CHECK VDCCM POWER SUPPLY.

1) Disconnect the connectors from VDCCM.

2) Start the engine.

3) Run the engine at idle.

4) Measure the voltage between VDCCM connector and chassis ground.

Connector & terminal

(B310) No. 28 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 — 15 V?

Yes No

Repair the power supply circuit of the VDCCM.