Subaru IMPREZA GD 2007 Series Manual page 1555

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK HARNESS BETWEEN ECM AND
PURGE CONTROL SOLENOID VALVE.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
purge control solenoid valve.
3) Turn the ignition switch to ON.
4) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B137) No. 29 (+) — Chassis ground (–):
2 CHECK PURGE CONTROL SOLENOID
VALVE.
1) Turn the ignition switch to OFF.
2) Measure the resistance between purge con-
trol solenoid valve terminals.
Terminals
No. 1 — No. 2:
Check
Is the voltage 10 V or more?
Is the resistance less than 1 Ω? Replace the purge
EN(STI)(diag)-224
Yes No
Repair the short Go to step 2.
circuit to power in
the harness
between the ECM
and purge control
solenoid valve con-
nector.
Repair poor con-
control solenoid tact of the ECM
valve. <Ref. to connector.
EC(H4DOTC)-8,
Purge Control
Solenoid Valve.>