Pgm-Fi System (K20Z3 Engine): Diagnosis Honda Civic VIII рестайлинг

DTC P050A: Cold Start Idle Air Control System Performance Problem

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

1. Turn the ignition switch to ON (II).
2. Check for Pending or Confirmed or DTCs with the HDS. Are any Pending or Confirmed or DTCs other than P050A indicated? YES -Go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) . NO -Go to step 3.
3. Check for poor connections or a blockage at the air intake duct. Is it OK? YES -Go to step 4. NO -Reconnect or repair the air intake duct, then go to step 19.
4. Check for damage to the air cleaner housing. Is it OK? YES -Go to step 5. NO -Replace the air cleaner housing (see «AIR CLEANER REMOVAL/INSTALLATION»(ref-255502-S32818153342007060300000) ), then go to step 19.
5. Check for dirt or debris in the air cleaner element. Is it dirty? YES -Replace the air cleaner element or remove the debris (see «AIR CLEANER ELEMENT INSPECTION/REPLACEMENT»(ref-255502-S19957176052007060300000) ), then go to step 19. NO -Go to step 6.
6. Let the engine cool until the value of ECT SENSOR 1 is 122°F (50°C) or less.
7. Clear the DTC with the HDS.
8. Start the engine, and let it idle for 10 seconds or more.
9. Monitor the OBD STATUS for DTC P050A in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 10. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body, the MAF sensor/IAT sensor, and the ECM. If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 6 .
10. Do the ETCS TEST in the INSPECTION MENU with the HDS. Is the THROTTLE ACTUATOR CONTROL VALVE normal? YES -Go to step 11. NO -Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-255502-S31582724102007060300000) ), then go to step 19.
11. 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.
12. While holding the engine speed at 2,500 rpm for 30 seconds, check the MAF SENSOR in the DATA LIST with the HDS. Is there about 5.7-8.3 gm/s? YES -Go to step 13. NO -Replace the MAF sensor/IAT sensor (see «MAF SENSOR/IAT SENSOR REPLACEMENT»(ref-355119-S38118255712010012000000) ), then go to step 19.
13. Turn the ignition switch to LOCK (0).
14. Allow the engine to cool to ambient temperature.
15. Note the ambient temperature.
16. Turn the ignition switch to ON (II).
17. Quickly note the value of IAT SENSOR in the DATA LIST with the HDS.
18. Compare the value of the IAT SENSOR and the ambient temperature. Does the value of the IAT SENSOR differ 5.4°F (3°C) or more from the ambient temperature? YES -Replace the MAF sensor/IAT sensor (see «MAF SENSOR/IAT SENSOR REPLACEMENT»(ref-355119-S38118255712010012000000) ), then go to step 19. NO -Check for dirt, carbon, or damage in the throttle bore. If there is dirt or carbon, clean the throttle body (see «THROTTLE BODY CLEANING»(ref-255502-S05877419632007060300000) ), then go to step 19. If there is damage in the throttle bore, replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-255502-S31582724102007060300000) ), then go to step 19.
19. Turn the ignition switch to ON (II).
20. Reset the ECM with the HDS.
21. Do the ECM idle learn procedure (see «ECM IDLE LEARN PROCEDURE»(ref-255526-S39475388272007060300000) ).
22. Let the engine cool until the value of ECT SENSOR 1 is 122°F (50°C) or less.
23. Start the engine, and let it idle for 10 seconds or more.
24. Check for Pending or Confirmed or DTCs with the HDS. Is DTC P050A indicated? YES -Check for poor connections or loose terminals at the throttle body, the MAF sensor/IAT sensor, and the ECM, then go to step 1 . NO -Go to step 25.
25. Monitor the OBD STATUS for DTC P050A in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed or DTCs were indicated in step 24 , go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the throttle body, the MAF sensor/IAT sensor, and the ECM, then go to step 1 . If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 22 .

