Record all freeze data and on-board snapshots with the HDS.
2. Clear the DTC with the HDS.
3. Start the engine (in Park or neutral), then let it idle without load.
4. 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.
5. 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.
6. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed Throttle position CLV (calculated load value) Gear position
7. 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.
8. 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, system is OK at this time.
9. Turn the ignition switch OFF.
10. 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 .
11. Inspect the spark plugs (see «SPARK PLUG INSPECTION»(/acura/rsx/i-2001-2004/remont/ignition-system/#ignition-system) ). If the spark plugs are fouled or worn, replace them.
12. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed Throttle position CLV (calculated load value) Gear position
13. 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 .
14. Check the fuel pressure (see «FUEL PRESSURE TEST»(/acura/rsx/i-2001-2004/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/rsx/i-2001-2004/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/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system) ), then go to step 20 .
15. Turn the ignition switch OFF.
16. 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) (A) in the pressure gauge adapter (B). NOTE: Install the switch in the reverse order of removal with a new O-ring.
17. Reconnect the rocker arm oil pressure switch (VTEC oil pressure switch) 2P connector.
18. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on.
19. 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 the fuel pressure (see «FUEL PRESSURE TEST»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-test) ), and repair as needed, then go to step 20. NO - Inspect the VTEC system, then go to step 20.
20. Turn the ignition switch ON (II).
21. Reset the ECM/PCM with the HDS.
22. Clear the CKP pattern with the HDS.
23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
24. Do the CKP pattern learn procedure (see «ECM/PCM RESET (2005-2006 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2005-2006-models) ).
25. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed Throttle position CLV (calculated load value) Gear position
26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0300, P0301, P0302, P0303, or P0304 are indicated, check for poor connections or loose terminals at the ignition coil, the injector, and the ECM/PCM, then go to troubleshooting DTC P0301, P0302, P0303, or P0304 (see «DTC P0301: NO. 1 CYLINDER MISFIRE DETECTED (2002-2004 MODELS); DTC P0302: NO. 2 CYLINDER MISFIRE DETECTED (2002-2004 MODELS); DTC P0303: NO. 3 CYLINDER MISFIRE DETECTED (2002-2004 MODELS); DTC P0304: NO. 4 CYLINDER MISFIRE DETECTED (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 27.
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. 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 and recheck.

Scheme 104

Scheme 105

Scheme 106

Scheme 107

Scheme 108

Scheme 109

Scheme 110

Scheme 111

Scheme 112

Scheme 113

Scheme 114

1. After checking and recording the freeze data, reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ). If there is no freeze data of the misfire, just clear the DTC.
2. Start the engine, and listen for a clicking sound at the injector of the problem cylinder. Does it click? YES - Go to step 3. NO - Go to step 26 .
3. Turn the ignition switch OFF, and reset the ECM/PCM.
4. Exchange the ignition coil from the problem cylinder with one from another cylinder.
5. Test-drive the vehicle several times in the range of the freeze data or under various conditions if there was no freeze data.
6. Check for a DTC or a Temporary DTC with a scan tool or the HDS. Is DTC or Temporary DTC P0301, P0302, P0303 or P0304 indicated? YES - Go to step 7. NO - Intermittent misfire due to poor contact at the ignition coil connector (no misfire at this time).
7. Determine which cylinder(s) had the misfire. Does the misfire occur in the cylinder where the ignition coil was exchanged? YES - Replace the faulty ignition coil. NO - Go to step 8.
8. Turn the ignition switch OFF, and reset the ECM/PCM.
9. Exchange the spark plug from the problem cylinder with one from another cylinder.
10. Test-drive the vehicle several times in the range of the freeze data or under various conditions if there was no freeze data.
11. Check for a DTC or a Temporary DTC with a scan tool or the HDS. Is DTC or Temporary DTC P0301, P0302, P0303 or P0304 indicated? YES - Go to step 12. NO - Intermittent misfire due to spark plug fouling (no misfire at this time).
12. Determine which cylinder(s) had the misfire. Does the misfire occur in the cylinder where the spark plug was exchanged? YES - Replace the faulty spark plug. NO - Go to step 13.
13. Turn the ignition switch OFF, and reset the ECM/PCM.
14. Exchange the injector from the problem cylinder with one from the another cylinder.
15. Let the engine idle for 2 minutes.
16. Test-drive the vehicle several times in the range of the freeze data or under various conditions if there was no freeze data.
17. Check for a DTC or a Temporary DTC with a scan tool or the HDS. Is DTC or Temporary DTC P0301, P0302, P0303 or P0304 indicated? YES - Go to step 18. NO - Intermittent misfire due to bad contact at the injector connector (no misfire at this time).
18. Determine which cylinder(s) had the misfire. Does the misfire occur in the cylinder where the injector was exchanged? YES - Replace the faulty injector (see «INJECTOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Go to step 19.
19. Turn the ignition switch OFF.
20. Disconnect the ignition coil 3P connector from the problem cylinder.
21. Turn the ignition switch ON (II).
22. Measure voltage between ignition coil 3P connector terminal No. 3 and body ground. Is there battery voltage? YES - Go to step 23. NO - Repair open or short in the wire between the No. 1 IGN COIL (15 A) fuse and the ignition coil.
23. Turn the ignition switch OFF.
24. Check for continuity between ignition coil 3P connector terminal No. 2 and body ground. Is there continuity? YES - Go to step 25. NO - Repair open in the wire between the ignition coil and G101.
25. Disconnect ECM/PCM connector A (31P).
26. Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). TERMINALS REFERENCE PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOR No. 1 P0301 A30 YEL/GRN No. 2 P0302 A29 BLU/RED No. 3 P0303 A28 WHT/BLU No. 4 P0304 A27 BRN Is there continuity? YES - Repair short in the wire between the ECM/PCM and the ignition coil. NO - Go to step 27.
27. Connect the appropriate ignition coil 3P connector terminal No. 1 and body ground with a jumper wire (see table). TERMINALS 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
28. Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM TERMINAL REFERENCE PROBLEM CYLINDER DTC ECM/PCM TERMINAL WIRE COLOR No. 1 P0301 A30 YEL/GRN No. 2 P0302 A29 BLU/RED No. 3 P0303 A28 WHT/BLU No. 4 P0304 A27 BRN Is there continuity? YES - Go to step 29. NO - Repair open in the wire between the ECM/PCM and the ignition coil.
29. Do an engine compression and a cylinder leakdown test. Did the engine pass both tests? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair the engine.
30. Disconnect ECM/PCM connector B (24P).
31. Turn the ignition switch ON (II).
32. Measure voltage between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM TERMINAL 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 33. NO - Go to step 33 .
33. Turn the ignition switch OFF.
34. Disconnect the injector 2P connector from the problem cylinder.
35. Measure resistance between injector 2P connector terminals No. 1 and No. 2. Is there 10-13 ohms YES - Go to step 36. NO - Replace the injector (see «INJECTOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
36. Exchange the injector from the problem cylinder with one from another cylinder.
37. Reset the ECM/PCM.
38. Let the engine idle for 2 minutes.
39. Test-drive the vehicle several times in the range of the freeze data or under various conditions if there was no freeze data.
40. Check for a DTC or a Temporary DTC with a scan tool or the HDS. Is DTC or Temporary DTC P0301, P0302, P0303, or P0304 indicated? YES - Go to step 41. NO - Intermittent misfire due to injector malfunction.
41. Determine which cylinder(s) had the misfire. Does the misfire occur in the cylinder where the injector was exchanged? YES - Replace the faulty injector. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
42. Turn the ignition switch OFF.
43. Disconnect the injector 2P connector from the problem cylinder.
44. Turn the ignition switch ON (II).
45. Measure voltage between injector 2P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 46. NO - Repair open in the wire between the injector and the PGM-FI main relay.
46. Turn the ignition switch OFF.
47. Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM TERMINAL 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 - Repair short in the wire between the ECM/PCM and the injector. NO - Go to step 48.
48. Connect appropriate injector 2P connector terminal No. 2 to body ground with a jumper wire (see table). TERMINAL REFERENCE PROBLEM CYLINDER DTC WIRE COLOR No. 1 P0301 BRN No. 2 P0302 RED No. 3 P0303 BLU No. 4 P0304 YEL
49. Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM TERMINAL 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 - Replace the injector (see «INJECTOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then recheck. NO - Repair open in the wire between the ECM/PCM and the injector.

Scheme 115

Scheme 116

Scheme 117

Scheme 118

Scheme 119

Scheme 120

Scheme 121

Scheme 122

Scheme 123

Scheme 124

Scheme 125

1. Record all freeze data and on-board snapshots with the HDS.
2. Clear the DTC with the HDS.
3. Start the engine (in Park or neutral), then let it idle without load.
4. 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.
5. 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.
6. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed Throttle position CLV (calculated load value) Gear position
7. 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.
8. 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, system is OK at this time.
9. Turn the ignition switch OFF.
10. Remove the intake manifold cover (see step 1 on «REMOVAL - K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/exhaust/#intake-manifold-and-exhaust-system) ).
11. 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 27 .
12. Turn the ignition switch OFF.
13. Exchange the ignition coil from the problem cylinder with one from another cylinder.
14. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed Throttle position CLV (calculated load value) Gear position
15. 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.
16. 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/rsx/i-2001-2004/remont/ignition-system/#ignition-system) ), then go to step 63 . NO - Go to step 17.
17. Turn the ignition switch OFF.
18. Exchange the spark plug from the problem cylinder with one from another cylinder.
19. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed Throttle position CLV (calculated load value) Gear position
20. 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).
21. 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 63 . NO - Go to step 22.
22. Turn the ignition switch OFF.
23. Exchange the injector from the problem cylinder with one from another cylinder.
24. Start the engine, and let it idle for 2 minutes.
25. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed Throttle position CLV (calculated load value) Gear position
26. 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.
27. 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 63 . NO - Go to step 28.
28. Turn the ignition switch OFF.
29. Disconnect the ignition coil 3P connector from the problem cylinder.
30. Turn the ignition switch ON (II).
31. 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 63 .
32. Turn the ignition switch OFF.
33. 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 63 .
34. Turn the ignition switch OFF.
35. Jump the SCS line with the HDS.
36. Disconnect ECM/PCM connector A (31P).
37. Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM TERMINAL 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 63 . NO - Go to step 38.
38. Connect appropriate ignition coil 3P connector terminal No. 1 to body ground with a jumper wire (see table). TERMINAL 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
39. Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM TERMINAL 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 63 .
40. Reconnect the ignition coil 3P connector and ECM/PCM connector A (31P).
41. Do an engine compression and a cylinder leakdown test. Did the engine pass both tests? YES - Go to step 42. NO - Repair the engine, then go to step 63 .
42. Do the VTEC rocker arm test (see «VTEC ROCKER ARM TEST»(/acura/rsx/i-2001-2004/remont/mechanical/#cylinder-head__vtec-rocker-arm-test) ). Did the VTEC rocker arm pass the test? YES - Go to step 72 . NO - Repair as necessary, then go to step 63 .
43. Turn the ignition switch OFF.
44. Jump the SCS line with the HDS.
45. Disconnect ECM/PCM connector B (24P).
46. Turn the ignition switch ON (II).
47. Measure voltage between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM TERMINAL 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 57 . NO - Go to step 48.
48. Turn the ignition switch OFF.
49. Remove the intake manifold cover (see step 1 on «REMOVAL - K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/exhaust/#intake-manifold-and-exhaust-system) ).
50. Disconnect the injector 2P connector from the problem cylinder.
51. Turn the ignition switch ON (II).
52. Measure voltage between injector 2P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 53. NO - Repair open in the wire between the injector and the PGM-FI main relay, then go to step 63 .
53. Turn the ignition switch OFF.
54. Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM TERMINAL 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 - Repair short in the wire between the ECM/PCM and the injector, then go to step 63 . NO - Go to step 55.
55. Connect appropriate injector 2P connector terminal No. 2 to body ground with a jumper wire (see table). TERMINAL REFERENCE PROBLEM CYLINDER DTC WIRE COLOR No. 1 P0301 BRN No. 2 P0302 RED No. 3 P0303 BLU No. 4 P0304 YEL
56. Check for continuity between body ground and the appropriate ECM/PCM connector terminal (see table). ECM/PCM TERMINAL 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 57. NO - Repair open in the wire between the ECM/PCM and the injector, then go to step 63 .
57. Measure resistance between injector 2P connector terminals No. 1 and No. 2. Is there 10-13 ohms ? YES - Go to step 58. NO - Replace the injector (see «INJECTOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 63 .
58. Substitute a known-good injector from another cylinder to the problem cylinder.
59. Reconnect ECM/PCM connector B (24P).
60. Start the engine, and let it idle for 2 minutes.
61. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed Throttle position CLV (calculated load value) Gear position
62. 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 72 . NO - Replace the original injector (see «INJECTOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 63 .
63. Reconnect all connectors.
64. Turn the ignition switch ON (II).
65. Reset the ECM/PCM with the HDS.
66. Clear the CKP pattern with the HDS.
67. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
68. Do the CKP pattern learn procedure (see «ECM/PCM RESET (2005-2006 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2005-2006-models) ).
69. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed Throttle position CLV (calculated load value) Gear position
70. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0301, P0302, P0303, or P0304 are indicated, check for poor connections or loose terminals at the ignition coil, the injector, and the ECM/PCM, then go to troubleshooting DTC P0300, P0301, P0302, P0303, or P0304 (see «DTC P0300: RANDOM MISFIRE DETECTED AND ANY COMBINATION OF THE FOLLOWING: (2005-2006 MODELS); DTC P0301: NO. 1 CYLINDER MISFIRE DETECTED (2005-2006 MODELS); DTC P0302: NO. 2 CYLINDER MISFIRE DETECTED (2005-2006 MODELS); DTC P0303: NO. 3 CYLINDER MISFIRE DETECTED (2005-2006 MODELS); DTC P0304: NO. 4 CYLINDER MISFIRE DETECTED (2005-2006 MODELS)»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 71.
71. 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. 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 69 and recheck.
72. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
73. Test-drive the vehicle for several minutes in the range of the recorded freeze data.
74. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0301, P0302, P0303, or P0304 are indicated, check for poor connections or loose terminals at the injector, the ignition coil, and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0325: Knock Sensor Circuit Malfunction (2002-2004 models)

