Checking air conditioner compressor cut-out: Audi TT Mk1 1.8 (ARX, ARY, AUM, AUQ, …)
Step-by-step checking air conditioner compressor cut-out for the Audi TT Mk1 1.8: 11 steps. What to remove, in what order, and what to check after.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi TT Mk1 (8N)
- Special tools named: V.A.G 1598/31
Don't miss
- Connect vehicle diagnostic, testing and information systemVAS 5051 A and select vehicle system "“01 - Engine electronics”" from list. Engine must be idling.
- Connect adapter cable, 121-pin V.A.G 1598/31 (test box) to wiring harness for engine control unit, but do not connect the engine control unit itself .
📋 Procedure
- Connect vehicle diagnostic, testing and information systemVAS 5051 A and select vehicle system "“01 - Engine electronics”" from list. Engine must be idling.
- From the list (1) select diagnostic function "“08 - Read measured value block”".
- Use keypad (2) to enter "“50”" for "“Display group number 050”" and confirm by touching the Q key.
- Check display in zone (4):
- Switch off air conditioner.
- Switch on air conditioner with "“Auto”" button and set air conditioner to maximum cooling/heating output; the compressor should run.
- Floor and release the accelerator quickly (short blip).
- Connect adapter cable, 121-pin V.A.G 1598/31 (test box) to wiring harness for engine control unit, but do not connect the engine control unit itself .
- Check for open circuit and short to positive or earth in the following wiring:
- Repair wiring connection if necessary.
- Check operation of air conditioner Heating, air conditioning01.
Other AUDI procedures
- Installing engine – Audi A8 D4 · 36 torque figures
- Removing and installing cylinder head – Audi A2 · 24 torque figures
- Removing and installing drive plate – Audi A4 B5 · 17 torque figures
- Removing and installing turbocharger – Audi A8 D4 · 10 torque figures
- Removing and installing sump – Audi · 10 torque figures
- 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
- Removing and installing camshaft timing chain · 29 torque figures
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.