CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR.

1) Disconnect the connectors from ECM.

2) Measure the resistance of harness between ECM and electronic throttle control connector.

Connector & terminal

Euro 4 model

(B137) No. 23 — (E57) No. 5:
(B137) No. 24 — (E57) No. 4:
(B137) No. 31 — (E57) No. 3:

Euro 5 model

(B134) No. 19 — (E57) No. 5:
(B134) No. 18 — (E57) No. 4:
(B134) No. 29 — (E57) No. 3:

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 in harness between ECM and electronic throttle control connector • Poor contact of coupling connector • Poor contact of joint connector (Euro 4 model)