Pgm-Fi System (R18A1 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 DTCs with the HDS. Are any Pending or Confirmed DTCs other than P050A indicated? YES -Go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) . 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 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 ELEMENT INSPECTION/REPLACEMENT»(ref-255501-S41739307232007060300000) ), 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-255501-S41739307232007060300000) ), 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/PCM. If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 6 and recheck.
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-255501-S04265565202007060300000) ), then go to step 19 .
11. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.
12. While holding the engine speed at 2,500 rpm, check the MAF SENSOR in the DATA LIST with the HDS. Is there about 5.4-7.8 (M/T model) or 5.9-8.5 (A/T model) gm/s? YES -Go to step H. NO -Replace the MAF sensor/IAT sensor (see «MAF SENSOR/IAT SENSOR REPLACEMENT»(ref-355126-S04122736152010012000000) ), 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-355126-S04122736152010012000000) ), then go to step 20. NO -Check for dirt, carbon, or damage in the throttle bore. If there is dirt or carbon, clean the throttle body (see «AIR CLEANER ELEMENT INSPECTION/REPLACEMENT»(ref-255501-S41739307232007060300000) ), then go to step 20. If there is damage in the throttle bore, replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-255501-S04265565202007060300000) ), then go to step 20.
19. Turn the ignition switch to ON (II).
20. Reset the ECM/PCM with the HDS.
21. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-255517-S24591238122007060300000) ).
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 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/PCM, then go to step 1 . NO -Go to step 26.
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 DTCs were indicated in step 24 , go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) . 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/PCM, then go to step 1 . If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 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 DTCs with the HDS. Are any Pending or Confirmed DTCs other than P050B indicated? YES -Go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) . 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 ELEMENT INSPECTION/REPLACEMENT»(ref-255501-S41739307232007060300000) ), then go to step 21 .
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-255501-S41739307232007060300000) ), then go to step 21 . 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 CKP sensor, the throttle body, the MAF sensor/IAT sensor, ECT sensor 1, ECT sensor 2, and the ECM/PCM. If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 6 and recheck.
10. Check the ignition timing (see «IGNITION TIMING INSPECTION»(/honda/civic/viii-2008-2011/remont/ignition-system/#ignition-system-r18a1-engine) ). 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-355126-S30056044322010012000000) ) and the CKP sensor pulser plate (see «CRANKSHAFT AND PISTON REMOVAL»(ref-255533-S31147131582007060300000) ). Is the CKP sensor and/or the CKP sensor pulser plate damaged? YES -Replace the CKP sensor (see «CKP SENSOR REPLACEMENT»(ref-355126-S30056044322010012000000) ) and/or the CKP sensor pulser plate (see «CRANKSHAFT AND PISTON REMOVAL»(ref-255533-S31147131582007060300000) ), 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-255501-S04265565202007060300000) ), then go to step 21 .
13. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T 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 5.4-7.8 (M/T model) or 5.9-8.5 (A/T model) gm/s? YES -Go to step 16. NO -Replace the MAF sensor/IAT sensor (see «MAF SENSOR/IAT SENSOR REPLACEMENT»(ref-355126-S04122736152010012000000) ), 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 25. NO -Check and repair any problems with the following items. Repair or replace them if needed, then go to step 25. 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/PCM with the HDS.
23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-255517-S24591238122007060300000) ).
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 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/PCM, then go to step 1 . NO -Go to step 31.
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 DTCs were indicated in step 26 , go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) . 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/PCM, then go to step 1 . If the screen indicates EXECUTING, keep idling until a result comes on. If the screen indicates OUT OF CONDITION, go to step 24 .
28. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-355126-S21746322412010012000000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ).
29. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-255517-S24591238122007060300000) ).
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 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/IAT sensor, ECT sensor 1, ECT sensor 2, and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ), then go to step 30 . If the ECM/PCM 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/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-355126-S35548339322010012000000) ). If any other Pending or Confirmed DTCs were indicated in step 32 , go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) . NO -If the screen indicates FAILED, check for poor connections or loose terminals at the CKP sensor, the throttle body, the MAF/IAT sensor, ECT sensor 1, ECT sensor 2, and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ), then go to step 30 . If the ECM/PCM 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 P060A: PCM (A/T system) Internal Control Module Malfunction

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. Check for Pending or Confirmed DTCs with the HDS. Is DTC P060A indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time.
4. Update the PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-355126-S21746322412010012000000) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ).
5. Check for Pending or Confirmed DTCs with the HDS. Is DTC P060A indicated? YES -If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ), then recheck. If the PCM was substituted, go to step 1 . NO -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «ECM/PCM REPLACEMENT»(ref-355126-S35548339322010012000000) ). If any other Pending or Confirmed DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) .