DTC P050B: Cold Start Ignition Timing Control System Performance Problem

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

1. Turn the ignition switch to ON (II).
2. Check for Pending or Confirmed or DTCs with the HDS. Are any Pending or Confirmed or DTCs other than P050B indicated? YES -Go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) . NO -Go to step 3.
3. Check for poor connections or a blockage at the intake air duct. Is it OK? YES -Go to step 4. NO -Reconnect or repair the intake air duct, then go to step 21 .
4. Check for damage to the air cleaner housing. Is it OK? YES -Go to step 5. NO -Replace the air cleaner housing (see «AIR CLEANER REMOVAL/INSTALLATION»(ref-255502-S32818153342007060300000) ), then go to step 24.
5. Check for dirt or debris in the air cleaner element. Is it dirty? YES -Replace the air cleaner element or remove the debris (see «AIR CLEANER ELEMENT INSPECTION/REPLACEMENT»(ref-255502-S19957176052007060300000) ), then go to step 24. NO -Go to step 6.
6. Let the engine cool until the value of ECT SENSOR 1 is 122°F (50°C) or less.
7. Clear the DTC with the HDS.
8. Start the engine, and let it idle for 10 seconds or more.
9. Monitor the OBD STATUS for DTC P050B in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 10. NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the throttle body, the MAF sensor/IAT sensor, and the ECM. If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 6 .
10. Check the ignition timing (see «IGNITION TIMING INSPECTION»(ref-255507-S12968466832007060300000) ). Is the ignition timing OK? YES -Go to step 12 . NO -Go to step 11.
11. Check for damage at the CKP sensor (see «CKP SENSOR REPLACEMENT»(ref-355119-S17561914012010012000000) ) and the CKP sensor pulser plate (see «CKP PULSE PLATE REPLACEMENT»(ref-255508-S31147090272007060300000) ). Is the CKP sensor and/or the CKP sensor pulser plate damaged? YES -Replace the CKP sensor (see «CKP SENSOR REPLACEMENT»(ref-355119-S17561914012010012000000) ) and/or the CKP sensor pulser plate (see «CKP PULSE PLATE REPLACEMENT»(ref-255508-S31147090272007060300000) ), then go to step 6 . NO -Go to step 27 .
12. Do the ETCS TEST in the INSPECTION MENU with the HDS. Is the THROTTLE ACTUATOR CONTROL VALVE normal? YES -Go to step 13. NO -Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-255502-S31582724102007060300000) ), then go to step 21 .
13. 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.
14. While holding the engine speed at 2,500 rpm, check the MAF SENSOR in the DATA LIST with the HDS. Is there about 5.7-8.3 gm/s? YES -Go to step 15. NO -Replace the MAF sensor/IAT sensor (see «MAF SENSOR/IAT SENSOR REPLACEMENT»(ref-355119-S38118255712010012000000) ), then go to step 21 .
15. Turn the ignition switch to LOCK (0).
16. Allow the sensors to cool to ambient temperature.
17. Note the ambient temperature.
18. Turn the ignition switch to ON (II).
19. Quickly note the value of ECT SENSOR 1 and ECT SENSOR 2 in the DATA LIST with the HDS.
20. Compare the value of ECT SENSOR 1 and the ambient temperature, and the value of ECT SENSOR 2 and the ambient temperature individually. Does either sensor differ more than 5.4°F (3°C) from the ambient temperature? YES -Replace the sensor that differed more than 5.4°F (3°C) from the ambient temperature, then go to step 21 . NO -Check and repair any problems with the following items. Repair or replace them if needed, then go to step 21 . If all the items are OK, go to step 28 . Engine compression and cylinder leakdown VTEC system Engine oil A/C system Power steering
21. Turn the ignition switch to ON (II).
22. Reset the ECM with the HDS.
23. Do the ECM idle learn procedure (see «ECM IDLE LEARN PROCEDURE»(ref-255526-S39475388272007060300000) ).
24. Let the engine cool until the value of ECT SENSOR 1 is 122°F (50°C) or less.
25. Start the engine, and let it idle for 10 seconds or more.
26. Check for Pending or Confirmed or DTCs with the HDS. Is DTC P050B indicated? YES -Check for poor connections or loose terminals at the CKP sensor, the throttle body, the MAF sensor/I AT sensor, ECT sensor 1, ECT sensor 2, and the ECM, then go to step 1 . NO -Go to step 30.
27. Monitor the OBD STATUS for DTC P050B in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -Troubleshooting is complete. If any other Pending or Confirmed or DTCs were indicated in step 26 , go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the CKP sensor, the throttle body, the MAF sensor/IAT sensor, ECT sensor 1, ECT sensor 2, and the ECM, then go to step 1 . If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 24 .
28. Update the ECM if it does not have the latest software (see «ECM UPDATE»(ref-355119-S38923566472010012000000) ), or substitute a known- good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ).
29. Do the ECM idle learn procedure (see «ECM IDLE LEARN PROCEDURE»(ref-255526-S39475388272007060300000) ).
30. Let the engine cool until the value of ECT SENSOR 1 is 122°F (50°C) or less.
31. Start the engine, and let it idle for 10 seconds or more.
32. Check for Pending or Confirmed or DTCs with the HDS. Is DTC P050B indicated? YES -Check for poor connections or loose terminals at the CKP sensor, the throttle body, the MAF sensor/IAT sensor, ECT sensor 1, ECT sensor 2, and the ECM. If the ECM was updated, substitute a known-good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ), then go to step 30 . If the ECM was substituted, go to step 1 . NO -Go to step 36.
33. Monitor the OBD STATUS for DTC P050B in the DTCs MENU with the HDS. Does the screen indicate PASSED? YES -If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM (see «ECM REPLACEMENT»(ref-355119-S26942562032010012000000) ). If any other Pending or Confirmed or DTCs were indicated in step 32 , go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the CKP sensor, the throttle body, the MAF sensor/I AT sensor, ECT sensor 1, ECT sensor 2, and the ECM. If the ECM was updated, substitute a known-good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ), then go to step 30 . If the ECM was substituted, go to step 1 . If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 30 .

