CHECK WIRING HARNESS.

1) Disconnect the ECM connector and power supply CM connector.

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

Connector & terminal

Gasoline engine model (Euro 4)

(B420) No. 39 — (B135) No. 21:

Gasoline engine model (Euro 5)

(B420) No. 39 — (B136) No. 34:

Diesel engine model

(B420) No. 39 — (B135) No. 83:

QUESTION

Is there continuity?

Yes No

Repair or replace the open circuit of harness.