Note. Information marked with * 1 applies to K20A3 engine; * 2 applies to K20A2 engine.

Scheme 126

Scheme 127

Scheme 128

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
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.
3. Hold the engine speed at 3,000-4,000 RPM for at least 10 seconds. Is DTC P0325 indicated? YES - Go to step 4. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the knock sensor and the ECM/PCM.
4. Turn the ignition switch OFF.
5. Disconnect the starter subharness 8P *1 (6P) *2 connector.
6. Check for continuity between ECM/PCM connector terminal A9 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (A9) and the starter subharness 8P *1 (6P) *2 connector. NO - Go to step 7.
7. Connect engine wire harness 8P *1 (6P) *2 connector terminal No. 7 *1 (No. 5) *2 to body ground with a jumper wire.
8. Check for continuity between body ground and ECM/PCM connector terminal A9. Is there continuity? YES - Go to step 9. NO - Repair open in the wire between the ECM/PCM (A9) and the starter subharness 8P *1 (6P) *2 connector.
9. Check the starter subharness between 8P *1 (6P) *2 connector and the knock sensor for an open or short. If it's OK, substitute a known-good knock sensor and recheck. Is DTC P0325 indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Replace the original knock sensor and/or starter subharness, K20A2 engine (see «KNOCK SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), K20A3 engine (see «KNOCK SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 129

Scheme 130

Scheme 131

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Hold the engine speed at 3,000-4,000 RPM for at least 10 seconds.
5. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0325 indicated? YES - Go to step 6. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the knock sensor and the ECM/PCM.
6. Turn the ignition switch OFF.
7. Jump the SCS line with the HDS.
8. Disconnect the knock sensor 1P connector.
9. Disconnect ECM/PCM connector A (31P).
10. 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.
11. Connect the knock sensor 1P connector terminal to body ground with a jumper wire.
12. 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 .
13. Replace the knock sensor, K20Z1 engine (see «KNOCK SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), K20A3 engine (see «KNOCK SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
14. Reconnect all connectors.
15. Turn the ignition switch ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
18. Hold the engine speed at 3,000-4,000 RPM for at least 10 seconds.
19. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - Go to step 21 . NO - Go to step 20.
20. Monitor the OBD STATUS for DTC P0325 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates NOT COMPLETED, go to step 17 and recheck.
21. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
22. Hold the engine speed at 3,000-4,000 RPM for at least 10 seconds.
23. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0325 is indicated, check for poor connections or loose terminals at the knock sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0335, P0336, P0339: CKP Sensor No Signal (2002-2004 models; CKP Sensor Circuit Intermittent Interruption (2002-2003 models); CKP Sensor Circuit Intermittent Interruption (2004 model)

Note. Information marked with an asterisk (*) applies to 2002-2004 models. Information marked with double asterisk (**) applies to 2002-2003 models. Information marked with triple asterisk (***) applies to 2004 model.

Scheme 132

Scheme 133

Scheme 134

Scheme 135

Scheme 136

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Is DTC P0335* and/or (P0336)** (P0339)*** indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the CKP sensor and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the CKP sensor 3P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between CKP sensor 3P connector terminal No. 3 and body ground. Is there battery voltage? YES - Go to step 7. NO - Repair open in the wire between PGM-FI main relay 1 and the CKP sensor.
7. Measure voltage between CKP sensor 3P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to step 8. NO - Go to step 10 .
8. Measure voltage between CKP sensor 3P connector terminals No. 2 and No. 3. Is there battery voltage? YES - Go to step 9. NO - Repair open in the wire between the CKP sensor and G101.
9. Substitute a known-good CKP sensor and recheck. Is DTC P0335* and/or (P0336)** (P0339)*** indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Replace the original CKP sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
10. 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. NO - Go to step 11.
11. Turn the ignition switch OFF.
12. Disconnect ECM/PCM connector A (31P).
13. 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. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 137

Scheme 138

Scheme 139

Scheme 140

Scheme 141

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0335 indicated? YES - Go to step 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the CKP sensor and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Disconnect the CKP sensor 3P connector.
7. Turn the ignition switch ON (II).
8. Measure voltage between CKP sensor 3P connector terminal No. 3 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 19 .
9. Measure voltage between CKP sensor 3P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to step 10. NO - Go to step 11 .
10. Measure voltage between CKP sensor 3P connector terminals No. 2 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 19 .
11. 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 19 . NO - Go to step 12.
12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect ECM/PCM connector A (31P).
15. 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 19 . NO - Go to step 26 .
16. Turn the ignition switch OFF.
17. Replace the CKP sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 19 .
18. Reconnect all connectors.
19. Turn the ignition switch ON (II).
20. Reset the ECM/PCM with the HDS.
21. Clear the CKP pattern with the HDS.
22. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
23. Do the CKP pattern learn procedure (see «ECM/PCM RESET (2005-2006 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2005-2006-models) ).
24. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0335 is indicated, check for poor connections or loose terminals at the CKP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
25. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0335 is indicated, check for poor connections or loose terminals at the CKP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0339: CKP Sensor Circuit Intermittent Interruption (2005-2006 models)

1. Record ail freeze data and on-board snapshots with the HDS.
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle for 10 seconds.
4. Check the CKP NOISE COUNT in the DATA LIST with the HDS. Are 0 counts indicated? YES - Go to step 6 . NO - Go to step 5.
5. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed
6. Check the CKP NOISE COUNT in the DATA LIST with the HDS. Are 0 counts indicated? YES - Go to step 7. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the CKP sensor and the ECM/PCM.
7. Check for poor or loose connections and terminals at the following: 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 9 .
8. Remove the cam chain case (see «CAM CHAIN REMOVAL»(/acura/rsx/i-2001-2004/remont/mechanical/#cylinder-head__cam-chain-removal) ), and check the CKP sensor pulse plate for damage. Is the pulse plate damaged? YES - Replace the CKP sensor pulse plate, then go to step 9 . NO - Go to step 9.
9. Turn the ignition switch OFF.
10. Replace the CKP sensor (see «CKP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
11. Turn the ignition switch ON (II).
12. Reset the ECM/PCM with the HDS.
13. Clear the CKP pattern with the HDS.
14. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
15. Do the CKP pattern learn procedure (see «ECM/PCM RESET (2005-2006 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2005-2006-models) ).
16. Start the engine, and let it idle for 10 seconds.
17. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0339 is indicated, check for poor connections or loose terminals at the CKP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.

DTC P0365, P0369, P1361, P1362: CMP Sensor B No Signal (2004 model); CMP Sensor B Circuit Intermittent Interruption (2004 model); CMP Sensor B Circuit Intermittent Interruption (2002-2003 models); CMP Sensor B No Signal (2002-2003 models)

Note. Information marked with an asterisk (*) applies to 2004 model. Information marked with double asterisk (**) applies to 2002-2003 models.

Scheme 142

Scheme 143

Scheme 144

Scheme 145

Scheme 146

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Is DTC P1361** (P0365)* and/or P1362** (P0369)* indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at CMP sensor B and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the CMP sensor B 3P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between CMP sensor B 3P connector terminal No. 3 and body ground. Is there battery voltage? YES - Go to step 7. NO - Repair open in the wire between PGM-FI main relay 1 (FI MAIN) and CMP sensor B.
7. Measure voltage between CMP sensor B 3P connector terminal No. 1 and body ground. Is there about 5 V? YES - Go to step 8. NO - Go to step 10 .
8. Measure voltage between CMP sensor B 3P connector terminals No. 2 and No. 3. Is there battery voltage? YES - Go to step 9. NO - Repair open in the wire between CMP sensor Band G101.
9. Substitute a known-good CMP sensor B and recheck. Is DTC P1361 ** (P0365)* and/or P1362** (P0369)* indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Replace original CMP sensor B (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
10. Measure voltage between ECM/PCM connector terminal A26 and body ground. Is there about 5 V? YES - Repair open in the wire between the ECM/PCM (A26) and CMP sensor B. NO - Go to step 11.
11. Turn the ignition switch OFF.
12. Disconnect ECM/PCM connector A (31P).
13. Check for continuity between ECM/PCM connector terminal A26 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (A26) and CMP sensor B. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 147

Scheme 148

Scheme 149

Scheme 150

Scheme 151

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0365 indicated? YES - Go to step 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at CMP sensor B and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Disconnect the CMP sensor B 3P connector.
7. Turn the ignition switch ON (II).
8. 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 .
9. 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 .
10. 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 .
11. 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.
12. Turn the ignition switch OFF.
13. Jump the SCS line with the HDS.
14. Disconnect ECM/PCM connector A (31P).
15. 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 24 .
16. Turn the ignition switch OFF.
17. Replace CMP sensor B (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
18. Reconnect all connectors.
19. Turn the ignition switch ON (II).
20. Reset the ECM/PCM with the HDS.
21. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
22. Start the engine.
23. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0365 is indicated, check for poor connections or loose terminals at CMP sensor B and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
24. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
25. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0365 is indicated, check for poor connections or loose terminals at CMP sensor B and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0369: CMP Sensor B Circuit Intermittent Interruption (2005-2006 models)

1. Record all freeze data and on-board snapshots with the HDS.
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle for 10 seconds.
4. Check the CMP NOISE B COUNT in the DATA LIST with the HDS. Are 0 counts indicated? YES - Go to step 7 . NO - Go to step 5.
5. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters: Engine speed Vehicle speed
6. Check the CMP NOISE B COUNT in the DATA LIST with the HDS. Are 0 counts indicated? YES - Go to step 7. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at CMP sensor B and the ECM/PCM.
7. 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 9 .
8. Check the CMP sensor B pulse plate for damage (see «CMP PULSE PLATE B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/mechanical/#cylinder-head) ). Is the pulse plate damaged? YES - Replace the CMP sensor B pulse plate (see «CMP PULSE PLATE B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/mechanical/#cylinder-head) ), then go to step 11. NO - Go to step 9.
9. Turn the ignition switch OFF.
10. Replace CMP sensor B (see «CMP SENSOR B REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
11. Turn the ignition switch ON (II).
12. Reset the ECM/PCM with the HDS.
13. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
14. Start the engine, and let it idle for 10 seconds.
15. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0369 is indicated, check for poor connections or loose terminals at CMP sensor B and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.

