| Description |
Heated steering wheel does not warm steering wheel even though heated steering wheel switch is on |
| Possible Causes |
The power supply is not supplied to filament of heated steering wheel
- Open circuit in heated steering wheel control unit power supply circuit:
- Heated steering wheel control unit terminal D and battery positive terminal
- IG1 relay malfunction
- ST.HEATER2 20 A fuse malfunction (Blown fuse):
- Short to ground in wiring harness between IG1 relay and clock spring connector 6A
- Short to ground in wiring harness between clock spring connector 6 terminal 7A and heated steering wheel control unit terminal D.
- Clock spring malfunction
- Poor connect the connector:
- Clock spring connector and heated steering wheel control unit connector Heated steering wheel control unit not operation
- Open circuit in wiring harness between the following terminal:
- Heated steering wheel control unit terminal A and body ground
- Clock spring malfunction:
- Open circuit in wiring harness between clock spring connector 6B and 7B Heated steering wheel unit cannot control filament on
- Heated steering wheel unit malfunction
Heated steering wheel filament does not generate heat
- Heated steering wheel unit malfunction
Heated steering wheel control unit cannot receive operation signal
- Heated steering wheel control unit malfunction
- Open circuit or short to ground in wiring harness between the following terminal:
- Heated steering wheel control unit terminal C and indicator unit terminal I
- Clock spring malfunction:
- Open circuit in wiring harness between clock spring connector 6D and 7D
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 Courtesy of MAZDA MOTORS CORP.
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