Checking accelerator position sender G79 - vehicles with 4-cylinder engine — AUDI
Checking accelerator position sender G79 - vehicles with 4-cylinder engine on Audi: 15 steps, engines AFB, AFN, AJM, AKE.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi A6 C5 (4B)
- Renewed: accelerator pedal module
Don't miss
- Connect adapterV.A.G 1598/22 to connectors on wiring harness; do not connect engine control unit 23.
- Connect adapter cable, 121-pinV.A.G 1598/31 to connectors of wiring harness; do not connect engine control unit. Connect earth clip of adapter cable to earth (not shown in illustration) 23.
📐 60 workshop diagrams for AFB
Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.
📋 Procedure
- From the list (1) select diagnostic function "“08 - Read measured value block”".
- In zone (2) enter 2 for "“display group 002”" and confirm the entry by pressing the Q key.
- Check values in zones (2) and (3).
- Press accelerator pedal down slowly
- Press the ← button to exit from the function "“08 - Read measured value block”".
- Press "“06 - End output”".
- Switch off ignition.
- Check that accelerator pedal moves freely; renew accelerator pedal module if necessary.
- Remove accelerator pedal module .
- Connect up multimeter for resistance measurement as follows.
- Renew accelerator pedal module.
- Connect adapterV.A.G 1598/22 to connectors on wiring harness; do not connect engine control unit 23.
- Connect adapter cable, 121-pinV.A.G 1598/31 to connectors of wiring harness; do not connect engine control unit. Connect earth clip of adapter cable to earth (not shown in illustration) 23.
- ⚠ To prevent damage to electronic components, select appropriate measuring range before connecting measuring leads and observe test requirements. — Check for open circuit and short to positive or earth in the following wiring:
- Repair wiring connection if necessary.
Ask TorqFix about your Audi AFB — it answers with the exact sequence for that engine and the workshop drawing for each step. First question is free after a 20-second sign-up, no card.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.