DTC P16BB: Alternator B Terminal Circuit Low Voltage

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

1. Turn the ignition switch to ON (II).
2. Clear the DTC with 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 neutral) for 1 minute.
6. Check for Pending or Confirmed or DTCs with the HDS. Is DTC P16BB indicated? YES -Go to step 7. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, and check the battery performance (see «BATTERY TEST»(ref-255511-S39743423472007060300000) ).
7. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box (+B line). Are the connections and terminals OK? YES -Go to step 8. NO -Repair the connectors or terminals, then go to step 9 .
8. Check for an open in the wire (+B line) between the alternator and under-hood fuse/relay box (+B line). Is the harness OK? YES -Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-255505-S13836972742007060300000) ), then go to step 9. NO -Repair open in the wire (+B line) between the alternator and the under-hood fuse/relay box (+B line), then go to step 9.
9. Turn the ignition switch to ON II).
10. Reset the ECM with the HDS.
11. Do the ECM idle learn procedure (see «ECM IDLE LEARN PROCEDURE»(ref-255526-S39475388272007060300000) ).
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 neutral) for 1 minute.
15. Check for Pending or Confirmed or DTCs with the HDS. Is DTC P16BB indicated? YES -Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed or DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) .

DTC P16BC: Alternator FR Terminal Circuit/IGP Circuit Low Voltage

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

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1. Check for poor connections or loose terminals at the alternator 4P connector. Are the connections and the terminals OK? YES -Go to step 2. NO -Repair the connections or the terminals, then go to step 18 .
2. Check the alternator mounting surface for corrosion. Is the mounting surface corroded? YES -Remove the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-255505-S13836972742007060300000) ). Clean all mounting surfaces, reinstall the alternator, then go to step 18 . NO -Go to step 3.
3. Turn the ignition switch to ON (II).
4. Clear the DTC with the HDS.
5. Start the engine.
6. 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
7. Hold the engine speed at 2,000 rpm (in neutral) for 1 minute.
8. Check for Pending or Confirmed or DTCs with the HDS. Is DTC P16BC indicated? YES -Go to step 9. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator.
9. Turn the ignition switch to LOCK (0).
10. Disconnect the alternator 4P connector.
11. Turn the ignition switch to ON (II).
12. Measure the voltage between alternator 4P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 13. NO -Repair open in the wire between the alternator (IG1 line) and the No. 3 ALTERNATOR (10 A) fuse in the under-dash fuse/relay box, then go to step 18 .
13. Measure the voltage between alternator 4P connector terminal No. 4 and body ground. Is there about 5 V? YES -Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-255505-S13836972742007060300000) ), then go to step 18 . NO -Go to step 14.
14. Turn the ignition switch to LOCK (0).
15. Jump the SCS line with the HDS.
16. Disconnect ECM connector B (44P).
17. Check for continuity between alternator 4P connector terminal No. 4 and ECM connector terminal B43. Is there continuity? YES -Go to step 27 . NO -Repair open in the wire between the ECM (B43) and the alternator, then go to step 18.
18. Turn the ignition switch to LOCK (0).
19. Reconnect all connectors.
20. Turn the ignition switch to ON (II).
21. Reset the ECM with the HDS.
22. Do the ECM idle learn procedure (see «ECM IDLE LEARN PROCEDURE»(ref-255526-S39475388272007060300000) ).
23. Start the engine.
24. 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
25. Hold the engine speed 2,000 rpm (in neutral) for 1 minute.
26. Check for Pending or Confirmed or DTCs with the HDS. Is DTC P16BC indicated? YES -Check for poor connections or loose terminals at the alternator and the ECM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed or DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) .
27. Reconnect all connectors.
28. Update the ECM if it does not have the latest software (see «ECM UPDATE»(ref-355119-S38923566472010012000000) ), or substitute a known- good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ).
29. Start the engine.
30. 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
31. Hold the engine speed 2,000 rpm (in neutral) for 1 minute.
32. Check for Pending or Confirmed or DTCs with the HDS. Is DTC P16BC indicated? YES -Check for poor connections or loose terminals at the alternator and the ECM. If the ECM was updated, substitute a known-good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ), then go to step 29 . If the ECM was substituted, go to step 1 . NO -If the ECM was updated, troubleshooting is complete. If the ECM was substituted, replace the original ECM (see «ECM REPLACEMENT»(ref-355119-S26942562032010012000000) ). If any other Pending or Confirmed or DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) .

