CHECK OUTPUT SIGNAL OF ECM.

1) Turn the ignition switch to OFF.

2) Connect the test mode connector at the lower portion of instrument panel (on the driver’s side).

3) Turn the ignition switch to ON.

4) Measure the voltage between ECM and chassis ground while operating the purge control solenoid valve.

NOTE:

Purge control solenoid valve operation can be executed using Subaru Select Monitor. For procedure, refer to “Compulsory Valve Operation Check Mode”.

Connector & terminal

(B137) No. 29 (+) — Chassis ground (−):

QUESTION
Is the voltage 0 — 10 V?
Yes	No
	Even if the malfunction indicator light illuminates, the circuit has returned to a normal condition at this time. In this case, repair the poor contact in ECM connector.