DTC Troubleshooting Index
Checking the DTCs by HDS
DTC TROUBLESHOOTING CHART
| DTC | Detection Item or Symptom | ECU | DTC type | reference |
|---|---|---|---|---|
| B1200 | Communication bus line error | HVAC control unit | Loss of communication | (see DTC B1050: COMMUNICATION BUS LINE ERROR; DTC B1100: COMMUNICATION BUS LINE ERROR; DTC B1150: COMMUNICATION BUS LINE ERROR; DTC B1200: COMMUNICATION BUS LINE ERROR; DTC B1250: COMMUNICATION BUS LINE ERROR; DTC B1750: COMMUNICATION BUS LINE ERROR ) |
| B1202 | HVAC control unit internal error | HVAC control unit | Internal error | (see DTC TROUBLESHOOTING ) |
| B1205 | HVAC control unit lost communication with gauge control module (VSP/NE message) | HVAC control unit | Loss of communication | (see DTC TROUBLESHOOTING ) |
| B1206 | HVAC control unit lost communication with gauge control module (ECT message) | HVAC control unit | Loss of communication | (see DTC TROUBLESHOOTING ) |
| B1207 | HVAC control unit lost communication with gauge control module (ILLUME message) | HVAC control unit | Loss of communication | (see DTC TROUBLESHOOTING ) |
| B1227 | An open in the outside air temperature sensor circuit | HVAC control unit | Signal error | (see DTC B1227 OR DTC INDICATOR 9: AN OPEN IN THE OUTSIDE AIR TEMPERATURE SENSOR CIRCUIT ) |
| B1228 | A short in the outside air temperature sensor circuit | HVAC control unit | Signal error | (see DTC B1228 OR DTC INDICATOR 10: A SHORT IN THE OUTSIDE AIR TEMPERATURE SENSOR CIRCUIT ) |
| B1231 | An open in the evaporator temperature sensor circuit | HVAC control unit | Signal error | (see DTC B1231 OR DTC INDICATOR 7: AN OPEN IN THE EVAPORATOR TEMPERATURE SENSOR CIRCUIT ) |
| B1232 | A short in the evaporator temperature sensor circuit | HVAC control unit | Signal error | (see DTC B1232 OR DTC INDICATOR 8: A SHORT IN THE EVAPORATOR TEMPERATURE SENSOR CIRCUIT ) |
| B1233 | An open in the air mix control motor circuit | HVAC control unit | Signal error | (see DTC B1233 OR DTC INDICATOR 1: AN OPEN IN THE AIR MIX CONTROL MOTOR CIRCUIT ) |
| B1234 | A short in the air mix control motor circuit | HVAC control unit | Signal error | (see DTC B1234 OR DTC INDICATOR 2: A SHORT IN THE AIR MIX CONTROL MOTOR CIRCUIT ) |
| B1235 | A problem in the air mix control linkage, door, or motor | HVAC control unit | Signal error | (see DTC B1235 OR DTC INDICATOR 3: A PROBLEM IN THE AIR MIX CONTROL LINKAGE, DOOR, OR MOTOR ) |
| B1239 | An open or short in the mode control motor circuit | HVAC control unit | Signal error | (see DTC B1239 OR DTC INDICATOR 4: AN OPEN OR SHORT IN THE MODE CONTROL MOTOR CIRCUIT ) |
| B1240 | A problem in the mode control linkage, doors, or motor | HVAC control unit | Signal error | (see DTC B1240 OR DTC INDICATOR 5: A PROBLEM IN THE MODE CONTROL LINKAGE, DOORS, OR MOTOR ) |
| B1241 | A problem in the blower motor circuit | HVAC control unit | Signal error | (see DTC B1241 OR DTC INDICATOR 6: A PROBLEM IN THE BLOWER MOTOR CIRCUIT ) |