CHECK INPUT VOLTAGE OF ECM.

1) Turn the ignition switch to OFF.

2) Connect the connector to ECM.

3) Turn the ignition switch to ON.

4) Measure the voltage between ECM and chassis ground.

Connector & terminal

(B136) No. 3 (+) — Chassis ground (−):

(B136) No. 4 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Check ignition control system.

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit in harness between ECM and main relay connector

• Poor contact of main relay connector