Checking accelerator pedal position senders: Audi TT Mk1 1.8 (BAM, BFV)

🧭 Before you start

Fits: Audi TT Mk1 (8N)

Don't miss

• Connect vehicle diagnostic, testing and information systemVAS 5051 A and select vehicle system "“01 - Engine electronics”". The ignition must be switched on when doing so.
• The engine control unit converts the voltage values of the angle senders into a percentage referenced to 5 V and displays these percentage values (5 V supply voltage corresponds to 100 %).
• The value displayed in zone (3) must always be roughly twice that in display zone (4).
• (Item 1) and (Item 3) can be ignored.
• Connect 121-pin adapter cableV.A.G 1598/31 (test box) to wiring harness to engine control unit, but do not connect actual engine control unit .

🔧 Engine codes this applies to

📐 54 workshop diagrams for BAM

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Connect vehicle diagnostic, testing and information systemVAS 5051 A and select vehicle system "“01 - Engine electronics”". The ignition must be switched on when doing so.
2. From list (1), select diagnosis function "“08 - Reading measured value block”".
3. Use keypad (2) to enter "“62”" for "“display group 062”" and confirm by touching Q key.
4. Check displays in zones (3) and (4). [Note: The engine control unit converts the voltage values of the angle senders into a percentage referenced to 5 V and displays these percentage values (5 V supply voltage corresponds to 100 %).]
5. Observe the response of the displays in zones (3) and (4) whilst slowly flooring the accelerator pedal. [Note: The value displayed in zone (3) must always be roughly twice that in display zone (4).]

6. Terminate function "“08 - Reading measured value block”" by touching ← key.
7. Check power supply and wiring of accelerator pedal position senders as described in the following.
8. Remove driver's storage compartment General body repairs, interior68.
9. Unplug connector (2) for accelerator pedal position sender. [Note: (Item 1) and (Item 3) can be ignored.]
10. Switch on ignition.
11. Connect up multimeter (voltage measuring range) as follows:
12. Additionally check signal wires.
13. Check wiring from engine control unit to accelerator pedal position senders.
14. Connect 121-pin adapter cableV.A.G 1598/31 (test box) to wiring harness to engine control unit, but do not connect actual engine control unit .
15. Check for open circuit and short to earth or positive in the following wiring:
16. Repair wiring if necessary.
17. Replace accelerator pedal position senders Fuel supply system, petrol engines20.

Other AUDI procedures

• Checking intake air temperature sender G42 – Audi A6 C5
• Removing and installing tank flap unit – Audi A3 1.8
• Checking continued coolant circulation pump V51 – Audi A6 C5
• Checking power assisted steering pressure switch F88
• Checking vehicle speed signal – Audi A6 C5
• Removing and installing toothed belt – Audi · 56 torque figures
• Removing engine – Audi A8 D3 · 41 torque figures
• Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
• Installing engine – Audi A8 D4 · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures