CHECK INPUT VOLTAGE OF ECM.

1) Run the engine at idle.

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 less than 16.2 V?

Yes No

Repair the harness connectors between the battery, main relay and ECM.