Model Without Push Button Start
DTC detecting condition:
Immediately at fault recognition
Trouble symptom:
Failure of engine to start
Wiring diagram:
Engine Electrical System Ref. to WIRING SYSTEM>ENGINE ELECTRICAL SYSTEM .
CAUTION:
Use the check board when measuring the ECM terminal voltage and resistance.
Ref. to ENGINE (DIAGNOSTICS) (H4DO)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD
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NOTE:
After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure.
Ref. to ENGINE (DIAGNOSTICS) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE
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- CHECK DTC
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- Turn the ignition switch to ON.
- Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. to COMMON(DIAG)>CLEAR MEMORY .
- Start and idle the engine for three minutes or more.
- Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. to COMMON(DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .
Is DTC P0512 displayed? (Current malfunction)
Yes: Go to 2 .
No: Even if DTC is detected, the circuit has returned to a normal condition at this time.
Reproduce the failure, and then perform the diagnosis again.
NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause. - CHECK HARNESS BETWEEN ECM AND IGNITION SWITCH (SHORT TO POWER SUPPLY)
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- Turn the ignition switch to OFF.
- Disconnect the connector from ECM.
- Turn the ignition switch to ON.
- Measure the voltage between ECM connector and engine ground.
Connector & terminal
(B134) No. 25 (+) - Engine ground (-):
Is the voltage 10 V or more?
Yes: Repair the short circuit to power supply in harness between ECM connector and ignition switch connector.
No: Repair the poor contact of ECM connector.