Scheme 152

Scheme 153

1. Test-drive the vehicle.
2. Check the vehicle speed with a scan tool or the HDS. Is the correct speed indicated? YES - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the VSS and the ECM. NO - Go to step 3.
3. Turn the ignition switch OFF.
4. Block the rear wheels and set the parking brake.
5. Raise the front of the vehicle, and make sure it is securely supported.
6. Turn the ignition switch ON (II).
7. Block the right front wheel, and slowly rotate the left front wheel.
8. Measure voltage between ECM connector terminals A18 and A24. Does the voltage pulse between 0 V and 5 V or battery voltage? YES - Update the ECM if it does not have the latest software, or substitute a known-good ECM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Go to step 9.
9. Turn the ignition switch OFF.
10. Disconnect ECM connector A (31P).
11. Turn the ignition switch ON (II).
12. Block the right front wheel, and slowly rotate the left front wheel.
13. Measure voltage between ECM connector terminals A18 and A24. Does the voltage pulse between 0 V and 5 V or battery voltage? YES - Update the ECM if it does not have the latest software, or substitute a known-good ECM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Check for a short or an open in the wire between the ECM (A18) and the VSS. If the wire is OK, test the VSS (see «VEHICLE SPEED SIGNAL CIRCUIT TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/gauges-instrument-panels/#gauges__vehicle-speed-signal-circuit-troubleshooting) ).

DTC P0562: Charging System Low Voltage (2005-2006 models)

Note. 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. If any high current load accessories are installed, this DTC can be set.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. 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
5. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
6. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0562 indicated? YES - Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/rsx/i-2001-2004/remont/charging-system/#charging-system) ), then go to step 7. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the alternator and the underhood fuse/relay box, and check the battery performance (see «BATTERY TEST»(/acura/rsx/i-2001-2004/remont/body-electrical/#battery) ).
7. Turn the ignition switch ON (II).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
10. Start the engine.
11. 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
12. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
13. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0562 is indicated, check for poor connections or loose terminals at the alternator and the underhood fuse/relay box, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.

Scheme 154

Scheme 155

Scheme 156

Scheme 157

Scheme 158

Scheme 159

Scheme 160

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Turn the ignition switch OFF.
3. Wait 5 seconds.
4. Turn the ignition switch ON (II). Is DTC P0563 indicated? YES - Go to step 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the No. 6 ECU (ECM/PCM) (15 A) fuse in the underhood fuse/relay box and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Disconnect ECM/PCM connector E (31P).
7. Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage? YES - Go to step 11 . NO - Go to step 8.
8. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ).
9. Remove PGM-FI main relay 1 (FI MAIN) (A).
10. 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). NO - Replace PGM-FI main relay 1 (FI MAIN).
11. Reconnect ECM/PCM connector E (31P).
12. Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage? YES - Go to step 13. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
13. Disconnect ECM/PCM connector A (31P).
14. Measure voltage between body ground and ECM/PCM connector terminals A3 and A2 individually. Is there battery voltage? YES - Go to step 15. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
15. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ).
16. Remove PGM-FI main relay 1 (FI MAIN) (A).
17. 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). NO - Replace PGM-FI main relay 1 (FI MAIN).

Scheme 161

Scheme 162

Scheme 163

Scheme 164

Scheme 165

Scheme 166

Scheme 167

Scheme 168

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF.
4. Wait 10 seconds.
5. Turn the ignition switch ON (II).
6. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0563 indicated? YES - Go to step 7. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the No. 6 ECU (ECM/PCM) (20 A) fuse in the underhood fuse/relay box, PGM-FI main relay 1 (FI MAIN), and the ECM/PCM.
7. Turn the ignition switch OFF.
8. Jump the SCS line with the HDS.
9. Disconnect ECM/PCM connector E (31P).
10. 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.
11. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ), then remove PGM-FI main relay 1 (FI MAIN) (A).
12. 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 .
13. Reconnect ECM/PCM connector E (31P).
14. 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 .
15. Disconnect ECM/PCM connector A (31P).
16. 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 .
17. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ), then remove PGM-FI main relay 1 (FI MAIN) (A).
18. 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.
19. Replace PGM-FI main relay 1 (FI MAIN) (A).
20. Reconnect all connectors.
21. Turn the ignition switch ON (II).
22. Reset the ECM/PCM with the HDS.
23. Turn the ignition switch OFF.
24. Wait 10 seconds.
25. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0563 is indicated, check for poor connections or loose terminals at PGM-FI main relay 1 (FI MAIN) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
27. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
28. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0563 is indicated, check for poor connections or loose terminals at PGM-FI main relay 1 (FI MAIN) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P0602: ECM/PCM Programming Error (2005-2006 models)

Note. 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 will be damaged.

1. Update the ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
2. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0602 indicated? YES - Replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Troubleshooting is complete.

DTC P0603: ECM/PCM Internal Circuit Malfunction (Keep Alive Memory (KAM) Error) (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Wait for 1 second.
4. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Intermittent failure, system is OK at this time.

DTC P0606: ECM/PCM Processor Malfunction (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON (II).
5. Wait 40 seconds.
6. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0606 indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Intermittent failure, system is OK at this time.

DTC P0607, P1607: ECM/PCM Internal Circuit Malfunction (2004 model); ECM/PCM Internal Circuit Malfunction (2002-2003 models)

Note. Information marked with an asterisk (*) applies to 2004 model. Information marked with double asterisk (**) applies to 2002-2003 models.

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Turn the ignition switch ON (II).
3. Wait 40 seconds. Is DTC P0607* (P1607)** indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Intermittent failure, system is OK at this time.

DTC P0630: VIN Not Programmed or Mismatch (2005-2006 models)

Note. This DTC is stored only when the ECM/PCM does not have the VIN information of the vehicle. Use the HDS to fill the missing VIN information.

1. Turn the ignition switch ON (II).
2. Check the VIN with the HDS. Does the HDS show the vehicle's VIN? YES - Go to step 5 . NO - Go to step 3.
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.
4. Check for DTCs with the HDS. Is DTC P0603 indicated? YES - Go to the «DTC P0603: ECM/PCM INTERNAL CIRCUIT MALFUNCTION (KEEP ALIVE MEMORY (KAM) ERROR) (2005-2006 MODELS)»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-p0603-ecmpcm-internal-circuit-malfunction) troubleshooting. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-updating-and-substitution-for-testing) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
5. Clear the DTC with the HDS.
6. Turn the ignition switch OFF.
7. Turn the ignition switch ON (II), and wait 5 seconds.
8. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0630 is indicated, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Intermittent failure, system is OK at this time.

DTC P0685: ECM/PCM Power Control Circuit/Internal Circuit Malfunction (2005-2006 models)

Note. If the problem doesn't return after you clear the DTC, or if this DTC is stored intermittently, check for loose terminals at the IGP line connectors before replacing the ECM/PCM.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, then let it idle for 30 seconds.
4. Turn the ignition switch OFF.
5. Start the engine, then let it idle for 30 seconds.
6. Turn the ignition switch OFF.
7. Turn the ignition switch ON (II).
8. Check for Temporary DTCs or DTCs with the HDS. Is DTC P0685 indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Intermittent failure, system is OK at this time.

DTC P0700: A/T Control System Malfunction

Note. 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 DTC'S TROUBLESHOOTING .

DTC P0720: Output Shaft (Countershaft) Speed Sensor Circuit Malfunction (2005-2006 models)

Note. This DTC only occurs on M/T vehicles.

Scheme 169

Scheme 170

Scheme 171

Scheme 172

Scheme 173

1. 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.
2. Test-drive several miles.
3. Check the C SHAFT SPD in the DATA LIST with the HDS. Is any vehicle speed indicated? YES - Intermittent failure, 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.
4. Turn the ignition switch OFF.
5. Disconnect the output shaft (countershaft) speed sensor 3P connector.
6. Turn the ignition switch ON (II).
7. 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 (A21) and the output shaft (countershaft) speed sensor, then go to step 17 .
8. 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 .
9. 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, then go to step 17 .
10. 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.
11. Turn the ignition switch OFF.
12. Jump the SCS line with the HDS.
13. Disconnect ECM connector A (31P).
14. 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 .
15. Turn the ignition switch OFF.
16. Replace the output shaft (countershaft) speed sensor (see «OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ), then go to step 17.
17. Reconnect all connectors.
18. Turn the ignition switch ON (II).
19. Reset the ECM with the HDS.
20. Do the ECM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
21. Test-drive under these conditions: Engine coolant temperature 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
22. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0720 is indicated, check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and the ECM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 23.
23. Monitor the OBD STATUS for DTC P0720 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, go to step 1 and recheck. If the screen indicates NOT COMPLETED, go to step 21 and recheck.
24. Update the ECM if it does not have the latest software, or substitute a known-good ECM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
25. Test-drive under these conditions: Engine coolant temperature 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
26. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P0720 is indicated, check for poor connections or loose terminals at the output shaft (countershaft) speed sensor and the ECM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P1106, P2227: BARO Sensor Circuit Range/Performance Problem (2002-2003 models); BARO Sensor Circuit Range/Performance Problem (2004 model)

Note. Information marked with an asterisk (*) applies to 2002-2003 models. Information marked with double asterisk (**) applies to 2004 model.

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
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.
3. Test-drive with the A/T in D position, or the M/T in 4th gear.
4. Accelerate for 5 seconds using wide open throttle.
5. Check for a Temporary DTC with a scan tool or the HDS. Is Temporary DTC P1106* (P2227)** indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Intermittent failure, system is OK at this time.

DTC P1107, P1108, P2228, P2229: BARO Sensor Circuit Low Voltage (2002-2003 models); BARO Sensor Circuit High Voltage (2002-2003 models); BARO Sensor Circuit Low Voltage (2004 model); BARO Sensor Circuit High Voltage (2004 model)

Note. Information marked with an asterisk (*) applies to 2002-2003 models. Information marked with double asterisk (**) applies to 2004 model.

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Turn the ignition switch ON (II). Is DTC P1107* (P2228)** or P1108* (P2229)** indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Intermittent failure, system is OK at this time.

DTC P1109: BARO Sensor Circuit Out of Range High (2005-2006 models)

1. Reset the ECM/PCM with the HDS.
2. Start the engine.
3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P1109 indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Intermittent failure, system is OK at this time.

DTC P1121: TP Sensor Signal Lower Than Expected (2002-2004 models)

Note. Information marked with * 1 applies to K20A3 engine; * 2 applies to K20A2 engine.

1. Turn the ignition switch ON (II).
2. Check the throttle position with a scan tool or the HDS. Is 12.6%, 0.6 V * 1 (12.9%, 0.6 V) * 2 , or higher indicated when the throttle is fully opened? YES - Intermittent failure, system is OK at this time. NO - Replace the throttle body, K20A2 engine (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system__throttle-body-removalinstallation) ), K20A3 engine (see «K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).

