Removing and installing engine control unit J623 with protective housing, Scirocco — VW

🧭 Before you start

Fits: VW Golf Cabriolet (517, 2011–2016); platform code 138

• Special tools named: locking bar

🔧 Engine codes this applies to

📋 Procedure

1. Switch on ignition and select the following menu options on vehicle diagnostic tester:
2. Switch off ignition and remove ignition key.
3. Remove wiper arms, plenum chamber cover and plenum chamber bulkhead General body repairs, exterior50Plenum chamber bulkhead; Removing and installing plenum chamber bulkhead.
4. Push retaining frame in (direction of arrow), and remove engine control unit.
5. Unscrew shear-head bolts (arrows) using a pair of pliers.

6. Insert screwdriver between both locking plates (arrow).
7. Carefully press screwdriver in (direction of arrow) and bend locking clamp (1) upwards at same time.
8. Bend locking bar (1) in (direction of arrow) until it can be pulled off connectors.
9. Push locking devices of connectors in (direction of arrow) and pull off connectors.
10. Fit connectors to engine control unit.
11. Push locking devices to stop in (direction of arrow).
12. Fit retaining bar (1) onto connectors and press it in direction of (arrow).
13. Guide pin (2) to stop into hole on engine control unit.
14. Use new shear-head bolts (arrows) to secure retaining bar on engine control unit.
15. Evenly tighten shear-head bolts until bolt heads shear off (arrows).
16. Insert engine control unit into retaining frame and push retaining frame upwards in direction of (arrow).
17. Install wiper arms, plenum chamber cover and plenum chamber bulkhead General body repairs, exterior50Plenum chamber bulkhead; Removing and installing plenum chamber bulkhead.
18. Switch on ignition and select the following menu options on vehicle diagnostic tester:

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