Removing and installing engine control unit J623 with protective housing (Sharan) — VW

🧭 Before you start

Fits: VW Sharan II / SEAT Alhambra (7N, 2010–)

• Special tools named: locking bar
• Renewed: engine control unit

🔧 Engine codes this applies to

📐 60 workshop diagrams for CAVA

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

📋 Procedure

1. If you wish to renew the engine control unit, connect and carry out guided function "“Renew engine control unit”".
2. Switch off ignition.
3. Remove wiper arms Electrical system92Windscreen wiper system; Removing and installing wiper arms.
4. Remove plenum chamber cover General body repairs, exterior64Flush bonded windows; Assembly overview - plenum chamber cover.
5. Remove plenum chamber bulkhead General body repairs, exterior50Body - front; Plenum chamber bulkhead.

6. Raise engine control unit (1) in front area in (direction of arrow).
7. Pull engine control unit forwards out of the side guides (2).
8. Bend upwardly projecting tabs (1) of locking bar outwards.
9. Unscrew shear-head bolts (2) using a pair of pliers and remove locking bar (3).
10. Slide connector locking devices (1) on engine control unit in (direction of arrow) and pull off both connectors.
11. Attach connectors to engine control unit and slide locking devices inwards until they engage.
12. Screw on a new locking bar (3) with new shear-head bolts (2) and tighten bolts uniformly until just before heads shear off.
13. Push engine control unit (1) into side guides (2) in the (direction of arrow).
14. Install plenum chamber bulkhead General body repairs50Body - front; Plenum chamber bulkhead.
15. Install plenum chamber cover General body repairs, exterior64Flush-bonded windows; Assembly overview - plenum chamber cover.
16. Install wiper arms Electrical system92Windscreen wiper system; Removing and installing wiper arms.

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