DTC P1121: TP Sensor Signal Lower Than Expected (2005-2006 models)

Note. Information marked with an asterisk (*) applies to K20Z1 engine.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Open the throttle fully.
4. Check the TP SENSOR in the DATA LIST with the HDS. Is the throttle position less than 6.4 (4.2)* degrees (REL) (28 (15)* % (REL)) for 5 seconds? YES - Go to step 8 . NO - Go to step 5.
5. 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.
6. Test-drive the vehicle at 16 mph (25 km/h) or more, and at 1,050 (1,300)* RPM or more.
7. Monitor the OBD STATUS for DTC P1121 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES - Go to step 8. NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the TP sensor and the ECM/PCM. If the screen indicates NOT COMPLETED, go to step 5 and recheck.
8. Turn the ignition switch OFF.
9. Replace the throttle body, K20Z1 engine (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system__throttle-body-removalinstallation) ), K20A3 engine (see «K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
10. Turn the ignition switch ON (II).
11. Reset the ECM/PCM with the HDS.
12. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
13. 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.
14. Test-drive the vehicle at 16 mph (25 km/h) or more, and at 1,050 (1,300)* RPM or more.
15. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1121 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 16.
16. Monitor the OBD STATUS for DTC P1121 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 13 and recheck.

DTC P1122: TP Sensor Signal Higher Than Expected (2002-2004 models)

Note. Information marked with * 1 applies to K20A3 engine; * 2 applies to K20A2 engine.

1. Turn the ignition switch ON (II).
2. Check the throttle position with a scan tool or the HDS. Is 12.6 %, 0.6 V * 1 (12.9 %, 0.6 V) * 2 , or less indicated when the throttle is fully closed? YES - Intermittent failure, system is OK at this time. NO - Replace the throttle body, K20A2 engine (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system__throttle-body-removalinstallation) ), K20A3 engine (see «K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).

DTC P1122: TP Sensor Signal Higher Than Expected (2005-2006 models)

Note. Information marked with an asterisk (*) applies to K20Z1 engine.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Check the TP SENSOR in the DATA LIST with the HDS. Is the throttle position less than 6.4 (4.2)* degrees (REL) (28 (15)* % (REL)) for 5 seconds? YES - Go to step 8 . NO - Go to step 5.
5. 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.
6. Test-drive the vehicle at 16 mph (25 km/h) or more, and, at 1,050 (1,300)* RPM or more.
7. Monitor the OBD STATUS for DTC P1122 in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES - Go to step 8. NO - If the screen indicates PASSED, intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the TP sensor and the ECM/PCM. If the screen indicates NOT COMPLETED, go to step 5 and recheck.
8. Turn the ignition switch OFF.
9. Replace the throttle body, K20Z1 engine (see «THROTTLE BODY REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system__throttle-body-removalinstallation) ), K20A3 engine (see «K20A3 ENGINE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
10. Turn the ignition switch ON (II).
11. Reset the ECM/PCM with the HDS.
12. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
13. 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.
14. Test-drive the vehicle at 16 mph (25 km/h) or more, and at 1,050 RPM or more.
15. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1121 is indicated, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 16.
16. Monitor the OBD STATUS for DTC P1122 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. NO - If the screen indicates FAILED, check for poor connections or loose terminals at the TP sensor and the ECM/PCM, then go to step 1 . If the screen indicates NOT COMPLETED, go to step 13 and recheck.

DTC P1128: MAP Sensor Circuit Lower Than Expected (2002-2004 models)

1. Turn the ignition switch ON (II).
2. Check the MAP with a scan tool or the HDS. Is 54.1 kPa (16.0 in.Hg, 406 mmHg), 1.6 V or higher indicated? YES - Intermittent failure, system is OK at this time. NO - Replace the MAP sensor (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).

DTC P1128: MAP Sensor Circuit Lower Than Expected (2005-2006 models)

Note. Information marked with an asterisk (*) applies to K20Z1 engine.

1. Turn the ignition switch ON (II).
2. 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.
3. Clear the DTC with the HDS.
4. 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.
5. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 3rd gear) Vehicle speed above 15 mph (24 km/h) Engine speed between 1,000 and 4,000 RPM for 2 seconds or more
6. 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, 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.
7. Turn the ignition switch OFF.
8. Replace the MAP sensor (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
9. Turn the ignition switch ON (II).
10. Reset the ECM/PCM with the HDS.
11. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
12. 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.
13. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 3rd gear) Vehicle speed above 15 mph (24 km/h) Engine speed between 1,000 and 4,000 RPM for 2 seconds or more
14. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1128 is indicated, check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 15.
15. Monitor the OBD STATUS for DTC P1128 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 and recheck.

DTC P1129: MAP Sensor Circuit Higher Than Expected (2002-2004 models)

1. 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.
2. Check the MAP with a scan tool or the HDS. Is 36.9 kPa (10.9 in.Hg, 277 mmHg), 1.1 V, or less indicated? YES - Intermittent failure, system is OK at this time. NO - Replace the MAP sensor (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).

DTC P1129: MAP Sensor Circuit Higher Than Expected (2005-2006 models)

Note. Information marked with an asterisk (*) applies to K20Z1 engine.

1. Check for vacuum leaks in these parts: PCV valve PCV hose EVAP canister purge valve Throttle body Intake manifold Brake booster hose Are there any vacuum leaks? YES - Go to step 2. NO - Repair or replace parts with vacuum leaks, then go to step 9 .
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.
3. 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.
4. Clear the DTC with the HDS.
5. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) Engine speed between 1,050 (1,300)* and 6,700 (7,800)* RPM A/T in D position (M/T in 5th gear) Maintain a vehicle speed of 55-75 mph (88-121 km/h) for 10 seconds Decelerate with throttle fully closed for at least 2 seconds
6. 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, 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.
7. Turn the ignition switch OFF.
8. Replace the MAP sensor (see «THROTTLE BODY DISASSEMBLY/REASSEMBLY»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
9. Turn the ignition switch ON (II).
10. Reset the ECM/PCM with the HDS.
11. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
12. 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.
13. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) Engine speed between 1,050 (1,300)* and 6,700 (7,800)* RPM A/T in D position (M/T in 5th gear) Maintain a vehicle speed of 55-75 mph (88-121 km/h) for 10 seconds Decelerate with throttle fully closed for at least 2 seconds
14. Check for Temporary DTCs or DTC with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1129 is indicated, check for poor connections or loose terminals at the MAP sensor and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 15.
15. Monitor the OBD STATUS for DTC P1129 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 and recheck.

Scheme 174

Scheme 175

Scheme 176

Scheme 177

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Is DTC P1157 indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the A/F sensor (Sensor 1) 4P connector and ECM/PCM connector A (31P).
5. Connect A/F sensor (Sensor 1) 4P connector terminals No. 1 and No. 2 with a jumper wire.
6. Check for continuity between ECM/PCM connector terminals A6 and A16. Is there continuity? YES - Go to step 9 . NO - Go to step 7.
7. Connect A/F sensor (Sensor 1) 4P connector terminal No. 1 to body ground with a jumper wire.
8. Check for continuity between ECM/PCM connector terminal A6 and body ground. Is there continuity? YES - Repair open in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A16). NO - Repair open in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A6).
9. Substitute a known-good A/F sensor (Sensor 1) and recheck. Is DTC P1157 indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).

Scheme 178

Scheme 179

Scheme 180

Scheme 181

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, and let it idle for 20 seconds.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P1157 indicated? YES - Go to step 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Jump the SCS line with the HDS.
7. Disconnect the A/F sensor (Sensor 1) 4P connector.
8. Disconnect ECM/PCM connector A (31P).
9. Connect A/F sensor (Sensor 1) 4P connector terminals No. 1 and No. 2 with a jumper wire.
10. Check for continuity between ECM/PCM connector terminals A28 and A31. Is there continuity? YES - Go to step 14 . NO - Go to step 11.
11. Remove the jumper wire from the A/F sensor (Sensor 1) 4P connector.
12. Connect A/F sensor (Sensor 1) 4P connector terminal No. 1 to body ground with a jumper wire.
13. 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 .
14. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
15. Reconnect all connectors.
16. Turn the ignition switch ON (II).
17. Reset the ECM/PCM with the HDS.
18. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
19. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1157 is indicated, 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 21 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 20.
20. Monitor the OBD STATUS for DTC P1157 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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, go to step 18 and recheck.
21. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
22. Check for Temporary DTCs or DTCs with the HDS. Is DTC P1157 indicated? YES - Go to step 20 and recheck. NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 182

Scheme 183

Scheme 184

Scheme 185

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine, and let it idle for at least 2 minutes. Is DTC P1162 indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Start the engine.
5. Measure voltage between ECM/PCM connector terminals A6 and A24 and between A16 and A24. Is there 2.5-3.0 V? YES - Go to step 6. NO - Go to step 10 .
6. Turn the ignition switch OFF.
7. Disconnect the A/F sensor (Sensor 1) 4P connector and ECM/PCM connector A (31P).
8. Connect ECM/PCM connector terminals A6 and A16 to body ground with a jumper wire.
9. Check for continuity between A/F sensor (Sensor 1) 4P connector terminals No. 1, No. 2, and body ground individually. Is there continuity? YES - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ). NO - Repair open in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A6 or A16).
10. Turn the ignition switch OFF.
11. Disconnect the A/F sensor (Sensor 1) 4P connector and ECM/PCM connector A (31P).
12. Check for continuity between body ground and A/F sensor (Sensor 1) 4P connector terminals No. 2 and No. 1. Is there continuity? YES - Repair short in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A6 or A16). NO - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).

DTC P1164, P2A00: A/F Sensor (Sensor 1) Circuit Range/Performance Problem (2002-2003 models); A/F Sensor (Sensor 1) Circuit Range/Performance Problem (2004 model)

Note. Information marked with an asterisk (*) applies to 2002-2003 models. Information marked with double asterisk (**) applies to 2004 model.

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Hold the engine speed at 3,000 RPM without load (in Park or neutral) until the radiator fan comes on.
3. Check for a Temporary DTC with a scan tool or the HDS. Is Temporary DTC P1164 (P2A00)* indicated? YES - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ). NO - Go to step 4.
4. Test-drive in D3 position (M/T in 3rd gear). Starting at 1,600 RPM, accelerate using wide open throttle for at least 5 seconds. Then decelerate for at least 5 seconds with the throttle completely closed until the readiness code or Temporary DTC P1164 comes on. Is Temporary DTC P1164 (P2A00)* Indicated? YES - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ). NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at C101 (located under the right side of the dash), C401 (located under the left side of the dash), the A/F sensor relay, the A/F sensor (Sensor 1) and the ECM/PCM.

DTC P1167: A/F Sensor (Sensor 1) Heater System Malfunction (2002 model)

Note. If DTC P1162 is stored the same time as DTC P1167, troubleshoot DTC P1162 first, then troubleshoot DTC P1167 (2002 model only).

Scheme 186

Scheme 187

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Wait for at least 80 seconds. Is DTC P1167 indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at C101 (located under the right side of the dash), C401 (located under middle of the dash), C402 (located under middle of the dash) the A/F sensor relay, the A/F sensor (Sensor 1), and the ECM/PCM.
3. Disconnect the A/F sensor (Sensor 1) 4P connector and ECM/PCM connector A (31P).
4. Connect ECM/PCM connector terminals A6 and A16 to body ground with a jumper wire.
5. Check for continuity between body ground and A/F sensor (Sensor 1) 4P connector terminals No. 1 and No. 2 individually. Is there continuity? YES - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ). NO - Repair open in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A6 or A16).

DTC P1172: A/F Sensor (Sensor 1) Circuit Out of Range High (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Monitor the OBD STATUS for 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, 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.
5. Turn the ignition switch OFF.
6. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
7. Turn the ignition switch ON (II).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
10. 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.
11. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1172 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 12.
12. Monitor the OBD STATUS for DTC P1172 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 10 and recheck.

