CHECK HARNESS.

Measure the voltage between ECM connector terminal and engine ground.

Connector & terminal

Gasoline engine model (Euro 4)

(B135) No. 23 (+) — Engine ground (−):
(B135) No. 31 (+) — Engine ground (−):

Gasoline engine model (Euro 5)

(B135) No. 11 (+) — Engine ground (−):
(B135) No. 12 (+) — Engine ground (−):

Diesel engine model

(B134) No. 50 (+) — Engine ground (−):

QUESTION
Is the voltage 0 V?
Yes	No
	Repair the harness between body integrated unit and ECM.