CHECK COMMUNICATION CIRCUIT HARNESS.

Measure the voltage between ECM harness connector terminal and engine ground.

Connector & terminal

Turbo model

(B136) No. 26 (+) — Engine ground (−):
(B136) No. 34 (+) — Engine ground (−):

Non-turbo model

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

Diesel engine model

(B135) No. 5 (+) — Engine ground (−):

QUESTION
Is the voltage 0 V?
Yes	No
	Because the battery voltage or ignition switch “ON” circuit is shorted, repair the harness between the body integrated unit and ECM.