Charging System Indicator Circuit Troubleshooting

Turn the ignition switch ON (II). Does the charging system indicator come on?
YES | - | Go to Step 2 .
NO | - | Go to Step 3 .
Start the engine. Does the charging system indicator go off?
YES | - | Charging system indicator circuit is OK. Go to the Alternator and Regulator Circuit Troubleshooting.■
NO | - | Go to Step 3 .
Do the gauge control module self-diagnosis function procedure. Does the charging system indicator flash?
YES | - | Go to Step 4 .
NO | - | Replace the gauge control module. ■
Turn the ignition switch OFF. Disconnect the alternator 4P connector. Turn the ignition switch ON (II). Measure the voltage between alternator 4P connector terminal No. 1 and body ground. Is there battery voltage?
YES | - | Go to Step 8 .
NO | - | Check for a blown No. 18 (15 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair open in the wire between the alternator and under-dash fuse/relay box.■
Turn the ignition switch OFF, and wait at least 30 seconds. Disconnect engine control module (ECM) connector No. 1 (96P). |

Check for continuity between ECM connector No. 1 terminal No. 35 and alternator 4P connector terminal No. 3. Is there continuity?
YES | - | Go to Step 11 .
NO | - | Repair an open in the wire between the alternator and the ECM.■

Check for continuity between ECM connector No. 1 terminal No. 35 and body ground. Is there continuity?
YES | - | Repair a short in the wire between the alternator and the ECM.■
NO | - | Go to the Alternator and Regulator Circuit Troubleshooting.■