CHECK INPUT VOLTAGE OF ECM.

1) Turn the ignition switch to ON.

2) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B134) No. 7 (+) — Chassis ground (−):

(B135) No. 2 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Check ignition control system.

Repair the open or ground short circuit of harness between ECM connector and main relay connector.