Coding airbag control unit J234 with fault readerV.A.G 1551 — VW
Coding airbag control unit J234 with fault readerV.A.G 1551 on VW: 13 steps. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: platform codes 1H1, 1H2
📋 Procedure
- Connect fault reader .
- Switch on ignition.
- Press key (1) for "“rapid data transfer”" mode.
- Press keys (1) and (5) (the address word of the vehicle system to be tested "“Airbag”" is entered with 15).
- Confirm entry with the Q key.
- Press → key.
- Press keys (0) and (7) (with 07 the function "“Code control unit”" is selected).
- Confirm entry with the Q key.
- Enter code number according to the table:
- Confirm entry with the Q key.
- Press → key.
- Press keys (0) and (6) to end the output.
- Confirm entry with the Q key.
Other VW procedures
- 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
- Removing and installing bottom section of sump – VW 3.0 TDI
- Removing and installing Haldex coupling, generation IV
- Removing and installing alternator with voltage regulatorCX1, 2.0 l TSI engine, 155 kW
- Removing and installing E-box, in luggage compartment · 2 torque figures
- Removing: seat, manually height-adjustable · 2 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.