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 (A/T in P or N, M/T in neutral) for 1 minute.
6. Check for Pending or Confirmed 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 the terminals OK? YES -Go to step 8. NO -Repair the connections or the terminals, then go to step 9 .
8. Check for an open in the wire (+B line) between the alternator and the under-hood fuse/relay box (+B line). Is the harness OK? YES -Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-255504-S07514351882007060300000) ), 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/PCM with the HDS.
11. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-255517-S24591238122007060300000) ).
12. Start the engine.
13. Check under these conditions: A/Con 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 (A/T in P or N, M/T in neutral) for 1 minute.
15. Check for Pending or Confirmed 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 DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) .

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 ).

Scheme 715

Scheme 716

Scheme 717

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 surfaces for corrosion. Are the mounting surfaces corroded? YES -Remove the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-255504-S07514351882007060300000) ). Clean all mounting surfaces, then reinstall the alternator, and 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/Con 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 (A/T in P or N, M/T in neutral) for 1 minute.
8. Check for Pending or Confirmed 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-255504-S07514351882007060300000) ), 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/PCM connector B (44P).
17. Check for continuity between alternator 4P connector terminal No. 4 and ECM/PCM connector terminal B43. Is there continuity? YES -Go to step 27 . NO -Repair open in the wire between the ECM/PCM (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/PCM with the HDS.
22. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-255517-S24591238122007060300000) ).
23. Start the engine.
24. Check under these conditions: A/Con Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
25. Hold the engine speed at 2,000 rpm (A/T in P or N, M/T in neutral) for 1 minute.
26. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16BC indicated? YES -Check for poor connections or loose terminals at the alternator and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) .
27. Reconnect all connectors.
28. Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-355126-S21746322412010012000000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ).
29. Start the engine.
30. Check under these conditions: A/Con Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
31. Hold the engine speed at 2,000 rpm (A/T in P or N, M/T in neutral) for 1 minute.
32. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16BC indicated? YES -Check for poor connections or loose terminals at the alternator and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ), then go to step 29 . If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-355126-S35548339322010012000000) ). If any other Pending or Confirmed DTCs are indicated, go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) .

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 (A/T in P or N, M/T 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) A/T in D, M/T 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 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, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 3 and recheck.
6. Turn the ignition switch to LOCK (0).
7. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(ref-355126-S08441688102010012000000) ).
8. Turn the ignition switch to ON (II).
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-255517-S24591238122007060300000) ).
11. Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) A/T in D, M/T 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 4 seconds
12. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2A00 indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM, then go to step 1 . NO -Go to step 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 DTCs were indicated in step 12 , go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) . 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 .

