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:

Disassembly
To detect the real cause of trouble, inspect the following items before disassembling.• Tooth contact and backlash between hypoid driven gear and drive pinion• Hypoid driven gear runout on its back surface• Total preload of drive pinion1. Set the ST on vise and install the differen ...