Pgm-Fi System: Diagnosis Acura MDX II facelift

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-510432-S17608727802012102300000) . NO -Go to step 3.
3. Check for poor connections or a blockage in 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 REMOVAL/INSTALLATION»(ref-510444-S34860790982012102300000) ), 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 REMOVAL/INSTALLATION»(ref-510444-S34860790982012102300000) ), then go to step 19 . NO -Go to step 6.
6. Let the engine cool until the value of EGT SENSOR 1 is 131 °F (55 °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 HDS indicate FAILED? YES -Go to step 10. NO -If the HDS 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 PCM. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS 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-510444-S04768306062012102300000) ), then go to step 19 .
11. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) 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 9.8-11.9 gm/s? YES -Go to step 13. NO -Replace the MAF sensor/IAT sensor (see «MAF SENSOR/IAT SENSOR REPLACEMENT»(ref-510432-S23376976682012102300000) ), then go to step 19 .
13. Turn the ignition switch to LOCK (0).
14. Allow the engine to cool to the ambient temperature.
15. Note the ambient temperature.
16. Turn the ignition switch to ON (II).
17. Quickly note the value of the 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-510432-S23376976682012102300000) ), 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 TEST»(ref-510444-S09246197812012102300000) ), then go to step 19. If there is damage to the throttle bore, replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-510444-S04768306062012102300000) ), then go to step 19.
19. Turn the ignition switch to ON (II).
20. Reset the PCM with the HDS.
21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
22. Let the engine cool until the value of ECT SENSOR 1 is 131 °F (55 °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 PCM, 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 HDS 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-510432-S17608727802012102300000) . NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the throttle body, the MAF sensor/IAT sensor, and the PCM, then go to step 1 . If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS 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-510432-S17608727802012102300000) . NO -Go to step 3.
3. Check for poor connections or a blockage in 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-510444-S34860790982012102300000) ), 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 REMOVAL/INSTALLATION»(ref-510444-S34860790982012102300000) ), then go to step 21 . NO -Go to step 6.
6. Let the engine cool until the value of ECT SENSOR 1 is 131 °F (55 °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 HDS indicate FAILED? YES -Go to step 10. NO -If the HDS 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 PCM. If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 6 .
10. Inspect the ignition timing (see «IGNITION TIMING INSPECTION»(ref-510447-S30422279452012102300000) ). Is the ignition timing OK? YES -Go to step 12 . NO -Go to step 11.
11. Check for damage to the CKP sensor (see «CMP SENSOR REPLACEMENT»(ref-510432-S24812729592012102300000) ) and the CKP pulse plate (see «CKP PULSE PLATE REPLACEMENT»(ref-510471-S34554901812012102300000) ). Is the CKP sensor and/or the CKP pulse plate damaged? YES -Replace the CKP sensor (see «CMP SENSOR REPLACEMENT»(ref-510432-S24812729592012102300000) ) and/or the CKP pulse plate (see «CKP PULSE PLATE REPLACEMENT»(ref-510471-S34554901812012102300000) ), then go to step 21 . NO -Go to step 28 .
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-510444-S04768306062012102300000) ), then go to step 21 .
13. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan comes on, then let it idle.
14. 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 9.8-11.9 gm/s? YES -Go to step 15. NO -Replace the MAF sensor/IAT sensor (see «MAF SENSOR/IAT SENSOR REPLACEMENT»(ref-510432-S23376976682012102300000) ), then go to step 21 .
15. Turn the ignition switch to LOCK (0).
16. Allow the sensors to cool to the 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 of 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 PCM with the HDS.
23. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
24. Let the engine cool until the value of ECT SENSOR 1 is 131 °F (55 °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/IAT sensor, ECT sensor 1, ECT sensor 2, and the PCM, then go to step 1 . NO -Go to step 27.
27. Monitor the OBD STATUS for DTC P050B in the DTCs MENU with the HDS. Does the HDS 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-510432-S17608727802012102300000) . NO -If the HDS 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 PCM, then go to step 1 . If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 24 .
28. Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ).
29. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
30. Let the engine cool until the value of ECT SENSOR 1 is 131 °F (55 °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 sensor/IAT sensor, ECT sensor 1, ECT sensor 2, and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), then go to step 30 . If the PCM was substituted, go to step 1 . NO -Go to step 33.
33. Monitor the OBD STATUS for DTC P050B in the DTCs MENU with the HDS. Does the HDS indicate PASSED? YES -If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). If any other Pending or Confirmed DTCs were indicated in step 32 , go to the indicated «DTC'S TROUBLESHOOTING»(ref-510432-S17608727802012102300000) . NO -If the HDS 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), then go to step 30 . If the PCM was substituted, go to step 1 . If the HDS indicates EXECUTING, keep idling until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 30 .

