Climate Control System DTC Troubleshooting Index
DTC
Detection Item or Symptom
ECU
DTC Type
Climate control unit LIN communication bus line error
Climate control unit
Loss of communication
An open in the mode control motor circuit
Climate control unit
Signal error
A short in the mode control motor circuit
Climate control unit
Signal error
A short in the recirculation control motor circuit
Climate control unit
Signal error
An open in the in-car temperature sensor circuit
Climate control unit
Signal error
A short in the in-car temperature sensor circuit
Climate control unit
Signal error
An open in the outside air temperature sensor circuit
Climate control unit
Signal error
A short in the outside air temperature sensor circuit
Climate control unit
Signal error
An open in the evaporator temperature sensor circuit
Climate control unit
Signal error
A short in the evaporator temperature sensor circuit
Climate control unit
Signal error
An open in the air mix control motor circuit (driver's)
Climate control unit
Signal error
A short in the air mix control motor circuit (driver's)
Climate control unit
Signal error
A problem in the air mix control motor circuit, linkage, door, or motor (driver's)
Climate control unit
Signal error
An open in the passenger's air mix control motor circuit
Climate control unit
Signal error
A short in the passenger's air mix control motor circuit
Climate control unit
Signal error
A problem in the passenger's air mix control motor circuit, linkage, door, or motor
Climate control unit
Signal error
Automatic lighting control unit/sunlight sensor error
Climate control unit
Signal error
A problem in the mode control motor circuit, linkage, door, or motor
Climate control unit
Signal error
A problem in the blower motor circuit
Climate control unit
Signal error
Climate control unit lost communication with front panel (climate control panel)
Climate control unit
Loss of communication
A problem in the recirculation control motor circuit, linkage, door, or motor
Climate control unit
Signal error
An open in the recirculation control motor circuit
Climate control unit
Signal error
A problem in the A/C compressor variable capacity control solenoid circuit
Climate control unit
Signal error
Communication bus line error (BUS-OFF)
Climate control unit
Loss of communication
Climate control unit lost communication with MICU (body control module)
Climate control unit
Loss of communication
Climate control unit lost communication with gauge control module
Climate control unit
Loss of communication
Climate control unit lost communication with seat heater control unit (front)
Climate control unit
Loss of communication
*1: With A/C
*2: With dual zone climate control
*3: With seat heater