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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

    Diagnosis and Repair Work Flow
    Work Flow DETAILED FLOWINTERVIEW FROM THE CUSTOMER CAUTION: Customers are not professional. Never guess easily like “maybe the customer means that...,” or “maybe the customer mentions this symptom”. >> GO TO 2. CHECK SYMPTOM Reproduce the symptom that is indicated by the customer, b ...

    Front Foot Lamp
    Exploded View Front Foot Lamp (LH) Steering member assembly Front foot lamp bracket (LH) Front foot lamp (LH) : Pawl : vehicle front Front Foot Lamp (RH) Front foot lamp (RH) Front foot lamp bracket (RH) Passenger knee air bag module : Pawl : vehicle front Front ...

    Mac Key Writing
    Description When replacing BCM, it is necessary to write MAC key to BCM. Write MAC key to BCM according to "MAC Key writing" procedure of "CONSULT Operation Manual". Refer to Work Procedure.CAUTION: During MAC key writing, maintain the following conditions: Ignition switch ON CONSULT is connecte ...