DTC B1C1A-12; B1C1A-13; B1C1B-12; B1C1B-13; Driver-Side And Passenger-Side Air Mix Actuator (Potentiometer) Circuit Short To Power Supply Or Circuit Open: Notes
DTC DETECTION DESCRIPTION
| 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
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| Detection condition |
- Malfunction in wiring harness between air mix actuator and climate control unit
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| Fail-safe function |
Malfunction determined when ignition switched ON
- Air mix actuator drive signal is stopped right after the malfunction is determined.
- However, fixed at MAX COLD when set temperature is at 15.0 °C (60 °F) and fixed at MAX HOT when set temperature is at 32.0 °C (90 °F)
Malfunction already exists when ignition switched ON
- Control based on ambient temperature.
- However, fixed at MAX COLD when set temperature is at 15.0 °C (60 °F) and fixed at MAX HOT when set temperature is at 32.0 °C (90 °F)
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| Possible cause |
- Connector or terminal malfunction
- Air mix actuator malfunction
- Open circuit in wiring harness between the following terminals: Driver-side
- Climate control unit terminal 1C-Air mix actuator terminal G
- Climate control unit terminal 2K-Air mix actuator terminal F
- Climate control unit terminal 1Q-Air mix actuator terminal E
Passenger-side
- Climate control unit terminal 1C-Air mix actuator terminal E
- Climate control unit terminal 2I-Air mix actuator terminal F
- Climate control unit terminal 1Q-Air mix actuator terminal G
- Short to power supply in wiring harness between the following terminals:
Driver-side
- Climate control unit terminal 1C-Air mix actuator terminal G
- Climate control unit terminal 2K-Air mix actuator terminal F
- Climate control unit terminal 1Q-Air mix actuator terminal E
Passenger-side
- Climate control unit terminal 1C-Air mix actuator terminal E
- Climate control unit terminal 2I-Air mix actuator terminal F
- Climate control unit terminal 1Q-Air mix actuator terminal G
- Climate control unit malfunction
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