Model Without Push Button Start
DTC detecting condition:
Immediately at fault recognition
Trouble symptom:
Failure of engine to start
Wiring diagram:
Engine Electrical system. Refer to WIRING SYSTEM>Engine Electrical System .
CAUTION:
Use the check board when measuring the ECM terminal voltage and resistance. Refer to ENGINE (DIAGNOSTICS) (H4DO)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD
.
NOTE:
After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Refer to ENGINE (Diagnostics) (H4DO)>Basic Diagnostic Procedure>PROCEDURE
.
- CHECK DTC
.
- Turn the ignition switch to ON.
- Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine] Refer 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]. Refer 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)
.
- 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
(B62) 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.