CHECK WIRING HARNESS.

1) Disconnect the connector from ECM.

2) Using a tester, check continuity between the power supply CM connector and the ECM connector.

Connector & terminal

Turbo model

(B420) No. 2 — (B136) No. 22:

Non-turbo model

(B420) No. 2 — (B135) No. 25:

Diesel engine model

(B420) No. 2 — (B135) No. 11:

QUESTION

Is there continuity?

Yes No

Repair or replace the open circuit of harness.