Charging System Indicator Circuit Troubleshooting
  1. Turn the ignition switch ON (II).
Does the charging system indicator come on?
YES -
Go to Step 2 .
NO -
Go to Step 3 .
  1. 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 .
Does the charging system indicator flash?
YES -
Go to Step 4 .
NO -
  1. Turn the ignition switch OFF.
  1. Disconnect the alternator 4P connector.
  1. Turn the ignition switch ON (II).
  1. 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. 3 (10 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.■
  1. Turn the ignition switch ON (II).
  1. Jump the SCS line with the HDS, then turn the ignition switch OFF.
    NOTE: This step must be done to protect the ECM from damage.
  1. Disconnect ECM connector No. 1 (96P).
  1. 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 14 .
NO -
Repair open in the wire between the alternator and the ECM.■
  1. Check for continuity between ECM connector No. 1 terminal No. 35 and body ground.
Is there continuity?
YES -
Repair short in the wire between the alternator and the ECM.■
NO -