CHECK INPUT SIGNAL OF ECM.

Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B137) No. 25 (+) — Chassis ground (−):

QUESTION

Does the voltage change by shaking the harness and connector of ECM while monitoring the value on voltage meter?

Yes No

Repair the poor contact of ECM connector.

Contact your SUBARU distributor service.

NOTE:

The probable cause is considered as the deterioration of multiple parts.