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

🧭 Before you start

Fits: Audi Q7 (4L, 2005–2015)

Don't miss

• Make sure control unit 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. — Move seat to service position .
2. Switch on ignition.
3. With ignition switched on, disconnect battery earth wire Electrical system27.
4. Press release mechanism and unplug electrical connectors (1, 2, 3).
5. Detach connectors from bracket; to do so, release retaining hooks and pull out connectors.

6. Release retaining hooks (5 and 6) and pull bracket (4) for connectors off bracket for trim (arrow).
7. Press release mechanism and unplug electrical connector (2) at control unit for seat ventilation J799 / J800(item 1).
8. Use removal wedge3409 to release retaining tab in direction of (arrow A).
9. Swivel control unit out of bracket (arrow B).
10. Disengage retaining tab (8) of control unit at bracket.
11. Detach control unit.
12. Unclip electrical connector (3) from bracket.
13. Unclip wire retainers (4, 5) from brackets and detach brackets (6, 7). [Note: Make sure control unit engages audibly in retainer.Make sure electrical connectors are fitted correctly (as far as stop) and engage audibly.]
14. ⚠ 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. — Switch on ignition.
15. With ignition switched on, connect battery earth wire Electrical system27.
16. 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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