Heated Steering Wheel System Operates Constantly: Notes

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

HEATED STEERING WHEEL SYSTEM OPERATES CONSTANTLY [HEATED STEERING WHEEL] DESCRIPTION AND POSSIBLE CAUSE

Troubleshooting item	Heated steering wheel system operates constantly
Description	Heated steering wheel warms steering wheel even though heated steering wheel switch is off
Possible causes	Heated steering wheel switch is always ON Heated steering wheel switch malfunction Climate control unit malfunction Heated steering wheel control unit falsely detects heated steering wheel switch is ON Heated steering wheel control unit malfunction Clock spring malfunction Open circuit in heated steering wheel control unit control circuit Short to ground in heated steering wheel control unit control circuit Short to power supply in heated steering wheel control unit control circuit Open circuit in clock spring control circuit Short to ground in clock spring control circuit Short to power supply in clock spring control circuit Dash-electrical supply unit malfunction CAN communication line malfunction
Courtesy of MAZDA MOTORS CORP.