Subaru IMPREZA GD 2007 Series Manual page 1577

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
2 CHECK HARNESS BETWEEN ECM AND IG-
NITION SWITCH.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM.
3) Turn the ignition switch to ON.
4) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B136) No. 32 (+) — Chassis ground (–):
Check
Is the voltage 10 V or more?
EN(STI)(diag)-246
Yes No
Check the appro- Go to step 2.
priate DTC using
the "List of Diag-
nostic Trouble
Code (DTC)".
<Ref. to
EN(STI)(diag)-71,
List of Diagnostic
Trouble Code
(DTC).>
Repair the short Repair poor con-
circuit to power in tact of the ECM
the harness connector.
between ECM and
ignition switch.