Pgm-Fi System: Diagnosis Acura TL III facelift

DTC P062F: ECM/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 ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated? YES -Go to step 4. NO -Intermittent failure, the system is OK at this time.
4. Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(ref-291525-S06490175862008072900000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-291525-S00620566452008072900000) ).
5. Check for Temporary DTCs or DTCs with the HDS. Is DTC P062F indicated? YES -If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-291525-S00620566452008072900000) ), then recheck. If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-291526-S06435096812008072900000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

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 ON (II).
2. Clear the DTC with the HDS.
3. Start the engine.
4. Check under these conditions: A/C switch on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
5. Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
6. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BB indicated? YES -Go to step 7. NO -Intermittent failure, 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-291522-S15233963242008072900000) ).
7. Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box (+B line). Are the connections and terminals OK? YES -Go to step 8. NO -Repair the connectors or terminals, then go to step 9 .
8. Check for an open in the wire between the alternator and under-hood fuse/relay box at the starter subharness. Is the harness OK? YES -Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-291517-S06801495522008072900000) ), then go to step 9. NO -Repair open in the wire between the alternator and the under-hood fuse/relay box, then go to step 9.
9. Turn the ignition switch ON (II).
10. Reset the ECM/PCM with the HDS.
11. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-291528-S20095377152008072900000) ).
12. Start the engine.
13. Check under these conditions: A/C switch on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
14. Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
15. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BB indicated? YES -Check for poor connections or loose terminals at the alternator and the under-hood fuse/relay box, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

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 86

Scheme 87

Scheme 88

Scheme 89

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 20 .
2. Check the alternator mounting surface for corrosion. Is the mounting surface corroded? YES -Remove the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-291517-S06801495522008072900000) ). Clean all mounting surfaces, and reinstall the alternator, then go to step 20 . NO -Go to step 3.
3. Turn the ignition switch ON (II).
4. Clear the DTC with the HDS.
5. Start the engine.
6. Check under these conditions: A/C switch on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
7. Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
8. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BC indicated? YES -Go to step 9. NO -Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the alternator.
9. Turn the ignition switch OFF.
10. Disconnect the alternator 4P connector.
11. Turn the ignition switch ON (II).
12. Measure voltage between alternator 4P connector terminal No. 1 and body ground. Is there battery voltage? YES -Go to step 13. NO -Repair open in the wire between the alternator (IG1 line) and the No. 18 IG ACG (15 A) fuse in under-dash fuse/relay box, then go to step 19 .
13. Measure voltage between alternator 4P connector terminal No. 4 and body ground. Is there about 5 V? YES -Replace the alternator (see «ALTERNATOR REMOVAL AND INSTALLATION»(ref-291517-S06801495522008072900000) ), then go to step 19 . NO -Go to step 14.
14. Turn the ignition switch OFF.
15. Jump the SCS line with the HDS.
16. Disconnect ECM/PCM connector A (31P).
17. Connect alternator 4P connector terminal No. 4 to body ground with a jumper wire.
18. Check for continuity between ECM/PCM connector terminal A12 and body ground. Is there continuity? YES -Go to step 28 . NO -Repair open in the wire between the ECM/PCM (A12) and the alternator, then go to step 20 .
19. Turn the ignition switch OFF.
20. Reconnect all connectors.
21. Turn the ignition switch ON (II).
22. Reset the ECM/PCM with the HDS.
23. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-291528-S20095377152008072900000) ).
24. Start the engine.
25. Check under these conditions: A/C switch on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
26. Hold the engine speed at 2,000 rpm {in Park or neutral) for 1 minute.
27. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BC indicated? YES -Check for poor connections or loose terminals at the alternator and the ECM/PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
28. Reconnect all connectors.
29. Update the ECM/PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(ref-291525-S06490175862008072900000) ), or substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-291525-S00620566452008072900000) ).
30. Start the engine.
31. Check under these conditions: A/C switch on Temperature control at maximum cool Blower fan at maximum speed Rear window defogger on Headlights on high beam
32. Hold the engine speed at 2,000 rpm (in Park or neutral) for 1 minute.
33. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BC indicated? YES -Check for poor connections or loose terminals at the alternator and the ECM/PCM. If the ECM/PCM was updated, substitute a known-good ECM/PCM (see «SUBSTITUTING THE ECM/PCM»(ref-291525-S00620566452008072900000) ), then go to step 30 . If the ECM/PCM was substituted, go to step 1 . NO -If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM (see «ECM/PCM REPLACEMENT»(ref-291526-S06435096812008072900000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

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 ).