DLC Circuit Troubleshooting

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

Scheme 718

Scheme 719

Scheme 720

Scheme 721

Scheme 722

Scheme 723

Scheme 724

Scheme 725

Scheme 726

Scheme 727

Scheme 728

Scheme 729

Scheme 730

Scheme 731

Scheme 732

Scheme 733

Scheme 734

Scheme 735

Scheme 736

Scheme 737

Scheme 738

Scheme 739

Scheme 740

Scheme 741

Scheme 742

Scheme 743

Scheme 744

Scheme 745

Scheme 746

1. Turn the ignition switch to LOCK (0).
2. Connect the HDS to the DLC (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-379879-S07721642542010121600000) ). 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 DTCs in the PGM-FI system with the HDS. Are any Pending or Confirmed DTCs indicated? YES -Go to the «INDICATED DTC'S TROUBLESHOOTING»(ref-355126-S38482784232010012000000) . 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 stay on? YES -Go to the SRS general troubleshooting information (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-355131-S02185176432010012000000) ). NO - With ABS: Go to step 7. With VSA: Go to step 9 .
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 stay on? YES -Go to the ABS general troubleshooting information (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-355130-S12211095132010012000000) ). NO - With EPS: Go to step 11 . Without EPS: Go to step 13 .
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 - With EPS: Go to step 11. Without EPS: Go to step 13 .
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 the EPS system's general troubleshooting information (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-355129-S15897766592010012000000) ). NO -Go to step 13.
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»(ref-255544-S17127033162007060300000) ). 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-355126-S38482784232010012000000) . NO -Go to step 19.
19. Turn the ignition switch to LOCK (0).
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) 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 EPS control unit connector D (28P) (with EPS) Does continuity go away when one of the above parts 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), the SRS 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) No. 26 (LT BLU) Immobilizer-keyless control unit 7P No. 5 (LT BLU) TPMS control unit 20P (with TPMS) No. 7 (LT BLU) Audio unit 17P No. 6 (LT BLU) Under-dash fuse/relay box Q 16P No. 8 (LT BLU) EPS control unit D (28P) (with EPS) No. 17 (LT BLU) Is there continuity between body ground and each of the terminals in the chart? YES -Replace the part 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 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-379879-S07721642542010121600000) ).
32. Jump the SCS line with the HDS.
33. Disconnect ECM/PCM connector A (44P).
34. Disconnect the HDS from the DLC.
35. Check for continuity between ECM/PCM 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/PCM (A36).
36. Check for continuity between ECM/PCM connector terminal A37 and DLC terminal No. 14. Is there continuity? YES -Reconnect all connectors, then update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away and the ECM/PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the ECM/PCM was substituted, replace the original ECM/PCM. NO -Repair open in the wire between DLC terminal No. 14 and the ECM/PCM (A37).
37. Try to start the engine. Does the engine start and idle smoothly? YES -Go to the «F-CAN CIRCUIT TROUBLESHOOTING»(ref-355126-S16826692702010012000000) . NO -Go to step 40.
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 B 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 «POWER RELAY TEST»(ref-255512-S41789995632007060300000) ). Also replace the No. 19 Fl MAIN (15 A) fuse. NO -Go to step 44.
44. Disconnect each of the parts or connectors below, one at a time, while checking for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and body ground. PGM-FI main relay 2 (FUEL PUMP) ECM/PCM connector A (44P) Each injector 2P connector Camshaft position (CMP) sensor 3P connector Crankshaft position (CKP) sensor 3P connector Electronic throttle control system (ETCS) control relay Does continuity go away when one of the above parts is disconnected? YES -Replace the part that made the short to body ground go away when disconnected. Reconnect all connectors, then update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-355126-S21746322412010012000000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-355126-S35548339322010012000000) ). Also replace the No. 19 FI MAIN (15A)fuse. NO -Go to step 45.
45. Disconnect the connectors from these parts: PGM-FI main relay 2 (FUEL PUMP) ECM/PCM connector A (44P) Injectors Camshaft position (CMP) sensor 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 part. 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/PCM connector C (44P).
53. Check for continuity between ECM/PCM 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/PCM (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/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-355126-S21746322412010012000000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-355126-S35548339322010012000000) ).
54. Remove the rear seat cushion (see «REAR SEAT REMOVAL/INSTALLATION»(ref-255546-S37705803522007060300000) ).
55. Remove the rear floor upper cross-member and the access panel from the floor (see «FUEL TANK UNIT REMOVAL/INSTALLATION»(ref-255499-S01394163022007060300000) ).
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-255499-S18866934592007060300000) ). Also replace the No. 2 FUEL PUMP (15 A) fuse.
58. Jump the SCS line with the HDS.
