CHECK HARNESS BETWEEN ECM CONNECTOR AND CHASSIS GROUND TERMINAL.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from the ECM.

3) Measure the resistance of harness between ECM connector and chassis ground.

Connector & terminal

(B135) No. 27 — Chassis ground:

QUESTION

Is the resistance less than 5 Ω?

Yes No

Repair the short circuit to ground in harness between ECM and delivery (test) mode connector.

Replace the ECM.