DTC P060A: PCM 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 «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ).
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 PCM»(ref-510452-S32404884522012102300000) ), 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 «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-510432-S17608727802012102300000) .

DTC P062F: PCM Internal Control Module Keep Alive Memory (KAM) Error

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. Are any Pending or Confirmed DTCs 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 «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ).
5. Check for Pending or Confirmed DTCs with the HDS. Is DTC P062F indicated? YES -If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), 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 «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-510432-S17608727802012102300000) .

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 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 P or N) 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 main under-hood fuse box, and check the battery performance (see «BATTERY TEST»(ref-510451-S38180891132012102300000) ).
7. Check for poor connections or loose terminals at the alternator and the main under-hood fuse box Are the connections and terminals OK? YES -Go to step 8. NO -Repair the connections or terminals, then go to step 9 .
8. Check for an open in the wire between the alternator and the main under-hood fuse box at the starter subharness. Is the harness OK? YES -Replace the alternator (see «TENSIONER PULLEY REPLACEMENT»(ref-510446-S29243529262012102300000) ), then go to step 9. NO -Repair an open in the wire between the alternator and the main under-hood fuse box, then go to step 9.
9. Turn the ignition switch to ON (II).
10. Reset the PCM with the HDS.
11. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
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 P or N) 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 main under-hood fuse 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-510432-S17608727802012102300000) .

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 74

Scheme 75

Scheme 76

1. Check for poor connections or loose terminals at the alternator 4P connector. Are the connections and terminals OK? YES -Go to step 2. NO -Repair the connections or terminals, then go to step 18 .
2. Turn the ignition switch to 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 2, 000 rpm (in P or N) for 1 minute.
7. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16BC indicated? YES -Go to step 8. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator.
8. Turn the ignition switch to LOCK (0).
9. Disconnect the alternator 4P connector.
10. Turn the ignition switch to ON (II).
11. Measure the voltage between alternator 4P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 12. NO -Repair an open in the wire between the alternator (IG1 line) and the No. 18 ACG (10 A) fuse in the under-dash fuse/relay box, then go to step 17 .
12. Measure the voltage between alternator 4P connector terminal No. 4 and body ground. Is there about 5 V? YES -Replace the alternator (see «TENSIONER PULLEY REPLACEMENT»(ref-510446-S29243529262012102300000) ), then go to step 17 . NO -Go to step 13.
13. Turn the ignition switch to LOCK (0).
14. Jump the SCS line with the HDS.
15. Disconnect PCM connector C (44P).
16. Check for continuity between alternator 4P connector terminal No. 4 and PCM connector terminal C44. Is there continuity? YES -Go to step 26 . NO -Repair an open in the wire between the PCM (C44) and the alternator, then go to step 18 .
17. Turn the ignition switch to LOCK (0).
18. Reconnect all connectors.
19. Turn the ignition switch to ON (II).
20. Reset the PCM with the HDS.
21. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
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 2, 000 rpm (in P or N) for 1 minute.
25. 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 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-510432-S17608727802012102300000) .
26. Reconnect all connectors.
27. Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ).
28. Start the engine.
29. 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
30. Hold the engine speed 2, 000 rpm (in P or N) for 1 minute.
31. 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 PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), then go to step 28 . 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 «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-510432-S17608727802012102300000) .

DTC P16BD: Starter Cut Relay 2 Malfunction

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

Scheme 77

Scheme 78

Scheme 79

Scheme 80

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS, and wait 5 seconds.
3. Check the STARTER CUT RELAY in the DATA LIST with the HDS. Is 2.2 V or less indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the PCM.
4. Try to start the engine. Does the engine start? YES -Go to step 5. NO -Go to step 11 .
5. Turn the ignition switch to LOCK (0).
6. Check the No. 1 STRLD (7.5 A) fuse in auxiliary under-dash fuse holder 1. Is the fuse OK? YES -Replace starter cut relay 2, then go to step 20 . NO -Go to step 7.
7. Remove the blown fuse from auxiliary under-dash fuse holder 1.
8. Jump the SCS line with the HDS.
9. Disconnect PCM connector A (49P).
10. Check for continuity between PCM connector terminal A28 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (A28) and auxiliary under-dash fuse holder 1, Also replace the No. 1 STRLD (7.5 A) fuse, then go to step 19 . NO -Replace the No. 1 STRLD (7.5 A) fuse, then go to step 19 .
11. Remove starter cut relay 1 (A) from the auxiliary under-dash relay block A.
12. Check the STARTER CUT RELAY in the DATA LIST with the HDS. Is 2.2 V or less Indicated? YES -Go to step 13. NO -Replace starter cut relay 1, then go to step 20 .
13. Remove starter cut relay 2 (A) from the auxiliary under-dash relay block A.
14. Check the STARTER CUT RELAY in the DATA LIST with the HDS. Is 2.2 V or less indicated? YES -Go to step 15. NO -Replace starter cut relay 2, then go to step 20 .
15. Turn the ignition switch to LOCK (0).
16. Jump the SCS line with the HDS.
17. Disconnect PCM connector A (49P).
18. Check for continuity between starter cut relay 1 4P connector terminal No. 2 and body ground. Is there continuity? YES -Repair a short in the wire between starter cut relay 1 and auxiliary under-dash fuse holder 1, then go to step 19. NO -Go to step 24 .
19. Reconnect all connectors.
20. Turn the ignition switch to ON (II).
21. Reset the PCM with the HDS.
22. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
23. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16BD indicated? YES -Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the 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-510432-S17608727802012102300000) .
24. Reconnect all connectors.
25. Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ).
26. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16BD indicated? YES -Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), 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 «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-510432-S17608727802012102300000) .

