Charging System Indicator Circuit Troubleshooting
Charging System Indicator Circuit Troubleshooting
NOTE: Check for stored DTCs in the PGM-FI before troubleshooting the charging system indicator.
1. Remove the engine compartment covers Service and Repair.
2. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
Does the charging system indicator come on?
YES -
Go to step 3.
NO -
Go to step 15.
3. 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 4.
4. Do the gauge control module self-diagnostic function procedure Testing and Inspection.
Does the charging system indicator flash?
YES -
Go to step 5.
NO -
Replace the gauge control module Service and Repair.
5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
6. Disconnect the alternator 4P connector.
7. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
Does the charging system indicator go off?
YES -
Replace the alternator Removal and Replacement or repair the alternator Overhaul.
NO -
Go to step 8.
8. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
9. Connect the HDS to the DLC.
10. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
11. Make sure the HDS communicates with the vehicle and the ECM/PCM. If it does not communicate, troubleshoot the DLC circuit Testing and Inspection.
12. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
NOTE: This step must be done to protect the ECM/PCM from damage.
13. Disconnect ECM/PCM connector C (49P).
14. Check for continuity between ECM/PCM connector terminal C42 and body ground.
Is there continuity?
YES -
Repair a short to ground in the wire between alternator 4P connector terminal No. 3 and ECM/PCM connector terminal C42.
NO -
Update the ECM/PCM if it does not have the latest software ECM/PCM Update, 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 Service and Repair.
15. Do the gauge control module self-diagnostic function procedure Testing and Inspection.
Does the charging system indicator flash?
YES -
Go to step 16.
NO -
Replace the gauge control module Service and Repair.
16. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
17. Disconnect the alternator 4P connector.
18. Connect alternator 4P connector terminal No. 3 and body ground with a jumper wire.
19. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
Does the charging system indicator come on?
YES -
Replace the alternator Removal and Replacement or repair the alternator Overhaul.
NO -
Disconnect the jumper wire, then go to step 20.
20. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
21. Connect the HDS to the DLC.
22. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
23. Make sure the HDS communicates with the vehicle and the ECM/PCM. If it does not communicate, troubleshoot the DLC circuit Testing and Inspection.
24. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
NOTE: This step must be done to protect the ECM/PCM from damage.
25. Disconnect ECM/PCM connector C (49P).
26. Check for continuity between ECM/PCM connector terminal C42 and alternator 4P connector terminal No. 3.
Is there continuity?
YES -
Update the ECM/PCM if it does not have the latest software ECM/PCM Update, 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 Service and Repair.
NO -
Repair an open in the wire between alternator 4P connector terminal No. 3 and ECM/PCM connector terminal C42.
27. Install the engine compartment covers Service and Repair.