Inspection Procedure (No. 1 Seat Warmer Function Is Inoperative): 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. 1	Seat warmer function is inoperative
DETECTION	Seat warmer does not warm seat even though seat warmer switch is on
POSSIBLE CAUSE	The power supply is not supplied to filament of seat warmer Open circuit in seat warmer control unit power supply circuit: Seat warmer control unit terminal O-Battery positive terminal Seat warmer control unit terminal M-Battery positive terminal SEAT WARM 20 A fuse malfunction (Fuse to melt away or broken): Seat warmer control unit terminal O-Battery positive terminal (fuse to melt away) Seat warmer control unit terminal M-Battery positive terminal (fuse to melt away) Poor connect the connector: Driver-side seat warmer unit connector-Seat warmer control unit connector Passenger-side seat warmer unit connector-Seat warmer control unit connector Open circuit in wiring harness between the following terminal: Driver-side seat warmer unit terminal P-Driver-side seat warmer unit terminal A Passenger-side seat warmer unit terminal N-Passenger-side seat warmer unit terminal B Seat warmer control unit not operation Open circuit or short to ground in wiring harness between the following terminal: Front body control module (FBCM) terminal 1C-Seat warmer control unit terminal K Seat warmer control unit terminal H-Body ground Seat warmer control unit terminal G-Body ground Seat warmer unit cannot control filament on Seat warmer control malfunction Seat warmer filament does not generate heat Driver-side seat warmer unit (seat cushion side) malfunction Driver-side seat warmer unit (seat back side) malfunction Passenger-side seat warmer unit (seat cushion side) malfunction Passenger-side seat warmer unit (seat back side) malfunction Seat warmer control unit cannot receive operation signal Seat warmer control unit malfunction Open circuit or short to ground in wiring harness between the following terminal: Seat warmer control unit terminal I-Climate control unit terminal 1E (with full-auto air conditioner) Seat warmer control unit terminal I-Indicator unit terminal D (with manual air conditioner)