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS and wait 5 seconds.
3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BD 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 2 and the PCM.
4. Replace starter cut relay 2.
5. Reset the PCM with the HDS.
6. Do the PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-291528-S20095377152008072900000) ).
7. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BD indicated? YES -Check for poor connections or loose terminals at starter cut relay 2 and the PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

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 ).

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS and wait 5 seconds.
3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BE 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 and the PCM.
4. Replace starter cut relay 1.
5. Reset the PCM with the HDS.
6. Do the PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-291528-S20095377152008072900000) ).
7. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BE indicated? YES -Check for poor connections or loose terminals at starter cut relay 1 and the PCM, then go to step 1 . NO -Troubleshooting is complete. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

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 90

1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS and wait 5 seconds.
3. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BF 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. Turn the ignition switch OFF.
5. Jump the SCS line with the HDS.
6. Remove starter cut relay 1 and starter cut relay 2.
7. Disconnect PCM connector E (31P).
8. Check for continuity between PCM connector terminal E21 and body ground. Is there continuity? YES -Repair short in the wire between the PCM (E21) and starter cut relay 1 or starter cut relay 2, then go to step 9. NO -Go to step 14 .
9. Reconnect all connectors.
10. Turn the ignition switch ON (II).
11. Reset the PCM with the HDS.
12. Do the PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-291528-S20095377152008072900000) ).
13. Check for Temporary DTCs or 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 Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.
14. Reconnect all connectors.
15. Update the PCM if it does not have the latest software (see «UPDATING THE ECM/PCM»(ref-291525-S06490175862008072900000) ), or substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-291525-S00620566452008072900000) ).
16. Check for Temporary DTCs or DTCs with the HDS. Is DTC P16BF indicated? YES -Check for poor connections or loose terminals at starter relay 1, starter relay 2, and the PCM. If the PCM was updated, substitute a known-good PCM (see «SUBSTITUTING THE ECM/PCM»(ref-291525-S00620566452008072900000) ), 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-291526-S06435096812008072900000) ). If any other Temporary DTCs or DTCs are indicated, go to the indicated DTCs troubleshooting.

DTC P2A00: Rear A/F Sensor (Bank 1, Sensor 1) Circuit 1 Range/Performance Problem; DTC P2A03: Front A/F Sensor (Bank 2, Sensor 1) Circuit 1 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 ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 rpm without load (in Park or neutral) until the radiator fan comes on, then let it idle.
4. Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C) A/T in D position (M/T in 3rd gear) Vehicle speed between 25-55 mph (40 - 88 km/h) for 5 minutes Drive at a steady speed between 55-75 mph (88-120 km/h) for 10 seconds, then decelerate (with throttle fully closed) for at least 6 seconds.
5. Monitor the OBD STATUS for DTC P2A00 and/or P2A03* in the DTCs MENU with the HDS. Does the screen indicate FAILED? YES -Go to step 7 . NO -If the screen indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the A/F sensor (Sensor 1) and the ECM/PCM. If the screen indicates EXECUTING, keep driving until a result comes on. If the screen indicates OUT OF CONDITION, go to step 3 and recheck.
6. Turn the ignition switch OFF.
7. Replace the A/F sensor (Sensor 1) (see «A/F SENSOR REPLACEMENT»(ref-291526-S09515416372008072900000) ).
8. Turn the ignition switch ON (II).
9. Reset the ECM/PCM with the HDS.
10. Do the ECM/PCM idle learn procedure (see «ECM/PCM IDLE LEARN PROCEDURE»(ref-291528-S20095377152008072900000) ).
11. Test-drive under these conditions: Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C) A/T in D position (M/T in 3rd gear) Vehicle speed between 25-55 mph (40-88 km/h) for 5 minutes Drive at a steady speed between 55-75 mph (88-120 km/h) for 10 seconds, then decelerate (with throttle fully closed) for at least 6 seconds.
12. Check for Temporary DTCs or 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 ECM/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 screen indicate PASSED? YES -Troubleshooting is complete. If any other Temporary DTCs or DTCs were indicated in step 12 , go to the indicated DTCs troubleshooting. 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 .