Scheme 188

Scheme 189

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine.
3. Turn on the headlights. Is DTC P1297 indicated? YES - Go to step 4. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.
4. Turn the ignition switch and the headlights OFF.
5. Disconnect the ELD 3P connector.
6. Turn the ignition switch ON (II).
7. Measure voltage between body ground and ELD 3P connector terminal No. 3. Is there about 5 V? YES - Replace the ELD. NO - Go to step 8.
8. Turn the ignition switch OFF.
9. Disconnect ECM/PCM connector E (31P).
10. Check for continuity between body ground and ECM/PCM connector terminal E15. Is there continuity? YES - Repair short in the wire between the ECM/PCM (E15) and the ELD. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 190

1. Turn the ignition switch ON (II).
2. Check the ELD in the DATA LIST with the HDS. Is 72 A or more indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the ELD 3P connector.
5. Turn the ignition switch ON (II).
6. 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 .
7. Turn the ignition switch OFF.
8. Jump the SCS line with the HDS.
9. Disconnect ECM/PCM connector E (31P).
10. 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 .
11. Turn the ignition switch OFF.
12. Replace the underhood fuse/relay box.
13. Reconnect all connectors.
14. Turn the ignition switch ON (II).
15. Reset the ECM/PCM with the HDS.
16. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
17. Start the engine.
18. Turn on the headlights.
19. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1297 is indicated, check for poor connections or loose terminals at the ELD and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
20. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
21. Start the engine.
22. Turn on the headlights.
23. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1297 is indicated, check for poor connections or loose terminals at the ELD and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 191

Scheme 192

Scheme 193

Scheme 194

Scheme 195

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine.
3. Turn on the headlights. Is DTC P1298 indicated? YES - Go to step 4. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.
4. Turn the ignition switch and headlights OFF.
5. Disconnect the ELD 3P connector.
6. Turn the ignition switch ON (II).
7. Measure voltage between body ground and ELD 3P connector terminal No. 1. Is there battery voltage? YES - Go to step 8. NO - Check the No. 4 ACG (10 A) fuse in the underdash fuse/relay box. If the fuse is OK, repair open in the wire between the No. 4 ACG (10 A) fuse and the ELD.
8. Turn the ignition switch OFF.
9. Connect ELD 3P connector terminal No. 3 and body ground with a jumper wire.
10. Disconnect ECM/PCM connector E (31P).
11. Check for continuity between body ground and ECM/PCM connector terminal E15. Is there continuity? YES - Go to step 12. NO - Repair open in the wire between the ECM/PCM (E15) and the ELD.
12. 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 G301.
13. Reconnect the ELD 3P connector and ECM/PCM connector E (31P).
14. Start the engine, and let it idle.
15. While measuring voltage between ECM/PCM connector terminals A24 and E15, turn the headlights on (high). Does the voltage drop? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Replace the ELD.

Scheme 196

Scheme 197

Scheme 198

Scheme 199

1. Start the engine, and let it idle.
2. 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, system is OK at this time. Check for poor connections or loose terminals at the ELD and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the ELD 3P connector.
5. Turn the ignition switch ON (II).
6. Measure voltage between ELD 3P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 7. NO - Repair open in the wire between the No. 4 ACG (10 A) fuse and the ELD, then go to step 14 .
7. Turn the ignition switch OFF.
8. Connect ELD 3P connector terminal No. 3 to body ground with a jumper wire.
9. Jump the SCS line with the HDS.
10. Disconnect ECM/PCM connector E (31P).
11. 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 .
12. 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 G301, then go to step 14 .
13. Replace the underhood fuse/relay box.
14. Reconnect all connectors.
15. Turn the ignition switch ON (II).
16. Reset the ECM/PCM with the HDS.
17. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
18. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs with the HDS? YES - Go to step 19 NO - Troubleshooting is complete.
19. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
20. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1298 is indicated, check for poor connections or loose terminals at the ELD and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P1549: Charging System High Voltage (2005-2006 models)

Note. If a high voltage battery (24 V, etc.) is connected to the vehicle, this DTC can be stored.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check under these conditions: A/C off Headlights off Rear window defogger off
5. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
6. Check for Temporary DTCs or DTCs with the HDS. Is DTC P1549 indicated? YES - Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/rsx/i-2001-2004/remont/charging-system/#charging-system) ), then go to step 7. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the alternator and the underhood fuse/relay box.
7. Turn the ignition switch ON (II).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
10. Start the engine.
11. Check under these conditions: A/C off Headlights off Rear window defogger off
12. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
13. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P1549 is indicated, check for poor connections or loose terminals at the alternator and the underhood fuse/relay box, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.

DTC P16BB: Alternator B Terminal Circuit Low Voltage (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. 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
5. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
6. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BB indicated? YES - Go to step 7. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the alternator and the underhood fuse/relay box, and check the battery performance (see «BATTERY TEST»(/acura/rsx/i-2001-2004/remont/body-electrical/#battery) ).
7. Check for poor connections or loose terminals at the alternator and the underhood fuse/relay box (+B line). Are the connections and terminals OK? YES - Go to step 8. NO - Reconnect the connectors or terminals, then go to step 9 .
8. Check for an open in the wire between the alternator and underhood fuse/relay box at the starter subharness. Is the harness OK? YES - Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/rsx/i-2001-2004/remont/charging-system/#charging-system) ), then go to step 9. NO - Repair open in the wire between the alternator and the underhood fuse/relay box, then go to step 9.
9. Turn the ignition switch ON (II).
10. Reset the ECM/PCM with the HDS.
11. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
12. Start the engine.
13. 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
14. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
15. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P16BB is indicated, check for poor connections or loose terminals at the alternator and the underhood fuse/relay box, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.

Scheme 200

Scheme 201

Scheme 202

Scheme 203

1. Check for poor connections at the alternator 4P connector. Are the connections OK? YES - Go to step 2. NO - Reconnect the connector, then go to step 18 .
2. Turn the ignition switch ON (II).
3. Clear the DTC with the HDS.
4. Start the engine.
5. 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
6. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
7. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BC indicated? YES - Go to step 8. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the alternator.
8. Turn the ignition switch OFF.
9. Disconnect the alternator 4P connector.
10. Turn the ignition switch ON (II).
11. Measure voltage between alternator 4P connector terminal No. 1 and body ground. Is there battery voltage? YES - Go to step 12. NO - Repair open in the wire between the alternator (IG1 line) and the No. 4 ACG (10 A) fuse in underdash fuse/relay box, then go to step 18 .
12. Measure voltage between alternator 4P connector terminal No. 4 and body ground. Is there about 5 V? YES - Replace the rear housing assembly of alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(/acura/rsx/i-2001-2004/remont/charging-system/#charging-system) ), then go to step 18 . NO - Go to step 13.
13. Turn the ignition switch OFF.
14. Jump the SCS line with the HDS.
15. Disconnect ECM/PCM connector B (24P).
16. Connect alternator 4P connector terminal No. 4 to body ground with a jumper wire.
17. Check for continuity between ECM/PCM connector terminal B13 and body ground. Is there continuity? YES - Go to step 26 . NO - Repair open in the wire between the ECM/PCM (B13) and the alternator, then go to step 18 .
18. Turn the ignition switch ON (II).
19. Reconnect all connectors.
20. Reset the ECM/PCM with the HDS.
21. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
22. Start the engine.
23. 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
24. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
25. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P16BC is indicated, check for poor connections or loose terminals at the alternator and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Troubleshooting is complete.
26. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
27. Start the engine.
28. Check under these conditions: A/C on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Head lights on high beam
29. Hold the engine speed at 2,000 RPM (in Park or neutral) for 1 minute.
30. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P16BC is indicated, check for poor connections or loose terminals at the alternator and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P2195: A/F Sensor (Sensor 1) Signal Stuck Lean (2005-2006 models)

Note. If the vehicle was out of fuel and the engine stalled before this DTC was stored, refuel and clear the DTC with the HDS.

1. Inspect the condition of the A/F sensor (Sensor 1). Is it loose in the exhaust pipe? YES - Go to step 2. NO - Go to step 4 .
2. Turn the ignition switch OFF.
3. Reinstall the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
4. Turn the ignition switch ON (II).
5. Reset the ECM/PCM with the HDS.
6. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
7. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2195 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the connection and terminal fits are OK, go to step 8. If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
8. Monitor the OBD STATUS for DTC P2195 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 2 . If the screen indicates NOT COMPLETED, go to step 5 and recheck.

DTC P2227: BARO Sensor Circuit Range/Performance Problem (2005-2006 models)

Note. 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.

1. Turn the ignition switch ON (II), and wait 2 seconds.
2. 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 - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
3. Clear the DTC with the HDS.
4. 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.
5. Test-drive under these conditions, then connect the HDS. Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 4th gear) Throttle position between 12 degrees and 20 degrees for 2 seconds
6. 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, system is OK at this time. If the screen indicates NOT COMPLETED, go to step 4 and recheck.
7. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
8. Reset the ECM/PCM with the HDS.
9. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
10. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2227 is indicated, check for poor connections or loose terminals at the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P2228: BARO Sensor Circuit Low Voltage (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Check the BARO SENSOR in the DATA LIST with the HDS. Is about 53 kPa (15.6 in.Hg, 397 mmHg), 1.58 V or less indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time.
3. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
4. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2228 is indicated, check for poor connections or loose terminals at the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P2229: BARO Sensor Circuit High Voltage (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Check the BARO SENSOR in the DATA LIST with the HDS. Is about 160 kPa (47.2 in.Hg, 1200 mmHg), 4.5 V or more indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time.
3. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
4. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2229 is indicated, check for poor connections or loose terminals at the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 204

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Is DTC P2238 indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the A/F sensor (Sensor 1) 4P connector, and ECM/PCM connector A (31P).
5. Check for continuity between ECM/PCM connector terminal A6 and body ground. Is there continuity? YES - Repair short in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A6). NO - Go to step 6.
6. Substitute a known-good A/F sensor (Sensor 1) and recheck. Is DTC P2238 indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).

Scheme 205

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2238 indicated? YES - Go to step 4. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
4. Turn the ignition switch OFF.
5. Jump the SCS line with the HDS.
6. Disconnect the A/F sensor (Sensor 1) 4P connector.
7. Disconnect ECM/PCM connector A (31P).
8. 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 11 . NO - Go to step 9.
9. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
10. Reconnect all connectors.
11. Turn the ignition switch ON (II).
12. Reset the ECM/PCM with the HDS.
13. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
14. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2238 is indicated, 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 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 15.
15. Monitor the OBD STATUS for DTC P2238 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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, go to step 13 and recheck.
16. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
17. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2238 indicated? YES - Go to step 1 and recheck. NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

Scheme 206

1. Reset the ECM/PCM (see «ECM/PCM RESET (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2002-2004-models) ).
2. Start the engine. Is DTC P2252 indicated? YES - Go to step 3. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
3. Turn the ignition switch OFF.
4. Disconnect the A/F sensor (Sensor 1) 4P connector, and ECM/PCM connector A (31P).
5. Check for continuity between ECM/PCM connector terminal A16 and body ground. Is there continuity? YES - Repair short in the wire between the A/F sensor (Sensor 1) and the ECM/PCM (A16). NO - Go to step 6.
6. Substitute a known-good A/F sensor (Sensor 1) and recheck. Is DTC P2252 indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-updating-and-substitution-for-testing) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).

