PGM-FI System

MIL Circuit Troubleshooting (cont'd)

11-63  

  1. Measure voltage between body ground and ECM/PCM connector terminals A4, A5, A23 and A24 individually.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there less than 1.0 V?

YES - Repair open in the wire (s) between that had more than 1.0 V between G101 and the ECM/PCM (A4, A5, A23, A24).

NO - Go to step 48.

  1. Measure voltage between body ground and ECM/PCM connector terminal A21.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there about 5 V?

YES - Go to step 56.

NO - Go to step 49.

  1. Turn the ignition switch OFF.
  1. Disconnect the manifold absolute pressure (MAP) sensor 3P connector.
  2. Turn the ignition switch ON (II).
  3. Measure voltage between body ground and ECM/PCM connector terminal A21.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there about 5 V?

YES - Replace the MAP sensor.

NO - Go to step 53.

  1. Turn the ignition switch OFF.
  2. Disconnect ECM/PCM connector A (31P).