Removing and installing control unit for seat ventilation J799 / J800 (seat heating integrated) — AUDI

🧭 Before you start

Fits: Audi A4 B8 (8K, 2007–2015)

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• Make sure seat adjustment control unit with memory function engages audibly in retainer.Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.
• If the airbag warning lamp K75 indicates a fault following installation, you must interrogate, erase and then re-interrogate the event memory .

📋 Procedure

1. ⚠ Observe safety regulations for pyrotechnic components .Before handling pyrotechnic components (e.g. unplugging the electrical connector) the mechanic must discharge any static electricity. This can be done by briefly touching the door striker plate, or similar. — Switch on ignition.
2. With ignition switched on, disconnect battery earth wire Electrical system27Battery; Disconnecting and connecting battery.
3. Remove front seat:
4. Attach front seat to seat repair standVAS 6136.
5. Press release mechanism (arrow) and unplug electrical connector (2) at control unit for seat ventilation J799 / J800(item 1).

6. Use removal wedge3409 to release retaining tab (arrow 1).
7. Swivel control unit downwards (arrow 2).
8. Disengage hook (arrow 3) of control unit at retainer.
9. Detach control unit. [Note: Make sure seat adjustment control unit with memory function engages audibly in retainer.Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.]
10. ⚠ The battery must be connected with the ignition switched on. If pyrotechnic components (e.g. airbag or belt tensioner) are inexpertly repaired, this may result in unwanted triggering after connecting the battery. There must not be anyone in the vehicle while you are connecting the battery. — With ignition switched on, connect battery earth wire Electrical system27Battery; Disconnecting and connecting battery. [Note: If the airbag warning lamp K75 indicates a fault following installation, you must interrogate, erase and then re-interrogate the event memory .]

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