DTC B1C1A-12: B1C1A-13: B1C1B-12: B1C1B-13: Air Mix Actuator (Potentiometer) Circuit: 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.

System malfunction location	B1C1A:12: Driver-side air mix actuator (potentiometer) circuit short to power supply B1C1A:13: Driver-side air mix actuator (potentiometer) circuit open B1C1B:12: Passenger-side air mix actuator (potentiometer) circuit short to power supply B1C1B:13: Passenger-side air mix actuator (potentiometer) circuit open
Detection condition	Malfunction in wiring harness between air mix actuator and climate control unit
Fail-safe	Malfunction determined when IG SW at ON Air mix actuator drive signal is stopped right when the malfunction is determined. Malfunction already exists when IG SW turned to ON Control based on ambient temperature.
Possible cause	Connector or terminal malfunction Air mix actuator malfunction Open circuit in wiring harness between climate control unit and air mix actuator Short to power supply in wiring harness between climate control unit and air mix actuator Climate control unit malfunction