CHECK INPUT VOLTAGE OF ECM.

1) Turn the ignition switch to OFF.

2) Install the main relay.

3) Turn the ignition switch to ON.

4) Measure the voltage between ECM and chassis ground.

Connector & terminal

(B136) No. 23 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the open circuit in harness between ECM and main relay connector.