Honda Accord: Charging System Indicator Circuit Troubleshooting

troubleshooting the charging system indicator.

1. Turn the ignition switch to ON (II).

Does the charging system indicator come on? YES-

Go to step 2.

NO-

Go to step 14.

2. Start the engine. Hold the engine speed at 2,000 rpm for 1 minute.

Does the charging system indicator go off? YES-

Charging system indicator circuit is OK. Go to the alternator and regulator circuit troubleshooting (see page 4-27 ) . - NO

-Go to step 3.

3. Do the gauge control module self-diagnostic function procedure (see page 22-332).

Does the charging system indicator flash? YES

-Go to step 4.

b-Replace the gauge control module (see page 22-351 ) . - 4. Turn the ignition switch to LOCK (0).

5. Disconnect the alternator 4P connector.

6. Turn the ignition switch to ON (II).

NOTE:

The charging system indicator may come on and then go off.

Does the charging system indicator go off? YES-

Replace the alternator (see page 4-32), or repair the alternator (see page 4-34).H NO

-Go to step 7.

7. Turn the ignition switch to LOCK (0).

8. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on page 11-3).

9. Turn the ignition switch to ON (II).

10. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain control module (PCM). If it does not communicate, troubleshoot the DLC circuit (see page 11-181).

11. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).

NOTE: This step must be done to protect the ECM/PCM from damage.

12. Disconnect ECM/PCM connector B (49P).

13. Check for continuity between ECM/PCM connector terminal B46 and body ground.

Terminal side of female terminals

Is there continuity? YES-Repair short to ground in the wire between alternator 4P connector terminal No. 3 and ECM/PCM connector terminal B46. il NO-Update the ECM/PCM if it does not have the latest software (see page 11-203), or substitute a known-good ECM/PCM (see page 11-7), then recheck.

If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see page 11-204).

14. Do the gauge control module self-diagnostic function procedure (see page 22-332).

Does the charging system indicator flash? YES-Gotostep 15.

- NO-Replace the gauge control module (see page 22-351 ) . - 15. Turn the ignition switch to LOCK (0).

16. Disconnect the alternator 4P connector.

17. Connect alternator 4P connector terminal No. 3 to body ground with a jumper wire.

ALTERNATOR 4P CONNECTOR

Wire side of female terminals

18. Turn the ignition switch to ON (II).

Does the charging system indicator come on? YES-Replace the alternator (see page 4-32), or repair the alternator (see page 4-34).- NO-Disconnect the jumper wire, then go to step 19.

19. Turn the ignition switch to LOCK (0).

20. Connect the HDS to the DLC (see step 2 on page 11-3).

21. Turn the ignition switch to ON (II).

22. Make sure the HDS communicates with the vehicle and the ECM/PCM. If it does not communicate, troubleshoot the DLC circuit (see page 11-181).

23. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).

NOTE: This step must be done to protect the ECM/PCM from damage.

24. Disconnect ECM/PCM connector B (49P).

25. Check for continuity between ECM/PCM connector terminal B46 and alternator 4P connector terminal No. 3.

ECM/PCM CONNECTOR B (49P)

Is there continuity? YES-

Update the ECM/PCM if it does not have the latest software (see page 11-203), or substitute a known-good ECM/PCM (see page 11-7), then recheck.

If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see page 11-204).B NO-

Repair open in the wire between alternator 4P connector terminal No. 3 and ECM/PCM connector terminal B46