PGM-FI System

MIL Circuit Troubleshooting (cont'd)

 11-83  

  1. Reconnect ECM/PCM connector E (31P).
  2. Turn the ignition switch ON (II).
  3. Measure voltage between body ground and ECM/PCM connector terminals A2 and A3 individually.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there battery voltage?

YES - Go to step 47.

NO - Go to step 41.

  1. Turn the ignition switch OFF.
  2. Remove the PGM-FI main relay 1 (A).

  1. Turn the ignition switch ON (II).
  1. Measure voltage between the PGM-FI main relay 1 4P connector terminal No. 2 and body ground.

Wire side of female terminals

Is there battery voltage?

YES - Go to step 45.

NO - Repair open in the wire between the No. 6 ECU (ECM/PCM) (15A) fuse and the PGM-FI main relay 1.

  1. Turn the ignition switch OFF.
  2. Check for continuity between the PGM-FI main relay 1 4P connector terminal No. 1 and ECM/PCM connector terminals A2 and A3 individually.

Wire side of female terminals

Is there continuity?

YES - Replace the PGM-FI main relay 1.

NO - Repair open in the wire between the PGM-FI main relay 1 and the ECM/PCM (A2, A3).