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

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

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. 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.
4. Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in 3rd Vehicle speed between 25-55 mph (40 - 88 km/h) for 5 minutes Drive at a steady speed between 55-75 mph (88-120 km/h) for 10 seconds, then decelerate (with throttle fully closed) for 5 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, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM. 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 to LOCK (0).
7. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(ref-355119-S25496389092010012000000) ).
8. Turn the ignition switch to ON (II).
9. Reset the ECM with the HDS.
10. Do the ECM idle learn procedure (see «ECM IDLE LEARN PROCEDURE»(ref-255526-S39475388272007060300000) ).
11. Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in 3rd Vehicle speed between 25-55 mph (40-88 km/h) for 5 minutes Drive at a steady speed between 55-75 mph (88-120 km/h) for 10 seconds, then decelerate (with throttle fully closed) for 5 seconds
12. Check for Pending or Confirmed or DTCs with the HDS. Is DTC P2A00 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM, then go to step 1 . 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. If any other Pending or Confirmed or DTCs were indicated in step 12 , go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM, 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 .

DLC Circuit Troubleshooting

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

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1. Turn the ignition switch to LOCK (0).
2. Connect the HDS to the DLC (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-379880-S07149735372010121600000) ). NOTE: Make sure the HDS is properly connected to the DLC.
3. Turn the ignition switch to ON (II), and read the HDS. Does the HDS identify the vehicle? YES -Go to step 4. NO -Go to step 25 .
4. Check for Pending or Confirmed or DTCs in the PGM-FI system with the HDS. Are any Pending or Confirmed or DTCs indicated? YES -Go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) . NO -Go to step 5.
5. Turn the ignition switch to LOCK (0).
6. Turn the ignition switch to ON (II), and watch the SRS indicator. Does the SRS indicator come on and go off? YES - With VSA: Go to step 7. With VSA : Go to step 9 . NO -Go to the SRS general troubleshooting information (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-355131-S02185176432010012000000) ).
7. Turn the ignition switch to LOCK (0).
8. Turn the ignition switch to ON (II), and watch the ABS indicator. Does the ABS indicator come on and go off? YES -Go to step 11 . NO -Go to the ABS symptom troubleshooting for ABS indicator and brake system indicator do not go off (see «ABS INDICATOR AND BRAKE SYSTEM INDICATOR DO NOT GO OFF»(ref-355130-S15003054402010012000000) ).
9. Turn the ignition switch to LOCK (0).
10. Turn the ignition switch to ON (II), and watch the VSA indicator. Does the VSA indicator stay on? YES -Go to the VSA system's general troubleshooting information (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-355128-S17660990272010012000000) ). NO -Go to step 11.
11. Turn the ignition switch to LOCK (0).
12. Start the engine, and watch the EPS indicator. Does the EPS indicator stay on? YES -Go to step 13. NO -Go to the EPS system's general troubleshooting information (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-355129-S15897766592010012000000) ).
13. Turn the ignition switch to LOCK (0).
14. Turn the ignition switch to ON (II), and watch the immobilizer indicator. Does the immobilizer indicator stay on or flash? YES -Go to the immobilizer system's troubleshooting (see «SYMPTOM TROUBLESHOOTING INFORMATION»(ref-255544-S07295218302007060300000) ). NO - With TPMS: Go to step 15. Without TPMS: Go to step 17 .
15. Turn the ignition switch to LOCK (0).
16. Turn the ignition switch to ON (II), and watch the TPMS indicator. Does the TPMS indicator stay on? YES -Go to the TPMS indicator system's troubleshooting (see «SYSTEM INDICATOR»(ref-355132-S15429568622010012000000) ). NO -Go to step 17.
