Charging System Indicator Circuit Troubleshooting
  1. Connect alternator 4P connector terminal No. 3 to body ground with a jumper wire.
  1. Turn the ignition switch to ON (II).
Does the charging system indicator come on?
YES -
Replace the alternator, or repair the alternator. ■
NO -
Disconnect the jumper wire, then go to Step 19 .
  1. Connect the HDS to the DLC.
  1. Turn the ignition switch to ON (II).
  1. Make sure the HDS communicates with the vehicle and the ECM. If it doesn't communicate, troubleshoot the DLC circuit.
  1. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0).
    NOTE: This step must be done to protect the ECM from damage.
  1. Disconnect ECM connector B (49P).