Fuel Pressure Sensor - G247-, CHECKING

Function

The Fuel Pressure Sensor -G247- measures the fuel pressure in the high-pressure fuel system. The Engine Control Module -J623- analyzes the signal and regulates the fuel high pressure through the Fuel Pressure Regulator Valve -N276- or Fuel Metering Valve 2 -N402- or Fuel Metering Valve -N290- (depending on vehicle) in the high-pressure pump.

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 Auto. Transmission, ensure Selector Lever position is in "P".
Vehicles with Man. Transmission, ensure Shifter Lever position is in "N" with Parking Brake applied.
Coolant Temperature: ≥ 80° C.
Observe all safety precautions. Refer to: SAFETY PRECAUTIONS .
View clean working conditions. Refer to: 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 Fuel Pressure Sensor - G247-, CHECKING . -- NO: GATHER more information from customer about the complaint.
2	DISCONNECT: Fuel Pressure Sensor -G247- harness connector. IGNITION: ON. CHECK: Fuel Pressure Sensor -G247- harness connector terminals 1 to 3 for voltage. SPECIFIED VALUE: About 5.0 V. IGNITION: OFF. -- Was Value obtained?	-- YES: GO TO Step 3 Fuel Pressure Sensor - G247-, CHECKING . -- NO: GO TO Step 4 Fuel Pressure Sensor - G247-, CHECKING .
3	REMOVE: Engine Control Module - J623-. Refer to appropriate repair service information. CHECK: Fuel Pressure Sensor -G247- harness connector terminal 2 to the Engine Control Module - J623- harness connector T60 / 25 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Was Value obtained?	-- YES: REPLACE: Fuel Pressure Sensor -G247-. Refer to appropriate repair service information. GO TO: Step 5 Fuel Pressure Sensor - G247-, CHECKING . -- NO: 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 Fuel Pressure Sensor - G247-, CHECKING .
4	REMOVE: Engine Control Module - J623-. Refer to appropriate repair service information. CHECK: Fuel Pressure Sensor -G247- harness connector terminal 1 to the Engine Control Module - J623- harness connector T60 / 14 for resistance. CHECK: Fuel Pressure Sensor -G247- harness connector terminal 3 to the Engine Control Module - J623- harness connector T60 / 26 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: REPLACE: Engine Control Module -J623-. Refer to appropriate repair service information. GO TO: Step 5 Fuel Pressure Sensor - G247-, CHECKING . -- NO: 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 Fuel Pressure Sensor - G247-, CHECKING .
5	Final Procedure Perform a road test to verify repair. Do any DTC's return:	-- YES: Check the DTC memory. Refer to: DIAGNOSTIC MODE 03 - READ DTC MEMORY . Perform the diagnostic procedure for that DTC. -- NO: Repair is complete. Generate readiness code. Refer to: READINESS CODE . Return vehicle to Customer.