LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Audi >> 2009 >> S5 Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> GENERIC SCAN TOOL [CAUA] (2 Of 2) (COUPE) >> Generic Scan Tool >> Diagnosis And Testing >> Diagnostic Procedures >> Accelerator Pedal Module - GX2-, Checking >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Accelerator Pedal Module - GX2-, Checking: Notes

General Description 

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

The Accelerator Pedal Module - GX2- Contains The Following Components: 

The Accelerator Pedal Module - GX2- Components Cannot Be Serviced Separately, And They Must Be Serviced As A Unit.

Special Tools And Workshop Equipment Required 

Test Requirements 

Test Procedure 

Step Procedure Result / Action to Take
  • PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK .
-- Was Complaint verified?
-- YES: -- NO:
  • GATHER more information from customer about the complaint.
  • IGNITION: OFF.
  • 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 - 99%.
  • 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 harness connector for damage, corrosion, loose or broken terminals.
  • REPAIR: Faulty wiring or connector.
  • GO TO: Step 6 Accelerator Pedal Module - GX2-, CHECKING - 6 .
-- NO:
  • DISCONNECT: Accelerator Pedal Module - GX2- harness connector.
  • IGNITION: ON.
  • CHECK: Accelerator Pedal Module - GX2- harness connector terminals 1 to 5 and 2 to 3 for voltage.
  • IGNITION: OFF.
  • SPECIFIED VALUE: About 5.0 V.
-- Were Values obtained?
-- YES: -- NO:
  • REMOVE: Engine/Motor Control Module -J623-. Refer to appropriate service information.
  • CHECK: Accelerator Pedal Module - GX2- harness connector terminal 4 to the Engine/Motor Control Module -J623- harness connector T94 / 79 for resistance.
  • CHECK: Accelerator Pedal Module - GX2- harness connector terminal 6 to the Engine/Motor Control Module -J623- harness connector T94 / 57 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Were Values obtained?
-- YES: -- 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 6 Accelerator Pedal Module - GX2-, CHECKING - 6 .
  • REMOVE: Engine/Motor Control Module -J623-. Refer to appropriate service information.
  • CHECK: Accelerator Pedal Module - GX2- harness connector terminal 1 to the Engine/Motor Control Module -J623- harness connector T94 / 58 for resistance.
  • CHECK: Accelerator Pedal Module - GX2- harness connector terminal 2 to the Engine/Motor Control Module -J623- harness connector T94 / 80 for resistance.
  • CHECK: Accelerator Pedal Module - GX2- harness connector terminal 3 to the Engine/Motor Control Module -J623- harness connector T94 / 78 for resistance.
  • CHECK: Accelerator Pedal Module - GX2- harness connector terminal 5 to the Engine/Motor Control Module -J623- harness connector T94 / 56 for resistance.
  • SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Were Values obtained?
-- YES: -- 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 6 Accelerator Pedal Module - GX2-, CHECKING - 6 .
Refer to the Final Procedure Below