17. Do the gauge self-diagnostic function (see «SELF-DIAGNOSTIC FUNCTION»(ref-255518-S41907643282007060300000) ).
18. Check for B-CAN system DTCs without the HDS (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-255545-S23961313932007060300000) ). Are any B-CAN DTCs indicated? YES -Go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355119-S39784062052010012000000) . NO -Go to step 19.
19. Turn the ignition switch to LOCK (0), then do the battery terminal disconnection procedure, and wait at least 3 minutes before continuing.
20. Disconnect the HDS from the DLC.
21. Check for continuity between DLC terminal No. 7 and body ground. Is there continuity? YES -Go to step 22. NO -Go to step 23 .
22. Continue to check for continuity between DLC terminal No. 7 and body ground, while disconnecting these connectors, one at a time: SRS unit connector A (28P) ABS modulator-control unit 25P connector (with ABS) VSA modulator-control unit 37P connector (with VSA system) EPS control unit connector D (28P) Immobilizer-keyless control unit 7P connector TPMS control unit 20P connector (with TPMS) Audio unit 17P connector Under-dash fuse/relay box Q (16P) connector Does continuity go away when one of the above components is disconnected? YES -Replace the part that caused an open when it was disconnected. NO -Repair short in the wire between the DLC (K- line) and the ABS modulator-control unit (with ABS), the VSA modulator-control unit (with VSA system), the SRS unit, the EPS control unit, the immobilizer-keyless control unit, the TPMS control unit (with TPMS), the audio unit, or the under-dash fuse/relay box.
23. Connect DLC terminal No. 7 to body ground with a jumper wire.
24. Check for continuity between body ground and these connector terminals: CONNECTOR TERMINAL CHART Connector Terminal SRS unit A(28P) No. 24 (LT BLU) ABS modulator-control unit 25P (with ABS) No. 10 (LT BLU) VSA modulator-control unit 37P (with VSA system) No. 26 (LT BLU) EPS control unit D (28P) No. 17 (LT BLU) Immobilizer-keyless control unit 7P No. 5 (LT BLU) TPMS control unit 20P No. 7 (LT BLU) Audio unit 17P No. 6 (LT BLU) Under-dash fuse/relay box Q (16P) No. 8 (LT BLU) Is there continuity between the body ground and each of the terminals in the chart? YES -Replace the unit that does not communicate with the HDS. NO -Repair open in the wire between the DLC (K- line) and the appropriate connector.
25. Do the gauge self-diagnostic function (see «SELF-DIAGNOSTIC FUNCTION»(ref-255518-S41907643282007060300000) ).
26. Check for B-CAN system DTCs without the HDS (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-255545-S23961313932007060300000) ). Is DTC B1168, B1169, and/or B1178 indicated? YES -Go to step 37. NO -Go to step 27.
27. Turn the ignition switch to LOCK (0).
28. Disconnect the HDS from the DLC.
29. Measure the voltage between DLC terminal No. 16 and body ground. Is there battery voltage? YES -Go to step 30. NO -Repair open in the wire between DLC terminal No. 16 and the No. 23 BACK UP (10 A) fuse in the under-hood fuse/relay box.
30. Measure the voltage between DLC terminals No. 4 and No. 16. Is there battery voltage? YES -Go to step 31. NO -Repair open in the wire between DLC terminal No. 4 and body ground (G502) (see «DASHBOARD WIRE HARNESS (VIEW OF PASSENGER'S SIDE)»(ref-355127-S29826654372010012000000) ).
31. Connect the HDS to the DLC (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-379880-S07149735372010121600000) ).
32. Jump the SCS line with the HDS.
33. Disconnect ECM connector A (44P).
34. Disconnect the HDS from the DLC.
35. Check for continuity between ECM connector terminal A36 and DLC terminal No. 6. Is there continuity? YES -Go to step 36. NO -Repair open in the wire between DLC terminal No. 6 and the ECM (A36).