Scheme 207

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2252 indicated? YES - Go to step 5. NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM.
5. Turn the ignition switch OFF.
6. Jump the SCS line with the HDS.
7. Disconnect the A/F sensor (Sensor 1) 4P connector.
8. Disconnect ECM/PCM connector A (31P).
9. 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 12 . NO - Go to step 10.
10. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
11. Reconnect all connectors.
12. Turn the ignition switch ON (II).
13. Reset the ECM/PCM with the HDS.
14. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
15. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2252 is indicated, 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 17 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 16.
16. Monitor the OBD STATUS for DTC P2252 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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, go to step 14 and recheck.
17. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ).
18. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2252 indicated? YES - Go to step 1 and recheck. NO - 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

DTC P2270, P2271: Secondary HO2S (Sensor 2) Circuit Signal Stuck Lean (2005-2006 models); Secondary HO2S (Sensor 2) Circuit Signal Stuck Rich (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Test-drive under these conditions: Engine coolant temperature above 176°F (80°C) Vehicle speed at 35 mph (56 km/h) or more Drive 20 seconds or more
5. 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, 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.
6. Turn the ignition switch OFF.
7. Replace the secondary HO2S (Sensor 2) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
8. Turn the ignition switch ON (II).
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
11. 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.
12. Test-drive under these conditions: Engine coolant temperature above 176°F (80°C) Vehicle speed at 35 mph (56 km/h) or more Drive 20 seconds or more
13. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2270 or P2271 is indicated, check for poor connections or loose terminals at the secondary HO2S (Sensor 2) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 14.
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. 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 and recheck.

DTC P2610: ECM/PCM Internal Ignition Off Internal Timer Malfunction (2005-2006 models)

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P2610 indicated? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Intermittent failure, system is OK at this time.

DTC P2A00: A/F Sensor (Sensor 1) Circuit Range/Performance Problem (2005-2006 models)

Note. Information marked with asterisk (*) applies to K20Z1 engine.

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 3rd gear) Drive the vehicle 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 slow down with the throttle completely closed for 4 seconds
5. 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, 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.
6. Turn the ignition switch OFF.
7. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__af-sensor-replacement) ).
8. Turn the ignition switch ON (II).
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
11. Test-drive under these conditions: Engine coolant temperature above 158°F (70°C) A/T in D position (M/T in 3rd gear) Drive the vehicle 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 slow down with the throttle completely closed for 4 seconds
12. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - If DTC P2A00 is indicated, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 13.
13. Monitor the OBD STATUS for DTC P2A00 in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES - Troubleshooting is complete. 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 10 and recheck.

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Scheme 239

1. Connect a scan tool or the HDS to the DLC (see «GENERAL TROUBLESHOOTING INFORMATION»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems) ).
2. Turn the ignition switch ON (II) and read a scan tool or the HDS. Does a scan tool or the HDS communicate with the ECM/PCM? YES - Go to step 3. NO - Go to troubleshooting "DLC Circuit Troubleshooting" (see «DLC CIRCUIT TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
3. Check a scan tool or the HDS for DTCs. Are any DTCs indicated? YES - go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 4.
4. Turn the ignition switch OFF.
5. Turn the ignition switch ON (II) and watch the malfunction indicator lamp (MIL). Does the MIL come on and stay on for more than 20 seconds? YES - If the MIL stays on, go to step 74 . But if the MIL sometimes works normally, first check for these problems. An intermittent short in the wire between the ECM/PCM (E29) and the data link connector (DLC). An intermittent short in the wire between the ECM/PCM (E31) and the gauge assembly. The readiness codes are not set (see «HOW TO SET READINESS CODES»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems) ). (This is indicated if the MIL blinks 5 times after you turn the ignition switch ON (II) and wait about 20 seconds.) NO - If the MIL is always off, go to step 6. But if the MIL sometimes works normally, first check for these problems: A loose No. 10 METER (7.5 A) fuse in the underdash fuse/relay box. A loose No. 20 IG (USA: 40 A, Canada: 50 A) fuse in the underhood fuse/relay box. A loose No. 6 ECU (ECM/PCM) (15 A) fuse in the underhood fuse/relay box. A loose No. 17 FUEL PUMP (15 A) fuse in the underdash fuse/relay box. A poor connection at ECM/PCM terminal E31. An intermittent open in the GRN/ORN wire between the ECM/PCM (E31) and the gauge assembly. An intermittent short in the wire between the ECM/PCM (A21) and the manifold absolute pressure (MAP) sensor, intake manifold tuning (IMT) (intake manifold runner control (IMRC)) valve position sensor, or output shaft (countershaft) speed sensor (A/T). An intermittent short in the wire between the ECM/PCM (A20) and the throttle position (TP) sensor, input shaft (mainshaft) speed sensor (A/T). An intermittent short in the wire between the ECM/PCM (E5) and the fuel tank pressure (FTP) sensor.
6. Check the low oil pressure indicator (with the ignition switch ON). Is the low oil pressure indicator on? YES - Go to step 9 . NO - Go to step 7.
7. Inspect the No. 10 METER (7.5 A) fuse in the underdash fuse/relay box. Is the fuse OK? YES - Go to step 8. NO - Repair short in the wire between No. 10 METER (7.5 A) fuse and the gauge assembly. Also replace the No. 10 METER (7.5 A) fuse.
8. Inspect the No. 20 IG (USA: 40 A, Canada: 50 A) fuse in the underhood fuse/relay box. Is the fuse OK? YES - Repair open in the wire between the No. 20 IG (USA: 40 A, Canada: 50 A) fuse and the gauge assembly. If the wires are OK, test the ignition switch (see «IGNITION KEY SWITCH TEST»(/acura/rsx/i-2001-2004/remont/interiorillumination-lights/#entry-lights-control-system__ignition-key-switch-test) ). NO - Repair short in the wire between No. 20 IG (USA: 40 A, Canada: 50 A) fuse and the underdash fuse/relay box. Also replace the No. 20 IG (USA: 40 A, Canada: 50 A) fuse.
9. Try to start the engine. Does the engine start? YES - Go to step 10. NO - Go to step 13 .
10. Turn the ignition switch OFF.
11. Connect ECM/PCM connector terminal E31 to body ground with a jumper wire.
12. Turn the ignition switch ON (II). Is the MIL on? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Check for an open in the wire between the ECM/PCM (E31) and the gauge assembly. Also check for a blown MIL bulb. If the wires and the bulb are OK, replace the gauge assembly.
13. Turn the ignition switch OFF.
14. Inspect the No. 6 ECU (ECM/PCM) (15 A) fuse in the underhood fuse/relay box. Is the fuse OK? YES - Go to step 22 . NO - Go to step 15.
15. Remove the blown No. 6 ECU (ECM/PCM) (15 A) fuse in the underdash fuse/relay box.
16. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ).
17. Remove PGM-FI main relay 1 (Fl MAIN) (A).
18. Check for continuity between body ground and the PGM-FI main relay 1 (Fl MAIN) 4P connector terminals No. 2 and No. 4 individually. Is there continuity? YES - Repair short in the wire between the No. 6 ECU (ECM/PCM) (15 A) fuse and PGM-FI main relay 1 (Fl MAIN). Also replace the No. 6 ECU (ECM/PCM) (15 A) fuse. NO - Go to step 19.
19. Disconnect each of the components or connectors below, one at a time, and check for continuity between PGM-FI main relay 1 (Fl MAIN) 4P connector terminal No. 1 and body ground. PGM-FI main relay 2 (FUEL PUMP) ECM/PCM connector A (31P) Each injector 2P connector Idle air control (IAC) valve 3P connector Camshaft position (CMP) sensor B 3P connector Crankshaft position (CKP) sensor 3P connector Immobilizer control unit Is there continuity? YES - Go to step 20. NO - 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, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). Also replace the No. 6 ECU (ECM/PCM) (15 A) fuse.
20. Disconnect the connectors of these components: PGM-FI main relay 2 (FUEL PUMP) ECM/PCM connector A (31P) Injectors Idle air control (IAC) valve Camshaft position (CMP) sensor B Crankshaft position (CKP) sensor Immobilizer control unit
21. Check for continuity between PGM-FI main relay 1 (Fl MAIN) 4P connector terminal No. 1 and body ground. Is there continuity? YES - Repair short in the wire between PGM-FI main relay 1 (Fl MAIN) and each item. Also replace the No. 6 ECU (ECM/PCM) (15 A) fuse. NO - Replace PGM-FI main relay 1 (Fl MAIN). Also replace the No. 6 ECU (ECM/PCM) (15 A) fuse.
22. Inspect the No. 17 FUEL PUMP (15 A) fuse in the underdash fuse/relay box. Is the fuse OK? YES - Go to step 34 . NO - Go to step 23.
23. Remove the blown No. 17 FUEL PUMP (15 A) fuse in the underdash fuse/relay box.
24. Disconnect ECM/PCM connector E (31P).
25. Check for continuity between ECM/PCM connector terminal E9 and body ground. Is there continuity? YES - Go to step 26. NO - Replace the No. 17 FUEL PUMP (15 A) fuse, and update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-updating-and-substitution-for-testing) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
26. Remove PGM-FI main relay 2 (FUEL PUMP) (A).
27. Check for continuity between ECM/PCM connector terminal E9 and body ground. Is there continuity? YES - Repair short in the wire between the No. 17 FUEL PUMP (15 A) fuse and the ECM/PCM (E9), or the No. 17 FUEL PUMP (15 A) fuse and PGM-FI main relay 2 (FUEL PUMP) or the No. 17 fuel pump fuse (15 A) and the SRS unit. Also replace the No. 17 FUEL PUMP (15 A) fuse. NO - Go to step 28.
28. Remove the rear seat cushion (see «REAR SEAT REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/seats/#seat-system__rear-seat-removalinstallation) ).
29. Remove the access panel from the floor.
30. Disconnect the fuel pump 5P connector.
31. 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. 17 FUEL PUMP (15 A) fuse. NO - Go to step 32.
32. Reinstall PGM-FI main relay 2 (FUEL PUMP) (A).
33. 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. 17 FUEL PUMP (15 A) fuse. NO - Check the fuel pump, and replace it if necessary. Also replace the No. 17 FUEL PUMP (15 A) fuse.
34. Disconnect ECM/PCM connector E (31P).
35. Turn the ignition switch ON (II).
36. Measure voltage between ECM/PCM connector terminal E9 and body ground. Is there battery voltage? YES - Go to step 37. NO - Repair open in the wire between the No. 17 FUEL PUMP (15 A) fuse and the ECM/PCM (E9).
37. Turn the ignition switch OFF.
38. Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage? YES - Go to step 42. NO - Go to step 39.
39. Remove PGM-FI main relay 1 (Fl MAIN) (A).
40. Measure voltage between PGM-FI main relay 1 (Fl MAIN) 4P connector terminal No. 4 and body ground. Is there battery voltage? YES - Go to step 41. NO - Repair open in the wire between the No. 6 ECU (ECM/PCM) (15 A) fuse and PGM-FI main relay 1 (FI MAIN).
41. Check for continuity between PGM-FI main relay 1 (Fl MAIN) 4P connector terminal No. 3 and ECM/PCM connector terminal E7. Is there continuity? YES - Test PGM-FI main relay 1 (Fl MAIN) (see «POWER RELAY TEST»(/acura/rsx/i-2001-2004/remont/body-electrical/#relays__power-relay-test) ). If the relay is OK, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair open in the wire between PGM-FI main relay 1 (Fl MAIN) and the ECM/PCM (E7).
42. Reconnect ECM/PCM connector E (31P).
43. Turn the ignition switch ON (II).
44. Measure voltage between body ground and ECM/PCM connector terminals A2 and A3 individually. Is there battery voltage? YES - Go to step 47 . NO - Go to step 45.
45. Turn the ignition switch OFF.
46. Remove PGM-FI main relay 1 (Fl MAIN) (A).
47. Turn the ignition switch ON (II).
48. Measure voltage between PGM-FI main relay 1 (Fl MAIN) 4P connector terminal No. 2 and body ground. Is there battery voltage? YES - Go to step 49. NO - Repair open in the wire between the No. 6 ECU (ECM/PCM) (15 A) fuse and PGM-FI main relay 1 (FI MAIN).
49. Turn the ignition switch OFF.
50. Check for continuity between PGM-FI main relay 1 (Fl 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 (Fl MAIN) and the ECM/PCM (A2, A3).
51. Measure voltage between body ground and ECM/PCM connector terminals A4, A5, A23, and A24 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, A23, A24). NO - Go to step 52.
52. Measure voltage between body ground and ECM/PCM connector terminal A21. Is there about 5 V? YES - Go to step 59 . NO - Go to step 53.
53. Turn the ignition switch OFF.
54. Disconnect the 3P 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 Intake manifold tuning (intake manifold runner control (IMRC)) valve position sensor (K20A3 engine) Output shaft (countershaft) speed sensor (A/T) Is there about 5 V? YES - Replace the sensor that restored 5 V when disconnected. NO - Go to step 55.
55. Turn the ignition switch OFF.
56. Disconnect the 3P connectors from these sensors: Manifold absolute pressure (MAP) sensor Intake manifold tuning (intake manifold runner control (IMRC)) valve position sensor (K20A3 engine) Output shaft (countershaft) speed sensor (A/T)
57. Disconnect ECM/PCM connector A (31P).
58. 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 IMT (IMRC) valve position sensor, or the output shaft (countershaft) speed sensor (A/T). NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
59. Measure voltage between body ground and ECM/PCM connector terminal A20. Is there about 5 V? YES - Go to step 66 . NO - Go to step 60.
60. Turn the ignition switch OFF.
61. Disconnect the 3P 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). Throttle position (TP) 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 62.
62. Turn the ignition switch OFF.
63. Disconnect the 3P connectors from these sensors: Throttle position (TP) sensor Input shaft (mainshaft) speed sensor (A/T)
64. Disconnect ECM/PCM connector A (31P).
65. 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 TP sensor or input shaft (mainshaft) speed sensor (A/T). NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
66. 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, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Go to step 67.
67. Turn the ignition switch OFF.
68. Disconnect the fuel tank pressure (FTP) sensor 3P connector.
69. Turn the ignition switch ON (II).
70. Measure voltage between body ground and ECM/PCM connector terminal E5. Is there about 5 V? YES - Replace the FTP sensor (see «FTP SENSOR REPLACEMENT»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#evap-system) ). NO - Go to step 71.
71. Turn the ignition switch OFF.
72. Disconnect ECM/PCM connector E (31P).
73. 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, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
74. Turn the ignition switch OFF.
75. Turn the ignition switch ON (II).
76. Measure voltage between ECM/PCM connector terminal E29 and body ground. Is there about 5 V (or battery voltage)? YES - Go to step 80 . NO - Go to step 77.
77. Turn the ignition switch OFF.
78. Disconnect ECM/PCM connector E (31P).
79. Check for continuity between ECM/PCM connector terminal E29 and body ground. Is there continuity? YES - Repair short in the wire between the DLC and the ECM/PCM (E29). NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
80. Turn the ignition switch OFF.
81. Disconnect ECM/PCM connector E (31P).
82. Turn the ignition switch ON (II). Is the MIL on? YES - Repair short in the wire between the gauge assembly and the ECM/PCM (E31). If the wires are OK, replace the gauge assembly. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

