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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Seats) >> Seat Warmer Control Unit Inspection >> Inspection Procedure (No. 3 Temperature Of Seat Warmer Cannot Be Adjusted) >> Notes

Inspection Procedure (No. 3 Temperature Of Seat Warmer Cannot Be Adjusted): Notes

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
No. 3 Temperature of seat warmer cannot be adjusted
DETECTION 
  • Seat warmer does not adjust temperature even though seat warmer Lo/Mid/Hi switch is switched between low and high
  • Seat warmer temperature continues to rise
POSSIBLE CAUSE  Seat warmer switch does not Low/Mid/Hi switched 
  • Seat warmer switch malfunction

    Seat warmer control unit falsely detects always seat warmer switch to Low, Mid or Hi 

  • Seat warmer control unit malfunction
  • Short to ground in wiring harness between the following terminal:
    • Seat warmer control unit terminal I-Climate control unit terminal 1E
    • Seat warmer control unit terminal I-Indicator unit terminal D

    Seat warmer control unit cannot control seat warmer unit 

  • Seat warmer control unit malfunction
  • Thermostat (Built-in seat warmer unit) malfunction
  • Short to ground circuit in wiring harness between the following terminal:
    • Driver-side seat warmer unit-Seat warmer control unit terminal C
    • Passenger-side seat warmer unit-Seat warmer control unit terminal D