59. Disconnect ECM/PCM connectors A (44P) and C (44P).
60. Turn the ignition switch to ON (II).
61. Measure the voltage between ECM/PCM 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/PCM (C36).
62. Measure the voltage between ECM/PCM 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 «POWER RELAY TEST»(ref-255512-S41789995632007060300000) ).
66. Check for continuity between PGM-FI main relay 1 4P connector terminal No. 4 and ECM/PCM 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/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-355126-S21746322412010012000000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-355126-S35548339322010012000000) ). NO -Repair open in the wire between the ECM/PCM (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 «POWER RELAY TEST»(ref-255512-S41789995632007060300000) ).
70. Check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and ECM/PCM connector terminal A8. Is there continuity? YES -Go to step 71. NO -Repair open in the wire between the ECM/PCM (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/PCM connector B (44P).
73. Check for continuity between body ground and ECM/PCM 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/PCM (B1, B36, C2, C40, C44) and G101; A/T model (see «ENGINE WIRE HARNESS (A/T)»(ref-355127-S21303084912010012000000) ), M/T model (see «ENGINE WIRE HARNESS (M/T EXCEPT SI MODEL)»(ref-355127-S20557236402010012000000) ).
74. Check for continuity between ECM/PCM 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/PCM connector terminal C13 and body ground, while disconnecting these connectors, one at a time: MAP sensor 3P connector Rocker arm oil pressure sensor (EOP sensor) 3P connector ('06 model) Output shaft (countershaft) speed sensor 3P connector Does continuity go away when one of the above parts is disconnected? YES -Replace the part that caused an open when it was disconnected. NO -Repair short in the wire between the ECM/PCM (C13) and the MAP sensor, the rocker arm oil pressure sensor (EOP sensor) ('06 model), or the output shaft (countershaft) speed sensor.
76. Check for continuity between ECM/PCM 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/PCM connector terminal B18 and body ground, while disconnecting these connectors, one at a time: IMT actuator 5P connector EGR valve 6P connector Rocker arm oil pressure sensor (EOP sensor) 3P connector ('07-10 models) Input shaft (mainshaft) speed sensor 3P connector Does continuity go away when one of the above parts is disconnected? YES -Replace the part that caused an open when it was disconnected. NO -Repair short in the wire between the ECM/PCM (B18) and the IMT actuator, the EGR valve, the rocker arm oil pressure sensor (EOP sensor) ('07-10 models), or the input shaft (mainshaft) speed sensor.
78. Check for continuity between ECM/PCM 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/PCM 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/PCM (C12) and the throttle body. NO -Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-255501-S04265565202007060300000) ).
80. Check for continuity between ECM/PCM 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/PCM 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/PCM (A25) and the APP sensor. NO -Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL/INSTALLATION»(ref-255538-S18075070752007060300000) ).
82. Check for continuity between ECM/PCM 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/PCM 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/PCM (A24) and the APP sensor. NO -Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL/INSTALLATION»(ref-255538-S18075070752007060300000) ).
84. Check for continuity between ECM/PCM connector terminal A19 and body ground. Is there continuity? YES -Go to step 85. NO -Update the ECM/PCM if it does not have the latest software (see «ECM/PCM UPDATE»(ref-355126-S21746322412010012000000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-379879-S00676494072010121600000) ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-355126-S35548339322010012000000) ).
85. Continue to check for continuity between ECM/PCM 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 connectors is disconnected? YES -Replace the part that caused an open when it was disconnected. NO -Repair short in the wire between the ECM/PCM (A19) and the A/C pressure sensor or the FTP sensor.

Scheme 747

Scheme 748

1. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(ref-255499-S41902108312007060300000) ).
2. Remove the cowl cover and the under-cowl panel (see «COWL COVER REPLACEMENT»(ref-255527-S15281345902007060300000) ).
3. Remove the fuel line cover (A).
4. Disconnect the injector connectors (B) from the injectors and the rocker arm oil control valve connector (C).
5. Disconnect the quick-connect fitting (D).
6. Remove the fuel rail mounting nuts (E) from the fuel rail (F).
7. Remove the injector clips (G) from the injectors.
8. Remove the injectors from the fuel rail.
9. Coat the new O-rings (A) with clean engine oil, and insert the injectors (B) into the fuel rail (C).
10. Install the injector clips (D).
11. Coat the new injector O-rings (E) with clean engine oil.
12. Install the fuel rail and the injectors into the cylinder head (F).
13. Install the fuel rail mounting nuts.
14. Connect the connectors on the injectors.
15. Connect the quick-connect fittings.
16. 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.
17. Install the fuel line cover.
18. Install the cowl cover and the under-cowl panel (see «COWL COVER REPLACEMENT»(ref-255527-S15281345902007060300000) ).

See also:
• CIRCUIT DIAGRAM
• SPARK PLUG INSPECTION