DTC P16BE: Starter Cut Relay 1 Malfunction

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

Scheme 81

Scheme 82

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS, and wait 5 seconds.
3. Check the STARTER CUT RELAY in the DATA LIST with the HDS. Is 3.2 V or more indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the PCM.
4. Remove starter cut relay 1 (A) from the auxiliary under-dash relay block A.
5. Check the STARTER CUT RELAY in the DATA LIST with the HDS. Is 3.2 V or more indicated? YES -Go to step 6. NO -Replace starter cut relay 1, then go to step 7 .
6. Measure the voltage between starter cut relay 1 4P connector terminal No. 2 and body ground. Is there 3.2V or more? YES -Repair a short to power in the wire between starter cut relay 1, starter cut relay 2, and the PCM, then go to step 7. NO -Go to step 11 .
7. Turn the ignition switch to ON (II).
8. Reset the PCM with the HDS.
9. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
10. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16BE indicated? YES -Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the 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-510432-S17608727802012102300000) .
11. Turn the ignition switch to LOCK (0).
12. Reconnect all connectors.
13. Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ).
14. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16BE indicated? YES -Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), 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 «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-510432-S17608727802012102300000) .

DTC P16BF: Starter Cut Relay STRLY Circuit Malfunction

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

Scheme 83

Scheme 84

Scheme 85

Scheme 86

1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS, and wait 5 seconds.
3. Check the STARTER RELAY CONTROL RETURN in the DATA LIST with the HDS. Is OFF Indicated? YES -Go to step 4. NO -Go to step 14 .
4. Turn the ignition switch to START (III), and hold it for 5 seconds or more.
5. Check the STARTER RELAY CONTROL RETURN in the DATA LIST with the HDS while the ignition switch is in START (III). Is OFF indicated? YES -Go to step 6. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the PCM.
6. Turn the ignition switch to LOCK (0).
7. Remove the IG2 cut relay, and the ACC cut relay from their soket (see «DASHBOARD»(ref-510480-S22554474912012102300000) ).
8. Test the IG2 cut relay, and the ACC cut relay (see «POWER RELAY TEST»(ref-510453-S09972764482012102300000) ). Are the relays OK? YES -Go to step 9. NO -Replace the IG2 cut relay, and/or ACC cut relay, then go to step 24 .
9. Remove starter cut relay 1 (A) and starter cut relay 2 (B) from the auxiliary under-dash relay block A.
10. Test starter cut relay 1 and starter cut relay 2 (see «POWER RELAY TEST»(ref-510453-S09972764482012102300000) ). Are the relays OK? YES -Go to step 11. NO -Replace starter cut relay 1 and/or starter cut relay 2, then go to step 24 .
11. Jump the SCS line with the HDS.
12. Disconnect PCM connector A (49P).
13. Check for continuity between PCM connector terminal A3 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (A3) and starter cut relay 1, starter cut relay 2, or the IG2 cut relay, then go to step 24 . NO -Go to step 30 .
14. Turn the ignition switch to LOCK (0).
15. Remove the IG2 cut relay, and the ACC cut relay from their soket (see «DASHBOARD»(ref-510480-S22554474912012102300000) ).
16. Test the IG2 cut relay, and the ACC cut relay (see «POWER RELAY TEST»(ref-510453-S09972764482012102300000) ). Are the relays OK? YES -Go to step 17. NO -Replace the IG2 cut relay, and/or ACC cut relay, then go to step 30 .
17. Remove starter cut relay 1 (A) and starter cut relay 2 (B) from the under-dash relay block A.
18. Test starter cut relay land starter cut relay 2 (see «POWER RELAY TEST»(ref-510453-S09972764482012102300000) ). Are the relays OK? YES -Go to step 19. NO -Replace starter cut relay 1 and/or starter cut relay 2, then go to step 24 .
19. Jump the SCS line with the HDS.
20. Disconnect PCM connector A (49P).
21. Turn the ignition switch to ON (II).
22. Measure the voltage between PCM connector terminal A3 and body ground. Is there 1.0 V or more? YES -Repair a short to power in the wire between the PCM (A3) and starter cut relay 1 or starter cut relay 2, then go to step 23. NO -Go to step 29 .
23. Turn the ignition switch to LOCK (0).
24. Reconnect all connectors.
25. Turn the ignition switch to ON (II).
26. Reset the PCM with the HDS.
27. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
28. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16BF indicated? YES -Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the 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-510432-S17608727802012102300000) .
29. Turn the ignition switch to LOCK (0).
30. Reconnect all connectors.
31. Update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ).
32. Check for Pending or Confirmed DTCs with the HDS. Is DTC P16BF indicated? YES -Check for poor connections or loose terminals at starter cut relay 1, starter cut relay 2, and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), 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 «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). If any other Pending or Confirmed DTCs are indicated, go to the indicated «DTC'S TROUBLESHOOTING»(ref-510432-S17608727802012102300000) .

