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Nissan Armada 2025-2026 Service and Repair Manual: Symptom Table

Symptom Possible causeInspection item
All function does not operate
  • Fuse
  • Front seat pneumatic control unit power supply/ground circuit
Check power supply and ground circuit (front seat pneumatic control unit)
  • Driver seat pneumatic control unit: Refer to Diagnosis Procedure.
  • Passenger seat pneumatic control unit: Refer to Diagnosis Procedure.
Tube bending, cracking, and incomplete connection (between front seat air pump and front seat pneumatic control unit)Check lumbar support mechanism
  • Front seat air pump
  • Front seat pneumatic control unit

Replace front seat lumbar support unit

Refer to Removal and Installation.
Manual function does not operateLumbar support switch operationLumbar support manual function does not operate
  • Tube bending, cracking, and incomplete connection (between front seat pneumatic control unit and air bags)
  • Cracking of the air bags.
Check lumbar support mechanism
  • Lumbar support switch signal circuit
  • Lumbar support switch
  • Front seat pneumatic control unit

Check lumbar support switch

Refer to Component Function Check.
Only the display unit operation does not operateCheck AV system
  • Front seat pneumatic control unit LIN signal circuit
  • Front seat pneumatic control unit
  • Front seat control unit

Check front seat pneumatic control unit LIN communication

Refer to Diagnosis Procedure.
Massage function does not operateMassage switch operation does not operateCheck lumbar support manual function does it operate normally
  • Massage switch signal circuit
  • Massage switch
  • Front seat control unit

Check massage switch

Refer to Component Function Check.
Only the display unit operation does not operateCheck lumbar support manual function does it operate normally
Check AV system
4 Way Lumbar Support System
...

Third Power Seat System
...

Other materials:

Diagnosis Procedure
Fuel gauge will not indicate from a certain position. CONDUCTING THE COMBINATION METER SELF-DIAGNOSIS MODE Perform the self-diagnosis mode of combination meter, and then check that the fuel gauge operates normally. Refer to On Board Diagnosis Function. Is the inspection result normal? YES>> ...

Welded Panel Replacement Procedure
NOTE: When welding and dressing the parts, cover up holes of these parts with tape to prevent debris from entering. Assembly panel replacement or partial panel replacement Assembly panel replacement means replacement of a complete panel by cutting all the welded portions. Partial panel replacement ...

Removal and Installation
REMOVAL Fully open front door. Apply a protective tape (A) on the parts to protect it from damage. Disengage fixing clips using a remover tool (A). : Clip Cut double-sided tape using a remover tool and cutter. CAUTION: Remove double-sided tape remaining on body side panel with a double-side ...

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