Removing and installing engine control unit J623, Scirocco — VW
Removing and installing engine control unit J623, Scirocco on VW: 11 steps, engines CBAA, CBAB, CBAC, CBBA.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Golf Cabriolet (517, 2011–2016); platform code 138
📋 Procedure
- Switch on ignition and select the following menu options on vehicle diagnostic tester:
- Switch off ignition, and remove ignition key.
- Remove wiper arms, plenum chamber cover and plenum chamber bulkhead General body repairs, exterior50Plenum chamber bulkhead; Removing and installing plenum chamber bulkhead.
- Push down retaining frame in direction of (arrow) and remove engine control unit.
- Push locking devices of connectors in (direction of arrow) and pull off connectors.
- Fit connectors to engine control unit.
- Push locking devices to stop in (direction of arrow).
- Insert engine control unit into retaining frame and push retaining frame upwards in direction of (arrow).
- Install wiper arms, plenum chamber cover and plenum chamber bulkhead General body repairs, exterior50Plenum chamber bulkhead; Removing and installing plenum chamber bulkhead.
- Connect battery Electrical system27Battery; Disconnecting and connecting battery.
- Switch on ignition and select the following menu options on vehicle diagnostic tester:
Other VW procedures
- Checking delivery rate of fuel system pressurisation pump G6, engine codes CBAA, CBAB, CBBB, CBDA, CBDB, CBDC, CJAA, CFFA, CFFB, CFGB, CFHB, CFHC, CLCA, CLJA
- Checking the fuel pump delivery rate for prepressurisation G6, engine codes CBAA, CBAB, CBBB, CBAC, CBDC
- Checking the fuel delivery rate of the fuel pump for delivery G6 (0.5 bar low-pressure fuel system)
- Removing and installing exhaust gas temperature sender 2 G448
- Toothed belt - exploded view
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing coolant pump · 53 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.