Charging System Indicator Circuit Troubleshooting

Charging System Indicator Circuit Troubleshooting

NOTE: If the 12 V battery voltage is to low charge for starter motor turned, the charging system indicator light may come on. If the charging system indicator light stay on or never comes on at all, then do this troubleshooting (if no DTC's are set).

1. Turn the ignition switch ON (II).
2. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - Go to the indicated DTC's troubleshooting.
NO - Go to step 3.
3. Turn the ignition switch OFF.
4. Check the 12 V battery.
Is 12 V battery OK?
YES - Go to step 5.
NO - Charge or replace the 12 V battery.
5. Turn the ignition switch ON (II).
Does the charging system indicator comes on?
YES - Go to step 6.
NO - Do the gauge self-diagnostic function.
6. Start the engine.
Does the charge system indicator go off?
YES - The charging system indicator circuit is OK.
NO - Go to step 7.
7. Do the gauge self-diagnostic function.
Does the charging system indicator flash?
YES - Go to step 8.
NO - Substitute a known-good gauge control module, and recheck. If the charging system indicator circuit is OK, replace the original gauge control module.
8. Wait 2 minutes at idle.
9. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - Go to the indicated DTC's troubleshooting.
NO - Go to step 10.
10. Watch the charging system indicator.
Does the charge system indicator go off?
YES - The DC-DC converter was in temporary shut down mode, due to temperature extremes.
NO - Go to step 11.
11. Check the MPI VOLTAGE in the DATA LIST with the HDS.
Is about 90 - 192 V indicated?
YES - Check for installation of the DC-DC converter.
NO - Replace the DC-DC converter.