CHECK INPUT VOLTAGE OF MAIN RELAY.

Measure the voltage between main relay connector and chassis ground.

Connector & terminal

(B220) No. 37 (+) — Chassis ground (−):

(B220) No. 39 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

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