Symptom
Electric seat not adjusting
A powered seat stops moving in one direction, in all of them, or forgets its stored positions. Worth knowing before anything is dismantled: the seat is one of the few places where a module, motors and often the airbag occupant sensing all share the same loom, and that loom runs under the seat where feet, luggage and vacuum cleaners reach it. A seat fault arriving at the same time as an airbag warning is usually one damaged connector rather than two problems. Note whether the memory buttons still work, which separates the switches from the motors.
Also described as: electric seat not working, seat wont move, power seat stuck, seat memory not working, seat adjustment not working, صندلی برقی تنظیم نمیشود, صندلی برقی حرکت نمیکند, asiento electrico no se mueve, no puedo regular asiento, butaca electrica no funciona, الكرسي الكهربائي لا يتحرك, لا أستطيع تعديل المقعد, مقعد السائق معطل
What this usually means
Worth knowing before anything is dismantled: the seat is one of the few places where a module, motors and often the airbag occupant sensing all share the same loom, and that loom runs under the seat where feet, luggage and vacuum cleaners reach it.
A seat fault arriving at the same time as an airbag warning is usually one damaged connector rather than two problems — and that connection is the most valuable thing in this entry, because the airbag warning would otherwise be diagnosed separately and expensively.
Note whether the memory buttons still work, which separates the switches from the motors. Memory recall that moves the seat proves the motors and their drivers; switches that do nothing while memory works isolates the fault to the switch pack. The reverse — switches working, memory not — points at the module or its stored positions.
A seat that moves in some directions and not others points at individual motors or their drivers rather than at supply, because they share a feed. A seat that does nothing at all is supply, the module, or the connector under the seat.
Do not work on a seat connector with the battery connected. Airbag circuits run through the same area on many vehicles, and disturbing them live can deploy a side or seat airbag. Disconnect the battery and allow the reserve to discharge first.
And a seat that has jammed against something is common — a bottle, a phone, or a child's toy in the rails will stall a motor, and several systems then latch a fault that needs clearing rather than a part.
Working through it
| What you find | Likely cause | How to confirm it | What fixes it |
|---|---|---|---|
| Seat fault with an airbag warning lamp | One damaged connector under the seat — the loom is shared | Inspect the under-seat connectors with the battery disconnected and the reserve discharged. Read airbag codes. | Repair the connector. Diagnosing the airbag warning separately is the expensive mistake this entry exists to prevent. |
| Memory recall works, switches do nothing | The switch pack — the motors and their drivers are proven by the recall | This test isolates it outright and needs no tools. | Renew or clean the switch pack. |
| Switches work, memory does not | The module or its stored positions rather than the motors | Try storing a new position. Failure to store points at the module. | Repair the module, or re-store the positions where they were simply lost. |
| Moves in some directions and not others | Individual motors or their drivers — they share a feed, so supply is unlikely | Test each direction. Partial function rules out the common supply. | Renew the failed motor or the module's output stage. |
| Nothing at all, no sound | Supply, the module, or the connector under the seat | Check the seat's fuse and supply at the connector, battery disconnected before handling. | Replace the fuse or repair the connector and find why it failed. |
| Stopped after something was caught in the rails | A stalled motor and a latched fault rather than damage | Look in the rails. A bottle or a toy is a common and complete explanation. | Remove the obstruction and clear the fault. A part is often not needed. |
-
Seat fault with an airbag warning lamp
- Likely cause
- One damaged connector under the seat — the loom is shared
- How to confirm it
- Inspect the under-seat connectors with the battery disconnected and the reserve discharged. Read airbag codes.
- What fixes it
- Repair the connector. Diagnosing the airbag warning separately is the expensive mistake this entry exists to prevent.
-
Memory recall works, switches do nothing
- Likely cause
- The switch pack — the motors and their drivers are proven by the recall
- How to confirm it
- This test isolates it outright and needs no tools.
- What fixes it
- Renew or clean the switch pack.
-
Switches work, memory does not
- Likely cause
- The module or its stored positions rather than the motors
- How to confirm it
- Try storing a new position. Failure to store points at the module.
- What fixes it
- Repair the module, or re-store the positions where they were simply lost.
-
Moves in some directions and not others
- Likely cause
- Individual motors or their drivers — they share a feed, so supply is unlikely
- How to confirm it
- Test each direction. Partial function rules out the common supply.
- What fixes it
- Renew the failed motor or the module's output stage.
-
Nothing at all, no sound
- Likely cause
- Supply, the module, or the connector under the seat
- How to confirm it
- Check the seat's fuse and supply at the connector, battery disconnected before handling.
- What fixes it
- Replace the fuse or repair the connector and find why it failed.
-
Stopped after something was caught in the rails
- Likely cause
- A stalled motor and a latched fault rather than damage
- How to confirm it
- Look in the rails. A bottle or a toy is a common and complete explanation.
- What fixes it
- Remove the obstruction and clear the fault. A part is often not needed.
Codes that produce this symptom (13)
Listed with the codes that most typically present this way first — the likeliest place to start.
- U0208 Lost Communication With Seat Control Module A Typical of this code Moderate
- U0209 Lost Communication With Seat Control Module B Typical of this code Moderate
- U0210 Lost Communication With Seat Control Module C Typical of this code Low
- U0211 Lost Communication With Seat Control Module D Typical of this code Low
- U0246 Lost Communication With Seat Control Module E Typical of this code Low
- U0247 Lost Communication With Seat Control Module F Typical of this code Low
- U0278 Lost Communication With Seat Control Module L Typical of this code Low
- U0509 Invalid Data Received From Seat Control Module A Typical of this code Low
- U050A Invalid Data Received From Seat Control Module B Typical of this code Low
- U0511 Invalid Data Received From Seat Control Module C Typical of this code Low
- U0512 Invalid Data Received From Seat Control Module D Typical of this code Low
- U0547 Invalid Data Received From Seat Control Module E Typical of this code Low
- U0548 Invalid Data Received From Seat Control Module F Typical of this code Low
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
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