CHECK WIRING HARNESS.

1) Disconnect the ECM connector (B136) and power supply CM connector.

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

Connector & terminal

(B420) No. 39 — (B135) No. 21:

QUESTION

Is there continuity?

Yes No

Repair or replace the open circuit of harness.