Checking injection timing device control range — VW
Checking injection timing device control range on VW: 15 steps, engines AGD, AKU, ASX. 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 code 6N1
- Renewed: engine control unit
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- Connect fault readerV.A.G 1551 or vehicle system testerV.A.G 1552 and select engine electronics control unit with "“address word 01”". Engine must be idling.
📋 Procedure
- Connect fault readerV.A.G 1551 or vehicle system testerV.A.G 1552 and select engine electronics control unit with "“address word 01”". Engine must be idling.
- Press keys 0 and 4 for function "“Initiate basic settings”" and confirm entry with Q key.
- Press keys 0, 0 and 4 for "“Display group number 4”" and confirm entry with Q key.
- Press → key.
- Press keys 0 and 6 for function "“End output”" and confirm entry with Q key.
- Switch off ignition.
- Check commencement of injection valve N108 as follows:
- Disconnect 10-pin connector for commencement of injection valve N108 (connector to injection pump quantity adjuster).
- Measure resistance between connector contacts 9+10.
- Renew commencement of injection valve N108.
- Read fault memory, if necessary, repair any faults and then clear fault memory , Reading and clearing fault memory.
- Connect adapter cable, 121-pinV.A.G 1598/31 to control unit wiring harness. The engine control unit remains disconnected.
- Check lines between adapter cable, 121-pinV.A.G 1598/31 and 10-pin connector for open circuit according to current flow diagram. Contact 9 + socket 114 Contact 10 + socket 1 Contact 10 + socket 2.
- Also check wiring for short to one another, short to vehicle earth and short to battery positive.
- Renew engine control unit .
Other VW procedures
- Removing and installing parts of the lubrication system
- Checking throttle valve
- Checking variable intake manifold flap change-over valve N239
- Checking commencement of injection valve N108
- Checking exhaust gas recirculation valve N18 voltage supply
- 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.