DTC P2A00: Rear A/F Sensor (Bank 1, Sensor 1) Circuit Range/Performance Problem; DTC P2A03: Front A/F Sensor (Bank 2, 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 ). Information marked with an asterisk (*) applies to the front bank (Bank 2).

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 P or N) 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 D 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 the throttle fully closed) for 6 seconds.
5. Monitor the OBD STATUS for DTC P2A00 and/or P2A03* in the DTCs MENU with the HDS. Does the HDS indicate FAILED? YES -Go to step 6. NO -If the HDS 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 PCM. If it is EXECUTING, keep driving until a result comes on. If the HDS 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-510432-S28711332582012102300000) ).
8. Turn the ignition switch to ON (II).
9. Reset the PCM with the HDS.
10. Do the PCM idle learn procedure (see «PCM IDLE LEARN PROCEDURE»(ref-510456-S37172493852012102300000) ).
11. Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158°F (70°C) Transmission in D 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 the throttle fully closed) for 6 seconds.
12. Check for Pending or Confirmed DTCs with the HDS. Is DTC P2A00 and/or P2A03* indicated? YES -Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM, then go to step 1 . NO -Go to step 13.
13. Monitor the OBD STATUS for DTC P2A00 and/or P2A03* in the DTCs MENU with the HDS. Does the HDS 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-510432-S17608727802012102300000) . NO -If the HDS indicates FAILED, check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the PCM, then go to step 1 . If the HDS indicates EXECUTING, keep driving until a result comes on. If the HDS indicates OUT OF CONDITION, go to step 11 .

DLC Circuit Troubleshooting

Note. If you suspect the HDS or the HDS DLC cable may be the source of the communication problem, verify that they are working properly by connecting them to a known-good, like vehicle and system, and checking for communication problems.

