CHECK INPUT VOLTAGE OF ECM.

1) Turn the ignition switch to ON.

2) Measure the voltage between ECM and chassis ground.

Connector & terminal

(B135) No. 10 (+) — Chassis ground (−):

(B136) No. 5 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the open or ground short circuit of power supply circuit.