Removing and installing engine control unit with no anti-theft protection — VW

🧭 Before you start

Fits: platform codes 602, 604, 603

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• The readiness code must be generated if the event memory has been cleared.

🔧 Engine codes this applies to

📐 62 workshop diagrams for CLNA

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

📋 Procedure

1. Switch off ignition.
2. Switch off ignition.
3. Release connectors on engine control unit and pull off connector.
4. Press clips (arrows A) outwards and pull engine control unit out to side (B).
5. Insert new engine control unit and press to the left.

6. Fit connectors and lock in position.
7. If engine control unit has been renewed, clear learnt values and adapt engine control unit Vehicle diagnostic tester"“Guided function”".
8. Read event memory, rectify any faults and then clear event memory "“Guided fault finding”".
9. The readiness code must be generated if the event memory has been cleared.
10. Carry out a road test.
11. Read control unit event memory again.

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