Scheme 87

Scheme 88

Scheme 89

Scheme 90

Scheme 91

Scheme 92

Scheme 93

Scheme 94

Scheme 95

Scheme 96

Scheme 97

Scheme 98

Scheme 99

Scheme 100

Scheme 101

Scheme 102

Scheme 103

Scheme 104

Scheme 105

Scheme 106

Scheme 107

Scheme 108

Scheme 109

1. Turn the ignition switch to LOCK (0).
2. Connect the HDS to the DLC (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-510452-S01760691892012102300000) ).
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 27 .
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-510432-S17608727802012102300000) . NO - If the HDS does not communicate with the SRS, go to step 5. If the HDS does not communicate with the VSA system, go to step 7 . If the HDS does not communicate with the IMMOBI (immobilizer) system, go to step 9 . If the HDS does not communicate with the SH-AWD system, go to step 11 . If the HDS does not communicate with the TPMS, go to step 13 . If the HDS does not communicate with the active damper system, go to step 15 . If the HDS does not communicate with the ACC system, go to step 17 . If the HDS does not communicate with the BODY ELECTRICAL system, go to step 19 .
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 -Go to step 21 . NO -Go to the SRS symptom troubleshooting for an SRS indicator that stays on with no stored DTCs (see «SRS INDICATOR STAYS ON, BUT NO DTCS ARE STORED, OR CANNOT BE READ»(ref-510461-S27142053132012102300000) ).
7. Turn the ignition switch to LOCK (0).
8. Turn the ignition switch to ON (II), and watch the VSA indicator. Does the VSA indicator come on and go off? YES -Go to step 21 . NO -Go to the VSA symptom troubleshooting for an ABS indicator, brake system indicator, and VSA indicator that do not go off (see «ABS INDICATOR, BRAKE SYSTEM INDICATOR, VSA INDICATOR, AND TRAILER STABILITY ASSIST WARNING DO NOT GO OFF»(ref-510481-S17146746772012102300000) ).
9. Turn the ignition switch to LOCK (0).
10. 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-510455-S35037344212012102300000) ). NO -Go to step 21 .
11. Turn the ignition switch to LOCK (0).
12. Turn the ignition switch to ON (II), and watch the SH-AWD indicator. Does the SH-AWD indicator come on and go off? YES -Go to step 21 . NO -Go to the SH-AWD symptom troubleshooting for an SH-AWD indicator that does not go off with no stored DTCs (see «DTC 91-1: SH-AWD CONTROL UNIT PROGRAMMING ERROR»(ref-510440-S25807606372012102300000) ).
13. Turn the ignition switch to LOCK (0).
14. Turn the ignition switch to ON (II), and watch the TPMS indicator. Does the TPMS indicator come on and go off? YES -Go to step 21 . NO -Go to the TPMS symptom troubleshooting for a TPMS indicator that does not go off with no stored DTCs (see «TPMS INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED»(ref-510482-S32324915712012102300000) ).
15. Turn the ignition switch to LOCK(0).
16. Turn the ignition switch to ON (II), and watch the active damper system indicator. Does the active damper system indicator come on and go off? YES -Go to step 21 . NO -Go to the active damper system symptom troubleshooting for an active damper system indicator that does not go off with no stored DTCs (see «SYMPTOM TROUBLESHOOTING»(ref-510483-S12780687682012102300000) ).
17. Turn the ignition switch to LOCK (0).
18. Turn the ignition switch to ON (II), and watch the ACC indicator. Does the ACC Indicator come on and go off? YES -Go to step 19. NO -Go to the ACC symptom troubleshooting for an ACC indicator that does not go off (see «ADAPTIVE CRUISE CONTROL (ACC) INDICATOR (AMBER) DOES NOT GO OFF»(ref-510468-S19407092922012102300000) ).
19. Do the gauge control module self-diagnostic function (see «SELF-DIAGNOSTIC FUNCTION»(ref-510457-S38058549942012102300000) ).
20. Check the gauge display. Is B-CAN....ERROR indicated? YES -Check for B-CAN system DTCs (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE 1 AND TEST MODE 2 (WITHOUT THE HDS)»(ref-510485-S12032953112012102300000) ). NO -Go to step 21.
21. Turn the ignition switch to LOCK (0), then do the battery terminal disconnection procedure (see «USING THE GR8 BATTERY DIAGNOSTIC STATION»(ref-510451-S08643886292012102300000) ), and wait at least 3 minutes before continuing.
22. Disconnect the HDS from the DLC.
23. Check for continuity between DLC terminal No. 7 and body ground. Is there continuity? YES -Go to step 24. NO -Go to step 25 .
24. 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 (39P) VSA modulator-control unit 46P connector Immobilizer-keyless control unit 7P connector Audio unit connector A (17P) (without navigation) SH-AWD control unit connector A (20P) Active damper control unit connector B (14P) (with active damper) TPMS control unit 20P connector Audio-navigation unit connector A (24P) (with navigation) ACC unit 20P connector (with ACC) MICU connector P (30P) 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 a short in the wire between the DLC (K-line) and the SRS unit, the VSA modulator-control unit, the immobilizer-keyless control unit, the audio unit, the SH-AWD control unit, the active damper control unit, the TPMS control unit, the ACC unit, the audio-navigation unit, or the MICU.
25. Connect DLC terminal No. 7 to body ground with a jumper wire.
26. Check for continuity between body ground and these connector terminals: Connector Terminal SRS unit connector A (39P) No. 18 (ORN) VSA modulator-control unit 46P connector No. 15 (ORN) Immobilizer-keyless control unit 7P connector No. 5 (ORN) Audio unit connector A (17P) No. 6 (ORN) SH-AWD control unit connector A (20P) No. 5 (ORN) Active damper control unit connector B (14P) No. 3 (ORN) TPMS control unit 20P connector No. 7 (ORN) MICU connector P (30P) No. 6 (ORN) ACC unit 20P connector No. 8 (ORN) Audio-navigation unit connector A (24P) No. 3 (ORN) Is there continuity between the DLC terminal and each of the terminals in the chart? YES -Replace the part that does not communicate with the HDS. NO -Repair an open in the wire between the DLC (K-line) and the appropriate connector.
