| Description |
The front seat warmer does not warm up even if the front seat warmer switch is turned on. |
| Possible Causes |
- Front seat warmer switch malfunction
- Front seat warmer control unit power supply circuit malfunction
- Short to ground in wiring harness between SEAT WARM 20 A fuse and front seat warmer control unit terminal O
- Short to ground in wiring harness between SEAT WARM 20 A fuse and front seat warmer control unit terminal M
- Open circuit in wiring harness between SEAT WARM 20 A fuse and front seat warmer control unit terminal O
- Open circuit in wiring harness between SEAT WARM 20 A fuse and front seat warmer control unit terminal M
- SEAT WARM 20 A fuse malfunction
- Short to ground in wiring harness between front body control module (FBCM) terminal 1C and front seat warmer control unit terminal K
- Open circuit in wiring harness between front body control module (FBCM) terminal 1C and front seat warmer control unit terminal K
- Open circuit in wiring harness between the following terminals:
- Front seat warmer control unit terminal G and body ground
- Front seat warmer control unit terminal H and body ground
- Malfunction in wiring harness between front seat warmer control unit terminal I and indicator unit terminal D
- Short to ground in wiring harness between front seat warmer control unit terminal I and indicator unit terminal D
- Open circuit in wiring harness between front seat warmer control unit terminal I and indicator unit terminal D
- Indicator unit malfunction
- Front seat warmer unit malfunction
- Front seat warmer control unit malfunction
- Connector poor contact or terminal damage
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 Courtesy of MAZDA MOTORS CORP.
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