Charging System Indicator Circuit Troubleshooting
Charging System Indicator Circuit Troubleshooting'05-07 Models
1. Turn the ignition switch ON (II).
Does the charging system indicator come on?
YES - Go to step 2.
NO - Go to step 12.
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. Alternator and Regulator Circuit Troubleshooting
NO - Go to step 3.
3. Do the gauge control module self-test procedure.
Does the charging system indicator flash?
YES - Go to step 4.
NO - Replace the gauge control module.
4. Turn the ignition switch OFF.
5. Disconnect the alternator 4P connector.
6. Turn the ignition switch ON (II).
Does the charging system indicator go off?
YES - Replace the alternator or repair the alternator.
NO - Go to step 7.
7. Turn the ignition switch OFF.
8. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) .
9. Jump the SCS line with the HDS.
NOTE: This step must be done to protect the engine control module (ECM)/powertrain control module (PCM) from damage.
10. Disconnect ECM/PCM connector B (24P).
11. Check for continuity between ECM/PCM connector terminal B10 and body ground.
Is there continuity?
YES - Repair short in the wire between the alternator and the ECM/PCM.
NO - 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 with a known-good ECM/PCM, replace the original ECM/PCM.
12. Do the gauge control module self-test procedure.
Does the charging system indicator flash?
YES - Go to step 13.
NO - Replace the gauge control module.
13. Turn the ignition switch OFF.
14. Disconnect the alternator 4P connector.
15. Connect alternator 4P connector terminal No. 3 and body ground with a jumper wire.
16. Turn the ignition switch ON (II).
Does the charging system indicator come on?
YES - Replace the alternator or repair the alternator.
NO - Go to step 17.
17. Turn the ignition switch OFF.
18. Connect the HDS to the DLC .
19. Jump the SCS line with the HDS.
NOTE: This step must be done to protect the ECM/PCM from damage.
20. Disconnect ECM/PCM connector B (24P).
21. Check for continuity between ECM/PCM connector terminal B10 and alternator 4P connector terminal No. 3.
Is there continuity?
YES - 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 with a known-good ECM/PCM, replace the original ECM/PCM.
NO - Repair open in the wire between the alternator and the ECM/PCM.