Subaru Legacy BN/BS (2015-2019) Service Manual: Fuel pump circuit

Subaru Legacy BN/BS (2015-2019) Service Manual / Engine (diagnostics)(h6do) / Diagnostics for engine starting failure / Fuel pump circuit

CAUTION:

After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROCEDURE.

STEP	CHECK	YES	NO
1.CHECK OPERATING SOUND OF FUEL PUMP. Make sure that the fuel pump operates for two seconds when turning the ignition switch to ON. NOTE: Fuel pump operation can be executed using the Subaru Select Monitor. For detailed operation procedures, refer to the “Active Test”. Active Test	Does the fuel pump emit operating sound-	Check the fuel injector circuit. Diagnostics for Engine Starting Failure > FUEL INJECTOR CIRCUIT	Display the DTC. Read Diagnostic Trouble Code (DTC) > OPERATION

Check power supply and ground line of engine control module (ecm)

CAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROCEDURE.WIRING DIAGRAM:• Engine Electrical S ...

Ignition control system

CAUTION:After servicing or replacing faulty parts, perform Clear Memory Mode Clear Memory Mode > OPERATION, and Inspection Mode Inspection Mode > PROCEDURE.WIRING DIAGRAM:• Engine Electrical S ...

Other materials:

Dtc p0072 ambient air temperature sensor circuit "a" low
DTC DETECTING CONDITION:Immediately at fault recognitionSTEPCHECKYESNO1.CHECK DTC.Check for DTC. Read Diagnostic Trouble Code (DTC)Is P0072 or P0073 displayed in «Present fault»- Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0072 AMBIENT AIR TEMPERATURE SENSOR CIRCUIT "A" LOWEven ...