Removing and installing engine control unit without protective housing — AUDI

🧭 Before you start

Fits: Audi TT Mk1 (8N)

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• 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.
• Always start by displaying and printing out the control unit identification.
• Unplugging the connectors of the engine control unit erases the adaption values. The content of the fault memory is retained.

🔧 Engine codes this applies to

📐 20 workshop diagrams for AJK

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. Always start by displaying and printing out the control unit identification.
3. Switch off ignition and remove ignition key.
4. Use a screwdriver to prise the caps off the wiper arms (arrows) and unfasten the hexagon nuts by several turns.
5. Release the wiper arms from the wiper shaft by tilting slightly.

6. Completely unscrew hexagon nuts and detach wiper arms.
7. Detach rubber seal (2) of plenum chamber cover.
8. Detach plenum chamber cover (3) and set down towards windscreen.
9. Unplug washer jet heating connectors.
10. Release catches (arrow) and unplug multi-pin connectors of control unit. [Note: Unplugging the connectors of the engine control unit erases the adaption values. The content of the fault memory is retained.]
11. Bend back retainer tab of mount.
12. Activate engine control unit in "“Guided fault-finding”" routine under diagnosis item "“Engine control unit replacement”".

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