36. Check for continuity between ECM connector terminal A37 and DLC terminal No. 14. Is there continuity? YES -Reconnect all connectors, then update the ECM if it does not have the latest software (see «ECM UPDATE»(ref-355119-S38923566472010012000000) ), or substitute a known- good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ), then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM (see «ECM REPLACEMENT»(ref-355119-S26942562032010012000000) ). NO -Repair open in the wire between DLC terminal No. 14 and the ECM (A37)
37. Try to start the engine. Does the engine start and idle smoothly? YES -Go to the «F-CAN CIRCUIT TROUBLESHOOTING»(ref-355119-S16501946572010012000000) . NO -Go to step 38.
38. Turn the ignition switch to LOCK (0).
39. Check the No. 2 IG MAIN (50 A) fuse in the under- hood fuse/relay box. Is the fuse OK? YES -Repair open in the wire between the No. 2 IG MAIN (50 A) fuse and the ignition switch. If the wire is OK, go to step 40. NO -Repair short in the wire between the No. 2 IG MAIN (50 A) fuse and the under-hood fuse/relay box. Also replace the No. 2 IG MAIN (50 A) fuse.
40. Inspect the No. 19 Fl MAIN (15 A) fuse in the under- hood fuse/relay box. Is the fuse OK? YES -Go to step 47 . NO -Go to step 41.
41. Remove the blown No. 19 Fl MAIN (15 A) fuse from the under-hood fuse/relay box.
42. Remove PGM-FI main relay 1 (C) from the under- hood fuse/relay box.
43. Check for continuity between body ground and PGM-FI main relay 1 4P connector terminals No. 1 and No. 3 individually. Is there continuity? YES -Replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(ref-255542-S37835188672007060300000) ). Also replace the No. 19 Fl MAIN (15 A) fuse. NO -Go to step 44.
44. Disconnect each of the components or connectors from these components, one at a time, and check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and body ground. PGM-FI main relay 2 (FUEL PUMP) ECM connector A (44P) Each injector 2P connector Camshaft position (CMP) sensor B 3P connector Crankshaft position (CKP) sensor 3P connector Ignition coil relay Electronic throttle control system (ETCS) control relay Does continuity go away when one of the above components is disconnected? YES -Replace the component that made the short to body ground go away when disconnected. Reconnect all connectors, then update the ECM if it does not have the latest software (see «ECM UPDATE»(ref-355119-S38923566472010012000000) ), or substitute a known-good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ), then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM (see «ECM REPLACEMENT»(ref-355119-S26942562032010012000000) ). Also replace the No. 19 Fl MAIN (15 A) fuse. NO -Go to step 45.
45. Disconnect the connectors from these components: PGM-FI main relay 2 (FUEL PUMP) ECM connector A (44P) Injectors Camshaft position (CMP) sensor B Crankshaft position (CKP) sensor Ignition coil relay Electronic throttle control system (ETCS) control relay
46. Check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and body ground. Is there continuity? YES -Repair short in the wire between PGM-FI main relay 1 and each item. Also replace the No. 19 FI MAIN (15A) fuse. NO -Replace PGM-FI main relay 1. Also replace the No. 19 Fl MAIN (15 A) fuse.
47. Inspect the No. 2 FUEL PUMP (15 A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES -Go to step 58 . NO -Go to step 48.
48. Remove the blown No. 2 FUEL PUMP (15 A) fuse from the under-dash fuse/relay box.
49. Remove PGM-FI main relay 2 (FUEL PUMP) (A) from the under-dash fuse/relay box.
50. Test PGM-FI main relay 2 (FUEL PUMP) (see «POWER RELAY TEST»(ref-255512-S41789995632007060300000) ). Is the relay OK? YES -Go to step 51. NO -Replace PGM-FI main relay 2 (FUEL PUMP). Also replace the No. 2 FUEL PUMP (15 A) fuse.
51. Check for continuity between PGM-FI main relay 2 (FUEL PUMP) 4P connector terminal No. 1 and body ground. Is there continuity? YES -Go to step 52. NO -Go to step 54 .
52. Jump the SCS line with the HDS, then disconnect ECM connector C (44P).
