Subaru IMPREZA GD 2007 Series Manual page 340

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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK FOR ANY OTHER DTC ON DISPLAY. Is any other DTC displayed?
2 CHECK HARNESS BETWEEN ECM AND
STARTER INTERLOCK RELAY.
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 (–):
NOTE:
For AT model, measure the voltage with select
lever in "P" or "N".
Check
Is the voltage 10 V or more?
EN(H4SO)(diag)-231
ENGINE (DIAGNOSTICS)
Yes No
Check the appro- Go to step 2.
priate DTC using
the "List of Diag-
nostic Trouble
Code (DTC)".
<Ref. to
EN(H4SO)(diag)-
72, List of Diagnos-
tic Trouble Code
(DTC).>
Repair the short Repair poor con-
circuit to power in tact of the ECM
the harness connector.
between ECM and
starter interlock
relay.