Removing and installing energy management control unit J644 - vehicles up to model year 2008 — AUDI
Removing and installing energy management control unit J644 - vehicles up to model year 2008 on Audi: 17 steps.
Workshop procedure for AUDI — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: Audi Q7 (4L, 2005–2015)
📋 Procedure
- When renewing control unit select "“Replacement”" function for appropriate control unit in "“Guided Fault Finding”" or "“Guided Functions”"vehicle diagnostic tester.
- Remove driver's seat 72.
- Switch off ignition and take out ignition key.
- Remove bolt (2) and lift out footwell vent (1).
- Release retaining clips on rear of cover (1) in direction of arrows (A).
- Then remove cover from driver's seat bracket in direction of arrow (B).
- Pry cover (1) out of floor covering using removal lever80 - 200.
- Lift floor covering (2) slightly in the vicinity of earth cable.
- Unscrew nut (3) and detach earth cable (4) from earth point.
- Pry covers (1) and (3) out of floor covering using removal lever80 - 200.
- Pry cover (3) out of floor covering using removal lever80 - 200.
- Remove two front bolts (1) from driver's seat bracket and tilt seat bracket (2) upwards.
- Unplug the electrical connector (5) by releasing catch and pivoting the retaining clip.
- Detach earth cable (3) leading to battery from energy management control unit J644.
- First unscrew cap nut (4) then cap nut (1).
- Remove the energy management control unit J644(item 2).
- Install bracket with driver's seat 72.
Other AUDI procedures
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- Removing camshaft timing chain from camshafts – Audi A6/A7 C7 · 38 torque figures
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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.