Accelerator Pedal Module -GX2-, Checking

Function

The Accelerator Pedal Module -GX2- is comprised of an Accelerator Pedal Position Sensor -G79- and Accelerator Pedal Position Sensor 2 -G185- are combined in one component and integrated into the Accelerator Pedal Module. They are used to detect the position of the accelerator pedal throughout the entire adjustment range. The Engine Control Module - J623- detects the driver's request from these signals and uses them to calculate the injection quantity and EPC Throttle valve operation.

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.
Observe all safety precautions: SAFETY PRECAUTIONS .
View clean working conditions: CLEAN WORKING CONDITIONS .
For Hybrid vehicles refer to: HIGH VOLTAGE SYSTEM GENERAL WARNINGS .

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	CONNECT: Scan Tool. IGNITION: ON. CHECK: Throttle valve position closed: SPECIFIED VALUE: 3 - 25%. DEPRESS: Accelerator pedal slowly to WOT while observing the percentage display. The percentage display must increase uniformly. CHECK: Throttle valve position at WOT: SPECIFIED VALUE: 84 - 97%. IGNITION: OFF. -- Was Value obtained?	-- YES: GO TO Step 3. -- NO: GO TO Step 4.
3	Condition may be intermittent. 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 6.
4	DISCONNECT: Accelerator Pedal Module -GX2- harness connector. IGNITION: ON. CHECK: Accelerator Pedal Module -GX2- harness connector terminals 2 to 3 and 1 to 5 for voltage. SPECIFIED VALUE: About 5.0 V. IGNITION: OFF. -- Were Values obtained?	-- YES: GO TO Step 5. -- NO: GO TO Step 6.
5	REMOVE: Engine Control Module - J623-. Refer to appropriate Service Information. CHECK: Accelerator Pedal Module -GX2- harness connector terminal 4 to the Engine Control Module - J623- harness connector T94 / 79 for resistance. CHECK: Accelerator Pedal Module -GX2- harness connector terminal 6 to the Engine Control Module - J623- harness connector T94 / 57 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: REPLACE: Accelerator Pedal Module -GX2-. Refer to appropriate Service Information. GO TO: Step 7. -- 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 7.
6	REMOVE: Engine Control Module - J623-. Refer to appropriate Service Information. CHECK: Accelerator Pedal Module -GX2- harness connector terminal 1 to the Engine Control Module - J623- harness connector T94 / 58 for resistance. CHECK: Accelerator Pedal Module -GX2- harness connector terminal 2 to the Engine Control Module - J623- harness connector T94 / 80 for resistance. CHECK: Accelerator Pedal Module -GX2- harness connector terminal 3 to the Engine Control Module - J623- harness connector T94 / 78 for resistance. CHECK: Accelerator Pedal Module -GX2- harness connector terminal 5 to the Engine Control Module - J623- harness connector T94 / 56 for resistance. SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: REPLACE Engine Control Module -J623-. Refer to appropriate Service Information. GO TO: Step 7. -- 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 7.
7	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.