HVAC System DTCS
| DTC | Detection Item or Symptom | ECU | DTC Type |
|---|---|---|---|
| B120A | Climate Control Unit LIN Communication Bus Line Error | Climate control unit | Loss of communication |
| B121A | An open in the mode control motor circuit | Climate control unit | Signal error |
| B121B | A short in the mode control motor circuit | Climate control unit | Signal error |
| B121D | Humidity/in-car temperature sensor communication error | Climate control unit | Loss of communication |
| B1220 | A Short in the recirculation control motor circuit | Climate control unit | Signal error |
| B1227 | An open in the outside air temperature sensor circuit | Climate control unit | Signal error |
| B1228 | A short in the outside air temperature sensor circuit | Climate control unit | Signal error |
| B1231 | An open in the evaporator temperature sensor circuit | Climate control unit | Signal error |
| B1232 | A short in the evaporator temperature sensor circuit | Climate control unit | Signal error |
| B1233 | An open in the air mix control motor circuit (driver's) | Climate control unit | Signal error |
| B1234 | A short in the air mix control motor circuit (driver's) | Climate control unit | Signal error |
| B1235 | A problem in the air mix control motor circuit, linkage, door, or motor (driver's) | Climate control unit | Signal error |
| B1236*1 | An open in the passenger's air mix control motor circuit | Climate control unit | Signal error |
| B1237*1 | A short in the passenger's air mix control motor circuit | Climate control unit | Signal error |
| B1238*1 | A problem in the passenger's air mix control motor circuit, linkage, door, or motor | Climate control unit | Signal error |
| B123F | Automatic lighting control unit/sunlight sensor error | Climate control unit | Signal error |
| B1240 | A problem in the mode control motor circuit, linkage, door, or motor | Climate control unit | Signal error |
| B1241 | A problem in the blower motor circuit | Climate control unit | Signal error |
| B2964 | Climate control unit lost communication with Front PANEL (Climate Control Panel) | Climate control unit | Loss of communication |
| B296D | Electric heater coolant Pump Communication Fail | Climate control unit | Loss of communication |
| B296E | Electric heater coolant Pump Fail | Climate control unit | Signal error |
| B2983 | A problem in the recirculation control motor circuit, linkage, door, or motor | Climate control unit | Signal error |
| B2986 | An open in the recirculation control motor circuit | Climate control unit | Signal error |
| B2990 | A problem in the A/C compressor driving circuit (A Problem in the Electric A/C Compressor Driving Circuit) | Climate control unit | Signal error |
| B2998 | A problem in the A/C compressor driver (A Problem in the Electric A/C Compressor Driver) | Climate control unit | Signal error |
| U1280 | Communication bus line error (BUS-OFF) | Climate control unit | Loss of communication |
| U1281 | Climate Control Unit Lost Communication with MICU (body control module) | Climate control unit | Loss of communication |
| U128D | Climate Control Unit Lost communication with gauge control module | Climate control unit | Loss of communication |
| U1290*2 | Climate Control Unit Lost Communication With Seat Heater Control Unit (Front) | Climate control unit | Loss of communication |
*1: With dual zone climate control
*2: With seat heater