| Description |
The second-row seat warmer does not warm up even if the second-row seat warmer switch is turned on. |
| Possible Causes |
- Second-row seat warmer switch malfunction
- Second-row seat warmer control unit power supply circuit malfunction
- Short to ground in wiring harness between R SEAT WARM 20 A fuse and second-row seat warmer control unit terminal O
- Short to ground in wiring harness between R SEAT WARM 20 A fuse and second-row seat warmer control unit terminal M
- Open circuit in wiring harness between R SEAT WARM 20 A fuse and second-row seat warmer control unit terminal O
- Open circuit in wiring harness between R SEAT WARM 20 A fuse and second-row seat warmer control unit terminal M
- R SEAT WARM 20 A fuse malfunction
- Short to ground in wiring harness between front body control module (FBCM) terminal 1C and second-row seat warmer control unit terminal A
- Open circuit in wiring harness between front body control module (FBCM) terminal 1C and second-row seat warmer control unit terminal A
- Open circuit in wiring harness between the following terminals:
- Second-row seat warmer control unit terminal L and body ground
- Malfunction in wiring harness between second-row seat warmer control unit terminal J and rear climate control unit terminal T
- Short to ground in wiring harness between second-row seat warmer control unit terminal J and rear climate control unit terminal T
- Open circuit in wiring harness between second-row seat warmer control unit terminal J and rear climate control unit terminal T
- Rear climate control unit malfunction
- Second-row seat warmer unit malfunction
- Second-row seat warmer control unit malfunction
- Connector poor contact or terminal damage
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 Courtesy of MAZDA MOTORS CORP.
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