Idle Control System

DTC Troubleshooting (cont'd)

11-418  

  1. Connect the IAC valve 3P connector terminal No. 3 and body ground with a jumper wire.

IAC VALVE 3P CONNECTOR

Wire side of female terminals

  1. Check for continuity between ECM/PCM connector terminal A12 and body ground.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there continuity?

YES

- Go to step 13.

NO

- Repair open in the wire between the IAC valve and the ECM/PCM (A12).


  1. Reconnect the IAC valve 3P connector.
  2. Turn the ignition switch ON (II).

  1. Measure voltage between body ground and ECM/PCM connector terminal A12.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there battery voltage?

YES

- Substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.

NO

- Replace the IAC valve.