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Nissan Armada 2025-2026 Service and Repair Manual: 4 Way Lumbar Support System

Nissan Armada 2025-2026 Service and Repair Manual / Body Interior / Seat / 4 Way Lumbar Support System

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 operate Lumbar support switch operation Lumbar 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 operate Check 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 operate Massage switch operation does not operate Check 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 operate Check lumbar support manual function does it operate normally
Check AV system
    Other materials

    A/t Fluid Cooler
    Cleaning Whenever an A/T is replaced, the A/T fluid cooler mounted in the radiator must be inspected and cleaned.Metal debris and friction material, if present, can become trapped in the A/T fluid cooler. This debris can contaminate the newly serviced A/T or, in severe cases, can block or restrict t ...

    Advanced Ambient Light (rear Door Upper)
    Exploded View Advanced ambient light (rear door upper) is integrated structure with rear door finisher. For exploded view of rear door finisher, refer to Exploded View. Replacement CAUTION: Disconnect the battery negative terminal or remove power circuit fuse when performing the operation for prev ...

    Power Outlet. Power Socket
    Precautions Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT PRE-TENSIONER" The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along with a front seat belt, helps to reduce the risk or severity of injury to the driver and front ...