27. Check for B-CAN system DTCs without the HDS (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-510485-S02928999072012102300000) ). Is DTC B1168, B1169, and/or B1178 indicated? YES -Go to step 38 . NO -Go to step 28.
28. Turn the ignition switch to LOCK (0).
29. Disconnect the HDS from the DLC.
30. Measure the voltage between DLC terminal No. 16 and body ground. Is there battery voltage? YES -Go to step 31. NO -Repair an open in the wire between DLC terminal No. 16 and the No. 7 BACK UP (10 A) fuse in the under-dash fuse/relay box.
31. Measure the voltage between DLC terminals No. 4 and No. 16. Is there battery voltage? YES -Go to step 32. NO -Repair an open in the wire between DLC terminal No. 4 and G503.
32. Connect the HDS to the DLC (see «GENERAL TROUBLESHOOTING INFORMATION»(ref-510452-S01760691892012102300000) ).
33. Jump the SCS line with the HDS.
34. Disconnect PCM connector A (49P).
35. Disconnect the HDS from the DLC.
36. Check for continuity between PCM connector terminal A48 and DLC terminal No. 6. Is there continuity? YES -Go to step 37. NO -Repair an open in the wire between the PCM (A48) and DLC terminal No. 6.
37. Check for continuity between PCM connector terminal A49 and DLC terminal No. 14. Is there continuity? YES -Reconnect all connectors, then update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). NO -Repair an open in the wire between the PCM (A49) and DLC terminal No. 14.
38. Try to start the engine. Does the engine start and idle smoothly? YES -Go to «F-CAN CIRCUIT TROUBLESHOOTING»(ref-510432-S32494596212012102300000) NO -Go to step 39.
39. Turn the ignition switch to LOCK (0).
40. Check the No. 3 IG1 MAIN (50 A) fuse in the main under-hood fuse box. Is the fuse OK? YES -Repair an open in the wire between the No. 3 IG1 MAIN (50 A) fuse and the ignition switch. If the wire is OK, go to step 41. NO -Repair a short in the wire between the No. 3 IG1 MAIN (50 A) fuse and the main under-hood fuse box. Also replace the No. 3 IG1 MAIN (50 A) fuse.
41. Inspect the No. 8 IGP (15 A) fuse in the under-hood fuse/relay box. Is the fuse OK? YES -Go to step 48 . NO -Go to step 42.
42. Remove the blown No. 8 IGP (15 A) fuse from the under-hood fuse/relay box.
43. Jump the SCS line with the HDS.
44. Disconnect PCM connector B (49P).
45. While disconnecting each of the parts or connectors below, one at a time, check for continuity between PCM connector terminal B3 and body ground. PGM-FI main relay 2 Each injector 2P connector Camshaft position (CMP) sensor 3P connector Crankshaft position (CKP) sensor 3P connector MAF sensor/IAT sensor 5P connector Under-hood fuse/relay box connector H (9P) 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 PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). Also replace the No. 8 IGP (15 A) fuse. NO -Go to step 46.
46. Disconnect these parts or connectors: PGM-FI main relay 2 Each injector 2P connector Camshaft position (CMP) sensor 3P connector Crankshaft position (CKP) sensor 3P connector MAF sensor/IAT sensor 5P connector Under-hood fuse/relay box connector H (9P)
47. Check for continuity between PCM connector terminal B3 and body ground. Is there continuity? YES -Repair a short in the wire between the PCM (B3) and each part. Also replace the No. 8 IGP (15 A) fuse. NO -Replace the under-hood fuse/relay box. Also replace the No. 8 IGP (15A) fuse.
48. Inspect the No. 19 FUEL PUMP (20 A) fuse in the under-dash fuse/relay box. Is the fuse OK? YES -Go to step 60 . NO -Go to step 49.
49. Remove the blown No. 19 FUEL PUMP (20 A) fuse from the under-dash fuse/relay box.
50. Remove the left kick panel (see «TRIM REMOVAL/INSTALLATION - DOOR AREAS»(ref-510486-S36301704662012102300000) ), then remove PGM-FI main relay 2 (G) from the under-dash fuse/relay box.
51. Test PGM-FI main relay 2 (see «POWER RELAY TEST»(ref-510453-S09972764482012102300000) ). Is the relay OK? YES -Go to step 52. NO -Replace PGM-FI main relay 2. Also replace the No. 19 FUEL PUMP (20 A) fuse.
52. Check for continuity between PGM-FI main relay 2 4P connector terminal No. 1 and body ground. Is there continuity? YES -Go to step 53. NO -Go to step 56 .
53. Jump the SCS line with the HDS.
54. Disconnect PCM connector B (49P).
55. Check for continuity between PCM connector terminal B42 and body ground. Is there continuity? YES -Repair a short in the wire between the No. 19 FUEL PUMP (20 A) fuse and the PCM (B42), between the No. 19 FUEL PUMP (20 A) fuse and PGM-FI main relay 2, or between the No. 19 FUEL PUMP (20 A) fuse and the immobilizer control unit. Also replace the No. 19 FUEL PUMP (20 A) fuse. NO -Replace the No. 19 FUEL PUMP (20 A) fuse in the under-dash fuse/relay box, reconnect all connectors, and update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ).
56. Remove the cargo floor lid (see «TRIM REMOVAL/INSTALLATION - CARGO AREA»(ref-510486-S16413611312012102300000) ).
57. On models with active damper, remove the active damper control unit (see «ACTIVE DAMPER CONTROL UNIT REPLACEMENT»(ref-510483-S16648420312012102300000) ).
58. Disconnect the fuel pump control module 10P connector.