53. Check for continuity between ECM connector terminal C36 and body ground. Is there continuity? YES -Repair short in the wire between the No. 2 FUEL PUMP (15 A) fuse and the ECM (C36), between the No. 2 FUEL PUMP (15 A) fuse and PGM-FI main relay 2 (FUEL PUMP), or between the No. 2 FUEL PUMP (15 A) fuse and the immobilizer control unit. Also replace the No. 2 FUEL PUMP (15 A) fuse. NO -Replace the No. 2 FUEL PUMP (15 A) fuse, and update the ECM if it does not have the latest software (see «ECM UPDATE»(ref-355119-S38923566472010012000000) ), or substitute a known- good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ), then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM (see «ECM REPLACEMENT»(ref-355119-S26942562032010012000000) ).
54. Remove the rear cushion seat (see «SEAT CUSHION»(ref-255546-S42797725602007060300000) ).
55. Remove the rear floor upper cross-member, and the access panel from the floor (see «FUEL TANK UNIT REMOVAL/INSTALLATION»(ref-255500-S07449026582007060300000) ).
56. Disconnect the fuel pump 4P connector.
57. Check for continuity between fuel pump 4P connector terminal No. 2 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. 2 FUEL PUMP (15 A) fuse. NO -Check the fuel pump, and replace it if needed (see «FUEL PUMP/FUEL GAUGE SENDING UNIT REPLACEMENT»(ref-255500-S36245467122007060300000) ). Also replace the No. 2 FUEL PUMP (15 A) fuse.
58. Jump the SCS line with the HDS.
59. Disconnect ECM connectors A (44P) and C (44P).
60. Turn the ignition switch to ON (II).
61. Measure the voltage between ECM connector terminal C36 and body ground. Is there battery voltage? YES -Go to step 62. NO -Repair open in the wire between the No. 2 FUEL PUMP (15 A) fuse and the ECM (C36).
62. Measure the voltage between ECM connector terminal A6 and body ground. Is there battery voltage? YES -Go to step 67 . NO -Go to step 63.
63. Turn the ignition switch to LOCK (0).
64. Remove PGM-FI main relay 1 (C) from the under- hood fuse/relay box.
65. Measure the voltage between PGM-FI main relay 1 4P connector terminal No. 3 and body ground. Is there battery voltage? YES -Go to step 66. NO -Replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(ref-255542-S37835188672007060300000) ).
66. Check for continuity between PGM-FI main relay 1 4P connector terminal No. 4 and ECM connector terminal A6. Is there continuity? YES -Test PGM-FI main relay 1 (see «POWER RELAY TEST»(ref-255512-S41789995632007060300000) ). If the relay is OK, update the ECM if it does not have the latest software (see «ECM UPDATE»(ref-355119-S38923566472010012000000) ), or substitute a known-good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ), then recheck. If the symptom/indication goes away with a known- good ECM, replace the original ECM (see «ECM REPLACEMENT»(ref-355119-S26942562032010012000000) ). NO -Repair open in the wire between the ECM (A6) and PGM-FI main relay 1.
67. Turn the ignition switch to LOCK (0).
68. Remove PGM-FI main relay 1 (C) from the under- hood fuse/relay box.
69. Measure the voltage between PGM-FI main relay 1 4P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 70. NO -Replace the under-hood fuse/relay box (see «REMOVAL AND INSTALLATION»(ref-255542-S37835188672007060300000) ).
70. Check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and ECM connector terminal A8. Is there continuity? YES -Go to step 71. NO -Repair open in the wire between the ECM (A8) and PGM-FI main relay 1.
71. Test PGM-FI main relay 1 (see «POWER RELAY TEST»(ref-255512-S41789995632007060300000) ). Is PGM-FI main relay 1 OK? YES -Go to step 72. NO -Replace PGM-FI main relay 1.
72. Disconnect ECM connector B (44P).
73. Check for continuity between body ground and ECM connector terminals B1, B36, C2, C40, and C44 individually. Is there continuity? YES -Go to step 74. NO -Repair open in the wire between the ECM (B1, B36, C2, C40, C44) and G101 (see «ENGINE WIRE HARNESS (SI MODEL)»(ref-355127-S18482176522010012000000) ).
74. Check for continuity between ECM connector terminal C13 and body ground. Is there continuity? YES -Go to step 75. NO -Go to step 76.
75. Continue to check for continuity between ECM connector terminal C13 and body ground, while disconnecting the MAP sensor 3P connector. Is there continuity? YES -Repair short in the wire between the ECM (C13) and the MAP sensor. NO -Replace the MAP sensor (see «MAP SENSOR REPLACEMENT»(ref-355119-S38467068872010012000000) ).
