CHECK INHIBITOR SWITCH CIRCUIT.

1) Turn the ignition switch to OFF.

2) Disconnect the inhibitor switch harness connector.

3) Turn the ignition switch to ON.

4) Measure the voltage between harness connector terminal and chassis ground.

Connector & terminal

(T7) No. 12 (+) — Chassis ground (−):

QUESTION

Is the voltage approx. 5 V?

Yes No

Check for open or short in the harness between inhibitor switch and ECM.