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1. Turn the ignition switch ON (II), and watch the MIL. Does the MIL stay off? YES - Go to step 16 . NO - Go to step 2.
2. Turn the ignition switch OFF.
3. Turn the ignition switch ON (II), and watch the MIL. Does the MIL stay on for more than 20 seconds or flash more than five times? YES - Go to step 4. NO - The MIL circuit is OK.
4. Turn the ignition switch OFF.
5. Connect the HDS (see «GENERAL TROUBLESHOOTING INFORMATION»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems) ).
6. Turn the ignition switch ON (II), and read the HDS. Does the HDS communicate with the ECM/PCM? YES - Go to step 7. NO - Go to "DLC Circuit Troubleshooting" (see «2005-2006 MODELS»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
7. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES - go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 8.
8. Check the MIL in the DATA LIST with the HDS. Is ON indicated? YES - Go to step 9. NO - Substitute a known-good gauge assembly, and recheck. If the MIL circuit is OK, replace the original gauge assembly.
9. Check the SCS in the DATA LIST with the HDS. Is a short indicated? YES - Go to step 10. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
10. Turn the ignition switch OFF.
11. Jump the SCS line with the HDS.
12. Disconnect ECM/PCM connector E (31P) and the HDS.
13. 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 - Go to step 14.
14. Disconnect the gauge assembly B (20P) connector.
15. Check for continuity between ECM/PCM connector terminal E31 and body ground. Is there continuity? YES - Repair short in the wire between the ECM/PCM (E31) and the gauge assembly. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
16. Try to start the engine. Does the engine start? YES - Go to step 17. NO - Go to step 24 .
17. Turn the ignition switch OFF.
18. Connect ECM/PCM connector terminal E31 to body ground with a jumper wire.
19. Turn the ignition switch ON (II). Is the MIL on? YES - Go to step 22 . NO - Go to step 20.
20. Turn the ignition switch OFF.
21. Inspect the No. 10 METER (7.5 A) fuse in the underdash fuse/relay box. Is the fuse OK? YES - Check for an open in the wire between the ECM/PCM (E31) and the gauge assembly. Also check for a blown MIL bulb. If the wires and the bulb are OK, replace the gauge assembly. NO - Repair short in the wire between No. 10 METER (7.5 A) fuse and the gauge assembly. Also replace the No. 10 METER (7.5 A) fuse.
22. Turn the ignition switch OFF.
23. Connect the HDS (see «GENERAL TROUBLESHOOTING INFORMATION»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems) ).
24. Turn the ignition switch ON (II), and read the HDS. Does the HDS communicate with the ECM/PCM? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Go the "DLC Circuit Troubleshooting" (see «2005-2006 MODELS»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
25. Turn the ignition switch OFF.
26. Inspect the No. 20 IG (USA: 40 A, Canada: 50 A) fuse in the underhood fuse/relay box. Is the fuse OK? YES - Repair open in the wire between the No. 20 IG (USA: 40 A, Canada: 50 A) fuse and the ignition switch. If the wires are OK, go to step 27. NO - Repair short in the wire between No. 20 IG (USA: 40 A, Canada: 50 A) fuse and the underhood fuse/relay box. Also replace the No. 20 IG (USA: 40 A, Canada: 50 A) fuse.
27. Turn the ignition switch OFF.
28. Inspect the No. 6 ECU (ECM/PCM) (20 A) fuse in the underhood fuse/relay box. Is the fuse OK? YES - Go to step 35 . NO - Go to step 29.
29. Remove the blown No. 6 ECU (ECM/PCM) (20 A) fuse in the underhood fuse/relay box.
30. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ). Remove PGM-FI main relay 1 (FI MAIN) (A).
31. 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. 6 ECU (ECM/PCM) (20 A) fuse and PGM-FI main relay 1 (FI MAIN). Also replace the No. 6 ECU (ECM/PCM) (20 A) fuse. NO - Go to step 32.
32. Disconnect each of the components or the connectors below, one at a time, and check for continuity between the PGM-FI main relay 1 (FI MAIN) 4P connector terminal No. 1 and body ground. PGM-FI main relay 2 (FUEL PUMP) ECM/PCM connector A (31P) Each injector 2P connector Idle air control valve 3P connector Camshaft position (CMP) sensor B 3P connector Crankshaft position (CKP) sensor 3P connector Is there continuity? YES - Go to step 33. NO - Replace the part that made continuity 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, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). Also replace the No. 6 ECU (ECM/PCM) (20 A) fuse.
33. Disconnect the connectors of all these components: PGM-FI main relay 2 (FUEL PUMP) ECM/PCM connector A (31P) Injectors Idle air control valve Camshaft position (CMP) sensor B Crankshaft position (CKP) sensor
34. 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. 6 ECU (ECM/PCM) (20 A) fuse. NO - Replace PGM-FI main relay 1 (FI MAIN). Also replace the No. 6 ECU (ECM/PCM) (20 A) fuse.
35. Inspect the No. 17 FUEL PUMP (15 A) fuse in the underdash fuse/relay box. Is the fuse OK? YES - Go to step 48 . NO - Go to step 36.
36. Remove the blown No. 17 FUEL PUMP (15 A) fuse in the underdash fuse/relay box.
37. Jump the SCS line with the HDS.
38. Disconnect ECM/PCM connector E (31P).
39. Check for continuity between ECM connector terminal E9 and body ground. Is there continuity? YES - Go to step 40. NO - Replace the No. 17 FUEL PUMP (15 A) fuse, and update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
40. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ), then remove PGM-FI main relay 2 (FUEL PUMP) (A).
41. Check for continuity between ECM/PCM connector terminal E9 and body ground. Is there continuity? YES - Repair short in the wire between the No. 17 FUEL PUMP (15 A) fuse and the ECM/PCM (E9), or PGM-FI main relay 2 (FUEL PUMP). Also replace the No. 17 FUEL PUMP (15 A) fuse. NO - Go to step 42.
42. Remove the rear seat cushion (see «REAR SEAT REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/seats/#seat-system__rear-seat-removalinstallation) ).
43. Remove the access panel from the floor.
44. Disconnect the fuel pump 5P connector.
45. 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. 17 FUEL PUMP (15 A) fuse. NO - Go to step 46.
46. Reinstall PGM-FI main relay 2 (FUEL PUMP) (A).
47. 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. 17 FUEL PUMP (15 A) fuse. NO - Check the fuel pump, and replace it if necessary. Also replace the No. 17 FUEL PUMP (15 A) fuse.
48. Jump the SCS line with the HDS.
49. Disconnect ECM/PCM connector E (31P).
50. Turn the ignition switch ON (II).
51. Measure voltage between ECM/PCM connector terminals E9 and body ground. Is there battery voltage? YES - Go to step 52. NO - Repair open in the wire between the No. 17 FUEL PUMP (15 A) fuse and the ECM/PCM (E9).
52. Turn the ignition switch OFF.
53. Measure voltage between ECM/PCM connector terminal E7 and body ground. Is there battery voltage? YES - Go to step 57 . NO - Go to step 54.
54. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ), then remove PGM-FI main relay 1 (FI MAIN) (A).
55. 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 56. NO - Repair open in the wire between the No. 6 ECU (ECM/PCM) (20 A) fuse and PGM-FI main relay 1 (FI MAIN).
56. 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/rsx/i-2001-2004/remont/body-electrical/#relays__power-relay-test) ). If the relay is OK, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/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).
57. Reconnect ECM/PCM connector E (31P).
58. Turn the ignition switch ON (II).
59. Measure voltage between body ground and ECM/PCM connector terminals A2 and A3 individually. Is there battery voltage? YES - Go to step 66 . NO - Go to step 60.
60. Turn the ignition switch OFF.
61. Remove the glove box (see «GLOVE BOX REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard__glove-box-removalinstallation) ), then remove PGM-FI main relay 1 (FI MAIN) (A).
62. Turn the ignition switch ON (II).
63. 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 64. NO - Repair open in the wire between the No. 6 ECU (ECM/PCM) (20 A) fuse and PGM-FI main relay 1 (FI MAIN).
64. Turn the ignition switch OFF.
65. 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).
66. Measure voltage between body ground and ECM/PCM connector terminals A4, A5, A8 and A9 individually. Is there less than 1.0 V? YES - Repair open in the wire(s) between that had more than 1.0 V between G101 and the ECM/PCM (A4, A5, A8, A9). NO - Go to step 67.
67. Turn the ignition switch ON (II).
68. Measure voltage between body ground and ECM/PCM connector terminal A21. Is there about 5 V? YES - Go to step 75 . NO - Go to step 69.
69. 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 Intake manifold tuning (IMT) (intake manifold runner control (IMRC)) valve Output shaft (countershaft) speed sensor Is there about 5 V? YES - Replace the sensor that restored 5 V when disconnected. NO - Go to step 70.
70. Turn the ignition switch OFF.
71. Jump the SCS line with the HDS.
72. Disconnect the connectors from the these sensors: Manifold absolute pressure (MAP) sensor Intake manifold tuning (IMT) (intake manifold runner control (IMRC)) valve Output shaft (countershaft) speed sensor
73. Disconnect ECM/PCM connector A (31P).
74. 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, IMT (IMRC) valve or the output shaft (countershaft) speed sensor. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
75. Measure voltage between body ground and ECM/PCM connector terminal A20. Is there about 5 V? YES - Go to step 83 . NO - Go to step 76.
76. Turn the ignition switch OFF.
77. 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). Throttle position (TP) sensor Input shaft (mainshaft) speed sensor Is there about 5 V? YES - Replace the sensor that restored 5 V when disconnected. NO - Go to step 78.
78. Turn the ignition switch OFF.
79. Jump the SCS line with the HDS.
80. Disconnect the connector from these sensors: Throttle position (TP) sensor Input shaft (mainshaft) speed sensor
81. Disconnect ECM/PCM connector A (31P).
82. 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 TP sensor, or input shaft (mainshaft) speed sensor. NO - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).
83. 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, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Go to step 84.
84. Turn the ignition switch OFF.
85. 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/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#evap-system) ). NO - Go to step 86.
86. Turn the ignition switch OFF.
87. Jump the SCS line with the HDS.
88. Disconnect the FTP sensor 3P connector.
89. Disconnect ECM/PCM connector E (31P).
90. 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, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ).