59. Check for continuity between fuel pump control module 10P connector terminal No. 3 and body ground. Is there continuity? YES -Repair a short in the wire between the fuel pump control module and PGM-FI main relay 2. Also replace the No. 19 FUEL PUMP (20 A) fuse in the under-dash fuse/relay box. NO -Replace the No. 19 FUEL PUMP (20 A) fuse, then substitute a known-good fuel pump control module (see «FUEL PUMP CONTROL MODULE REPLACEMENT»(ref-510443-S14912648762012102300000) ), and recheck. If the symptom/indication goes away with a known-good fuel pump control module, replace the original fuel pump control module (see «FUEL PUMP CONTROL MODULE REPLACEMENT»(ref-510443-S14912648762012102300000) ).
60. Jump the SCS line with the HDS.
61. Disconnect PCM connectors A (49P) and B (49P).
62. Turn the ignition switch to ON (II).
63. Measure the voltage between PCM connector terminal B42 and body ground. Is there battery voltage? YES -Go to step 64. NO -Repair an open in the wire between the No. 19 FUEL PUMP (20 A) fuse and the PCM (B42).
64. Measure the voltage between PCM connector terminal A6 and body ground. Is there battery voltage? YES -Go to step 68 . NO -Go to step 65.
65. Turn the ignition switch to LOCK (0).
66. Disconnect under-hood fuse/relay box connector E (14P).
67. Check for continuity between PCM connector terminal A6 and under-hood fuse/relay box connector E (14P) terminal No. 5. Is there continuity? YES -Test PGM-FI main relay 1 (built into the relay control module) (see «RELAY CONTROL MODULE TEST»(ref-510453-S16051906792012102300000) ). If PGM-FI main relay 1 is OK, reconnect all connectors, then update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ). NO -Repair an open in the wire between the PCM (A6) and the under-hood fuse/relay box.
68. Turn the ignition switch to LOCK (0).
69. Disconnect under-hood fuse/relay box connector H (9P).
70. Check for continuity between PCM connector terminal B3 and under-hood fuse/relay box connector H (9P) terminal No. 1. Is there continuity? YES -Go to step 71. NO -Repair an open in the wire between the PCM (B3) and the under-hood fuse/relay box.
71. Test PGM-FI main relay 1 (built into the relay control module) (see «RELAY CONTROL MODULE TEST»(ref-510453-S16051906792012102300000) ). Is PGM-FI main relay 1 OK? YES -Go to step 72. NO -Replace the under-hood fuse/relay box (see «DTC B1065: RELAY CONTROL MODULE LOST COMMUNICATION WITH DRIVER'S MPCS UNIT (DRLOCKSW MESSAGE)»(ref-510478-S29153403222012102300000) ).
72. Disconnect PCM connector C (49P).
73. Check for continuity between body ground and PCM connector terminals B1, B40, B41, C1, and C41 individually. Is there continuity? YES -Go to step 74. NO -Repair an open in the wire between the PCM (B1, B40, B41, C1, C41) and body ground (G101).
74. Check for continuity between PCM connector terminal B36 and body ground. Is there continuity? YES -Go to step 75. NO -Go to step 76 .
75. Continue to check for continuity between PCM connector terminal B36 and body ground, while disconnecting these parts, one at a time: MAP sensor 3P connector 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 a short in the wire between the PCM (B36) and the MAP sensor or the output shaft (countershaft) speed sensor.
76. Check for continuity between PCM connector terminal C12 and body ground. Is there continuity? YES -Go to step 77. NO -Go to step 78 .
77. Continue to check for continuity between PCM connector terminal C12 and body ground, while disconnecting the input shaft (mainshaft) speed sensor 3P connector. Is there continuity? YES -Repair a short in the wire between the PCM (C12) and the input shaft (mainshaft) speed sensor. NO -Replace the input shaft (mainshaft) speed sensor (see «INPUT SHAFT (MAINSHAFT) SPEED SENSOR REPLACEMENT»(ref-510439-S11313397302012102300000) ).
78. Check for continuity between PCM connector terminal A24 and body ground. Is there continuity? YES -Go to step 79. NO -Go to step 80 .
79. Continue to check for continuity between PCM connector terminal A24 and body ground, while disconnecting the APP sensor 6P connector. Is there continuity? YES -Repair a short in the wire between the PCM (A24) and the APP sensor. NO -Replace the accelerator pedal module (see «ACCELERATOR PEDAL MODULE REMOVAL/INSTALLATION»(ref-510474-S22695198362012102300000) ).
80. Check for continuity between 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 PCM connector terminal A25 and body ground, while disconnecting these connectors one at a time. APP sensor 6P connector FTP 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 a short in the wire between the PCM (A25) and the APP sensor or the FTP sensor.
82. Check for continuity between PCM connector terminal B18 and body ground. Is there continuity? YES -Go to step 83. NO -Go to step 84 .
83. Continue to check for continuity between PCM connector terminal B18 and body ground, while disconnecting the throttle body 6P connector. Is there continuity? YES -Repair a short in the wire between the PCM (B18) and the throttle body. NO -Replace the throttle body (see «THROTTLE BODY REMOVAL/INSTALLATION»(ref-510444-S04768306062012102300000) ).
84. Check for continuity between PCM connector terminal C11 and body ground. Is there continuity? YES -Go to step 85. NO -Reconnect all connectors, then update the PCM if it does not have the latest software (see «PCM UPDATE»(ref-510432-S36085130492012102300000) ), or substitute a known-good PCM (see «SUBSTITUTING THE PCM»(ref-510452-S32404884522012102300000) ), then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM (see «PCM REPLACEMENT»(ref-510432-S18664843072012102300000) ).
85. Continue to check for continuity between PCM connector terminal C11 and body ground, while disconnecting these parts, one at a time: IMT actuator 5P connector EGR valve 5P 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 a short in the wire between the PCM (C11) and the IMT actuator or the EGR valve.

