Test Procedure

NOTE:

When the door is opened or the Ignition is turned to the ON position the fuel pump may be activated for 2 seconds to build up the pressure in the fuel system.

Step	Procedure	Result / Action to Take
1	PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK -- Was complaint verified?	-- YES: GO TO: Step 2. NO: Gather more Information from customer about the complaint.
2	IGNITION: ON LISTEN: Transfer Fuel Pump -G6- Should be heard running for 2 s SPECIFIED VALUE: Transfer Fuel Pump ON for 2 s IGNITION: OFF -- Was value obtained?	-- YES: Condition may be intermittent. PERFORM: Visual Inspection of wiring and component. CHECK: wiring for open, high resistance, short or electrical connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 7 NO: GO TO: Step 3
3	DISCONNECT: Fuel Pump Control Module -J538- IGNITION: ON CHECK: Fuel Pump Control Module -J538- harness connector terminals 3 to 4 for voltage CHECK: Fuel Pump Control Module -J538- harness connector terminal 4 to battery voltage for voltage SPECIFIED VALUE: Battery voltage IGNITION: OFF -- Was value obtained?	-- YES: GO TO: Step 4 NO: PERFORM: Visual Inspection of wiring and component CHECK: wiring for open, high resistance, short or electrical connector for damage, corrosion, loose or broken terminals REPAIR: faulty wiring or connector REPLACE: Any open fuses GO TO: Step 7
4	RECONNECT: Fuel Pump Control Module -J538- DISCONNECT: Transfer Fuel Pump -G6- CRANK: Engine CHECK: Transfer Fuel Pump -G6- wiring connector terminals 1 to 5 for voltage while engine is cranking IGNITION: OFF SPECIFIED VALUE: 7 - 11 V -- Was value obtained?	-- YES: REPLACE: Transfer Fuel Pump -G6-, Refer to proper repair manual for removal and replace procedures GO TO: Step 7 NO: GO TO: Step 5
5	DISCONNECT: Fuel Pump Control Module -J538- CHECK: Transfer Fuel Pump -G6- wiring connector terminal 1 to Fuel Pump Control Module -J538- wiring connector terminal 1 for resistance CHECK: Transfer Fuel Pump -G6- wiring connector terminal 5 to Fuel Pump Control Module -J538- wiring connector terminal 2 for resistance SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω) -- Were values obtained?	-- YES: GO TO: Step 6 NO: PERFORM: Visual Inspection of wiring and component CHECK: wiring for open, high resistance, short or electrical connector for damage, corrosion, loose or broken terminals REPAIR: faulty wiring or connector GO TO: Step 7
6	REMOVE: Engine Control Module -J623-. Refer to the appropriate repair manual. CHECK: Fuel Pump Control Module -J538- wiring connector terminal 5 to Engine Control Module -J623- wiring connector terminal T91 / 9 for resistance SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω) -- Were values obtained?	-- YES: REPLACE: Fuel Pump (FP) Control Module -J538-. Refer to the appropriate repair manual. GO TO: Step 7 NO: PERFORM: Visual Inspection of wiring and component CHECK: wiring for open, high resistance, short or electrical connector for damage, corrosion, loose or broken terminals REPAIR: faulty wiring or connector GO TO: Step 7
7	Final Procedure Perform a road test to verify repair. Do any DTC's return:	-- YES: CHECK: Engine Control Module -J623- harness connector for any damaged, pushed-out pins. REPAIR: As necessary. Clear the DTC's. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY Repair is complete. Generate Readiness Code. Refer to READINESS CODES . Return vehicle to Customer. If all electrical connections are OK: REPLACE: Engine Control Module -J623-. Refer to appropriate repair manual. Repair is complete. Generate Readiness Code. Refer to READINESS CODES . Return vehicle to Customer. -- NO: Perform the diagnostic procedure for any DTC's. If no DTC's return the repair is complete. Return vehicle to customer.