2002-2004 models

If the ECM/PCM does not communicate with a scan tool, HDS, or I/M test equipment, do this troubleshooting procedure.

Scheme 272

Scheme 273

Scheme 274

Scheme 275

Scheme 276

Scheme 277

Scheme 278

1. 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. 9 BACK UP (7.5 A) fuse in the underhood fuse/relay box.
2. 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 (G401).
3. 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 DLC terminal No. 5 and ECM/PCM (E3) or ECM/PCM (A23, A24) and body ground.
4. Turn the ignition switch ON (II).
5. Measure voltage between DLC terminals No. 5 and No. 7. Is there 8.5 V or more? YES - Go to step 10 . NO - Go to step 6.
6. Turn the ignition switch OFF.
7. Disconnect ECM/PCM connector E (31P). Make sure a scan tool or the HDS is disconnected from the DLC.
8. 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 a scan tool or the HDS, and go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 9.
9. 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, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/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 a scan tool or the HDS, and go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) .
10. Turn the ignition switch OFF.
11. Disconnect ECM/PCM connector E (31P). Make sure a scan tool or the HDS is disconnected from the DLC.
12. Turn the ignition switch ON (II).
13. Measure voltage between DLC terminals No. 5 and No. 7. Is there 0 V? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair short to power in the wire between the DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check for a DTC with a scan tool or the HDS, and go to the indicated «DTC'S TROUBLESHOOTING»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) .

2005-2006 models

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.

Scheme 279

Scheme 280

Scheme 281

Scheme 282

Scheme 283

Scheme 284

Scheme 285

1. 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. 9 BACK UP (7.5 A) fuse in the underhood fuse/relay box.
2. 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 (G401).
3. 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.
4. Turn the ignition switch ON (II).
5. 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.
6. Turn the ignition switch OFF.
7. Jump the SCS line with the HDS.
8. Disconnect ECM/PCM connector E (31P).
9. 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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) . NO - Go to step 10.
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, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) .
11. Turn the ignition switch OFF.
12. Jump the SCS line with the HDS.
13. Disconnect ECM/PCM connector E (31P).
14. Turn the ignition switch ON (II).
15. Measure voltage between DLC terminals No. 5 and No. 7. Is there 0 V? YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/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/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system__dtc-troubleshooting) .

Scheme 286

Scheme 287

Scheme 288

Scheme 289

Scheme 290

Scheme 291

1. Relieve fuel pressure (see «FUEL PRESSURE RELIEVING»(/acura/rsx/i-2001-2004/remont/fuel-system/#fuel-supply-system__fuel-pressure-relieving) ).
2. Remove the engine cover.
3. Disconnect the connectors from the injectors (A), and remove the harness holder (B). K20A2/K20Z1 engines K20A3 engine-2002-2004 models K20A3 engine-2005-2006 models
4. Disconnect the quick-connect fittings (C).
5. Remove the fuel rail mounting nuts (D) from the fuel rail (E).
6. Remove the injector clip (F) from the injector (G).
7. Remove the injector from the fuel rail.
8. Coat the new O-rings (A) with clean engine oil, and insert the injectors (B) into the fuel rail (C). K20A2/K20Z1 engines K20A3 engine-2002-2004 models K20A3 engine-2005-2006 models
9. Install the injector clip (D).
10. Coat the injector O-ring (E) with clean engine oil.
11. To prevent damage to the O-ring, install the injectors in the fuel rail first, then install them in the injector base (F).
12. Install the fuel rail mounting nuts.
13. Connect the connectors on the injectors, and install the harness holder.
14. Connect the quick-connect fittings.
15. Turn the ignition switch ON (II), but do not operate the starter. After the fuel pump runs for approximately 2 seconds, the fuel pressure in the fuel line rises. Repeat this two or three times, then check for fuel leakage.
16. Install the engine cover.

A/F Sensor Replacement

Special Tools Required

O2 sensor wrench, Snap-on YA8875, SP Tools 93750, or equivalent, commercially available

Scheme 292

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

Secondary HO2S Replacement

Special Tools Required

O2 sensor wrench, Snap-on YA8875, SP Tools 93750, or equivalent, commercially available

Scheme 293

1. Disconnect the secondary HO2S 4P connector (A), then remove the secondary HO2S (B).
2. Install the secondary HO2S in the reverse order of removal.

Scheme 294

1. Disconnect the CKP sensor 3P connector.
2. Remove the CKP sensor (A).
3. Install the sensor in the reverse order of removal with a new O-ring (B).
4. 2005-2006 models: Do the CKP pattern clear/pattern learn procedure (see «ECM/PCM RESET (2005-2006 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2005-2006-models) ).

Scheme 295

1. When the engine is cool, drain the coolant from the radiator (see «COOLANT CHECK»(/acura/rsx/i-2001-2004/remont/cooling-system-mechanical/#cooling-system) ).
2. Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
3. Disconnect the ECT sensor 2P connector.
4. Remove the ECT sensor (A).
5. Install the sensor in the reverse order of removal with a new O-ring (B).
6. Refill the cooling system (see «COOLANT CHECK»(/acura/rsx/i-2001-2004/remont/cooling-system-mechanical/#cooling-system) ).

Scheme 296

1. Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
2. Disconnect the CMP sensor B 3P connector.
3. Remove CMP sensor B (A) from the exhaust camshaft side of the cylinder head.
4. Install the sensor in the reverse order of removal with a new O-ring (B).

Scheme 297

1. Disconnect the IAT sensor 2P connector.
2. Remove the clip (A) and the IAT sensor (B).
3. Install the sensor in the reverse order of removal.

Scheme 298

1. Remove the intake manifold bracket (A).
2. Disconnect the knock sensor 1P connector.
3. Remove the knock sensor (B).
4. Install the sensor in the reverse order of removal.

Scheme 299

1. Remove the intake manifold (see «INTAKE MANIFOLD REMOVAL AND INSTALLATION»(/acura/rsx/i-2001-2004/remont/exhaust/#intake-manifold-and-exhaust-system) ).
2. Disconnect the knock sensor 1P connector.
3. Remove the knock sensor (A).
4. Install the sensor in the reverse order of removal.

Scheme 300

1. Remove the air cleaner (see «AIR CLEANER REMOVAL/INSTALLATION»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#intake-air-system) ).
2. Disconnect the output shaft (countershaft) speed sensor connector (A).
3. Remove the output shaft (countershaft) speed sensor (B).
4. Install the sensor in the reverse order of removal with a new O-ring (C).

Scheme 301

1. Disconnect the negative cable from the battery.
2. Remove the passenger's dashboard lower cover (A) (see «PASSENGER'S DASHBOARD LOWER COVER REMOVAL/INS»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard) ).
3. Remove the ECM/PCM mounting bolts (B) and the ECM/PCM (C).
4. Install the ECM/PCM in the reverse order of removal.
5. Reconnect the negative cable to the battery.
6. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).

Scheme 302

1. Jump the SCS line with the HDS.
2. Remove the passenger's dashboard lower cover (A) (see «PASSENGER'S DASHBOARD LOWER COVER REMOVAL/INS»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#dashboard) ).
3. Remove the ECM/PCM mounting bolts (B) and the ECM/PCM (C).
4. Install the ECM/PCM in the reverse order of removal.
5. Open the SCS line with the HDS.
6. Turn the ignition switch ON (II). 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.
7. Input the VIN to the ECM/PCM with the HDS.
8. Rewrite the immobilizer code with the ECM/PCM replacement procedure in the HDS; it allows you to start the engine.
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#idle-control-system) ).
11. Do the CKP pattern learn procedure (see «ECM/PCM RESET (2005-2006 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__ecmpcm-reset-2005-2006-models) ).

See also:
• HOW TO UPDATE THE ECM/PCM
• THROTTLE BODY DISASSEMBLY/REASSEMBLY
• ECM/PCM IDLE LEARN PROCEDURE
• COOLANT CHECK
• THROTTLE BODY REMOVAL/INSTALLATION
• CIRCUIT DIAGRAM
• ECM/PCM RESET (2002-2004 MODELS)
• POWER RELAY TEST
• FUEL PRESSURE TEST
• FUEL PRESSURE REGULATOR REPLACEMENT
• VTEC ROCKER ARM TEST
• VALVE CLEARANCE ADJUSTMENT
• SPARK PLUG INSPECTION
• ECM/PCM RESET (2005-2006 MODELS)
• REMOVAL - K20A3 ENGINE
• CAM CHAIN REMOVAL
• CMP PULSE PLATE B REPLACEMENT
• VEHICLE SPEED SIGNAL CIRCUIT TROUBLESHOOTING
• ALTERNATOR REMOVAL AND INSTALLATION
• BATTERY TEST
• GLOVE BOX REMOVAL/INSTALLATION
• ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING
• GENERAL TROUBLESHOOTING INFORMATION
• IGNITION KEY SWITCH TEST
• REAR SEAT REMOVAL/INSTALLATION
• FTP SENSOR REPLACEMENT
• FUEL PRESSURE RELIEVING
• PASSENGER'S DASHBOARD LOWER COVER REMOVAL/INS
• DTC P0107
• DTC P0111, P1116
• DTC P0116
• DTC P0122
• DTC P0123
• DTC P0125
• DTC P0128
• DTC P0128
• DTC P0133, P1163
• DTC P0133
• DTC P0134
• DTC P0135, P1166
• DTC P0139
• DTC P0171, P0172
• DTC P0300, P0301, P0302, P0303, P0304
• DTC P0325
• DTC P0335, P0336, P0339
• DTC P0339
• DTC P0365, P0369, P1361, P1362
• DTC P0369
• DTC P0562
• DTC P0602
• DTC P0603
• DTC P0606
• DTC P0607, P1607
• DTC P0630
• DTC P0685
• DTC P0700
• DTC P0720
• DTC P1106, P2227
• DTC P1107, P1108, P2228, P2229
• DTC P1109
• DTC P1121
• DTC P1122
• DTC P1128
• DTC P1129
• DTC P1164, P2A00
• DTC P1167
• DTC P1172
• DTC P1549
• DTC P16BB
• DTC P2195
• DTC P2227
• DTC P2228
• DTC P2229
• DTC P2270, P2271
• DTC P2610
• DTC P2A00
• DTC'S TROUBLESHOOTING
• A/F SENSOR REPLACEMENT