Scheme 110

Scheme 111

1. Relieve the fuel pressure (see «FUEL PRESSURE RELIEVING»(ref-510443-S16738906092012102300000) ).
2. Remove the intake manifold (see «INTAKE MANIFOLD REMOVAL AND INSTALLATION»(ref-510442-S37580851672012102300000) ).
3. Disconnect the quick-connect fitting (A) (see «FUEL LINE/QUICK-CONNECT FITTING REMOVAL»(ref-510443-S26834960012012102300000) ).
4. Remove the fuel joint hose mounting bolt (B).
5. Disconnect the connectors (C) from the injectors.
6. Remove the fuel rail mounting bolts (D) from the fuel rails (E).
7. Remove the fuel rail and the injectors from the injector base.
8. Remove the injector clips (F) from the fuel rail.
9. Remove the injectors from the fuel rails.
10. Coat the new O-rings (black) (A) with clean engine oil, and insert the injectors (B) into the fuel rails (C).
11. Install the injector clips (D).
12. Coat the new injector O-rings (brown) (E) with clean engine oil.
13. Install the fuel rails and injectors in the injector base (F).
14. Install the fuel rail mounting bolts, and connect the connectors on the injectors.
15. Install the fuel joint hose mounting bolt.
16. Connect the quick-connect fitting (see «FUEL LINE/QUICK-CONNECT FITTING INSTALLATION»(ref-510443-S00310941402012102300000) ).
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 will be pressurized. Repeat this two or three times, then check for fuel leaks.
18. Install the intake manifold with a new gasket (see «INTAKE MANIFOLD REMOVAL AND INSTALLATION»(ref-510442-S37580851672012102300000) ).

Scheme 112

1. Remove the engine cover (see step 6 under «ENGINE REMOVAL»(ref-510463-S16822501512012102300000) ).
2. Disconnect the MAP sensor 3P connector (A).
3. Remove the screw (B).
4. Remove the MAP sensor (C).
5. Install the parts in the reverse order of removal with a new O-ring (D).

Scheme 113

1. Disconnect the MAF sensor/IAT sensor 5P connector (A).
2. Remove the screws (B).
3. Remove the MAF sensor/IAT sensor (C).
4. Install the parts in the reverse order of removal with a new O-ring (D).

Scheme 114

1. Drain the engine coolant (see «COOLANT CHECK»(ref-510438-S26925506222012102300000) ).
2. Remove the engine cover (see step 6 under «ENGINE REMOVAL»(ref-510463-S16822501512012102300000) ).
3. Remove the main under-hood fuse box.
4. Disconnect the ECT sensor 1 2P connector (A).
5. Remove ECT sensor 1 (B).
6. Install the parts in the reverse order of removal with a new O-ring (C), then refill the radiator with engine coolant (see «COOLANT CHECK»(ref-510438-S26925506222012102300000) ).

Scheme 115

1. Drain the engine coolant (see «COOLANT CHECK»(ref-510438-S26925506222012102300000) ).
2. Remove the splash shield (see «SPLASH SHIELD REPLACEMENT»(ref-510458-S02765418422012102300000) ).
3. Disconnect the ECT sensor 2 2P connector (A).
4. Remove ECT sensor 2 (B).
5. Install the parts in the reverse order of removal with a new O-ring (C), then refill the radiator with engine coolant (see «COOLANT CHECK»(ref-510438-S26925506222012102300000) ).