Subaru 2009 IMPREZA Service Manual page 1565

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK HARNESS BETWEEN ECM AND
PURGE CONTROL SOLENOID VALVE 2
CONNECTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
purge control solenoid valve 2.
3) Turn the ignition switch to ON.
4) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B136) No. 7 (+) — Chassis ground (–):
2 CHECK PURGE CONTROL SOLENOID
VALVE 2.
1) Turn the ignition switch to OFF.
2) Measure the resistance between purge con-
trol solenoid valve 2 terminals.
Terminals
No. 1 — No. 2:
Check
Is the voltage 10 V or more?
Is the resistance less than 1 ? Replace the purge
EN(H4DOTC)(diag)-344
Yes No
Repair the short to Go to step 2.
power in the har-
ness between
ECM and purge
control solenoid
valve 2 connector.
Repair the poor
control solenoid contact of ECM
valve 2. <Ref. to connector.
EC(H4DOTC)-11,
Purge Control
Solenoid Valve.>