76. Check for continuity between ECM connector terminal B18 and body ground. Is there continuity? YES -Go to step 77. NO -Go to step 78 .
77. Continue to check for continuity between ECM connector terminal B18 and body ground, while disconnecting the output shaft (countershaft) speed sensor 3P connector. Is there continuity? YES -Repair short in the wire between the ECM (B18) and the output shaft (countershaft) speed sensor. NO -Replace the output shaft (countershaft) speed sensor (see «OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR REPLACEMENT»(ref-355119-S42558245742010012000000) ).
78. Check for continuity between ECM connector terminal C12 and body ground. Is there continuity? YES -Go to step 79. NO -Go to step 80 .
79. Continue to check for continuity between ECM connector terminal C12 and body ground, while disconnecting the throttle body 6P connector. Is there continuity? YES -Repair short in the wire between the ECM (C12) and the throttle body. NO -Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-255502-S31582724102007060300000) ).
80. Check for continuity between ECM connector terminal A25 and body ground. Is there continuity? YES -Go to step 81. NO -Go to step 82 .
81. Continue to check for continuity between ECM connector terminal A25 and body ground, while disconnecting the APP sensor 6P connector. Is there continuity? YES -Repair short in the wire between the ECM (A25) and the APP sensor. NO -Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL/INSTALLATION»(ref-255551-S00594059932007060300000) ).
82. Check for continuity between ECM connector terminal A24 and body ground. Is there continuity? YES -Go to step 83. NO -Go to step 84 .
83. Continue to check for continuity between ECM connector terminal A24 and body ground, while disconnecting the APP sensor 6P connector. Is there continuity? YES -Repair short in the wire between the ECM (A24) and the APP sensor. NO -Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL/INSTALLATION»(ref-255551-S00594059932007060300000) ).
84. Check for continuity between ECM connector terminal A19 and body ground. Is there continuity? YES -Go to step 85. NO -Reconnect all connectors, then update the ECM if it does not have the latest software (see «ECM UPDATE»(ref-355119-S38923566472010012000000) ), or substitute a known-good ECM (see «SUBSTITUTING THE ECM»(ref-379880-S34678618312010121600000) ), then recheck. If the symptom/indication goes away with a known-good ECM, replace the original ECM (see «ECM REPLACEMENT»(ref-355119-S26942562032010012000000) ).
85. Continue to check for continuity between ECM connector terminal A19 and body ground, while disconnecting these connectors, one at a time: A/C pressure sensor 3P connector FTP sensor 3P connector Does continuity go away when one of the above components is disconnected? YES -Replace the part that caused an open when it was disconnected. NO -Repair short in the wire between the ECM (A19) and the A/C pressure sensor or the FTP sensor.

Scheme 644

Scheme 645

1. Relieve fuel pressure (see «FUEL PRESSURE RELIEVING»(ref-255500-S35018442732007060300000) ).
2. Remove the engine cover.
3. Disconnect the injector connectors (A) from the injectors.
4. Remove the ground cable bolt (G101) (B).
5. Disconnect the quick-connect fitting (C).
6. Remove the fuel rail mounting nuts (D) from the fuel rail (E).
7. Remove the fuel rail and the injectors from the injector base.
8. Remove the injector clips (F) from the injectors.
9. Remove the injectors from the fuel rail.
10. Coat the new O-rings (A) with clean engine oil, and insert the injectors (B) into the fuel rail (C).
11. Install the injector clips (D).
12. Coat the injector O-rings (E) with clean engine oil.
13. Install the fuel rail and the injectors in the injector base (F).
14. Install the fuel rail mounting nuts (G).
15. Connect the connectors on the injectors, and reinstall the ground cable bolt (G101).
16. Connect the quick-connect fitting.
17. Turn the ignition switch to ON (II), but do not operate the starter. After the fuel pump runs for about 2 seconds, the fuel rail is pressurized. Repeat this two or three times, then check for fuel leakage.
18. Install the engine cover.