CHECK HARNESS BETWEEN ECM AND POWER SUPPLY CM.

1) Turn the ignition to OFF.

2) Disconnect the connectors from the ECM.

3) Turn the ignition to ON.

4) Measure the voltage between ECM and chassis ground.

Connector & terminal

(B136) No. 34 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the short circuit to power supply in harness between ECM and power supply CM.

Repair the poor contact of the ECM connector.