Low Fuel Pressure Sensor - G410-, Checking: Notes

General Description

The low-side fuel pressure is constantly monitored by the Low Fuel Pressure Sensor -G410- and sent to the Engine Control Module -J623-. If this pressure deviates from the desired pressure, the Engine Control Module -J623- sends a signal to the Fuel Pump Control Module -J538-. The Fuel Pump Control Module -J538- then sends a PWM signal to the Transfer Fuel Pump -G6- until the desired fuel pressure is achieved.

Special Tools And Workshop Equipment Required

Multimeter.
Wiring Diagram.
Scan Tool.

Test Requirements

Fuses OK.
Battery voltage OK.
Switch OFF all electrical and electronic accessories.
Vehicles with automatic transmission, ensure the selector lever position is in "P".
Vehicles with manual transmission, ensure the shifter lever position is in "N" with the parking brake applied.
Observe all safety precautions: SAFETY PRECAUTIONS .
View clean working conditions: CLEAN WORKING CONDITIONS .

Test Procedure

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 Low Fuel Pressure Sensor - G410-, CHECKING - 2 . -- NO: GATHER more information from customer about the complaint.
2	IGNITION: OFF. DISCONNECT: Low Fuel Pressure Sensor -G410- harness connector. IGNITION: ON. CHECK: Low Fuel Pressure Sensor -G410- harness connector terminals 1 to 3 for voltage. IGNITION: OFF. SPECIFIED VALUE: About 5.0 V. -- Was Value obtained?	-- YES: GO TO: Step 3 Low Fuel Pressure Sensor - G410-, CHECKING - 3 . -- NO: GO TO: Step 4 Low Fuel Pressure Sensor - G410-, CHECKING - 4 .
3	REMOVE: Engine Control Module -J623-. Refer to appropriate service information. CHECK: Low Fuel Pressure Sensor -G410- harness connector terminal 2 to the Engine Control Module -J623- harness connector T60 / 44 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: REPLACE: Low Fuel Pressure Sensor -G410-. Refer to appropriate service information. GO TO: Step 5 Low Fuel Pressure Sensor - G410-, CHECKING - 5 . -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 5 Low Fuel Pressure Sensor - G410-, CHECKING - 5 .
4	REMOVE: Engine Control Module -J623-. Refer to appropriate service information. CHECK: Low Fuel Pressure Sensor -G410- harness connector terminal 1 to the Engine Control Module -J623- harness connector T60 / 50 for resistance. CHECK: Low Fuel Pressure Sensor -G410- harness connector terminal 3 to the Engine Control Module -J623- harness connector T60 / 35 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: GO TO: Step 5 Low Fuel Pressure Sensor - G410-, CHECKING - 5 . -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 5 Low Fuel Pressure Sensor - G410-, CHECKING - 5 .
5	Refer To The Final Procedure Below;