CHECK HARNESS BETWEEN ECM AND ENGINE GROUND.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from ECM.

3) Connect the delivery (test) mode connector.

4) Measure the resistance of harness between ECM and engine ground.

Connector & terminal

Euro 4 model

(B135) No. 22 — Chassis ground:

Euro 5 model

(B136) No. 35 — Chassis ground:

QUESTION

Is the resistance less than 1 Ω?

Yes No

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit of harness between ECM and engine ground

• Poor contact of each connector between ECM connector and engine ground