CHECK ECM SIGNAL.

1) Start the engine.

2) Measure the voltage between ECM connector and engine ground.

Connector & terminal

2.0 L model

(B135) No. 25 (+) — Engine ground (−):

2.5 L model

(B136) No. 22 (+) — Engine ground (−):

QUESTION

Is the voltage 0 ← → 14 V?

Yes No

Inspect the ECM.