HVAC Module - Dual Automatic Temperature Control (DATC) DTC Chart
NOTE:
Some PCM DTCs may inhibit A/C operation. If any PCM DTCs are retrieved, diagnose those first. Refer to the Introduction - Gasoline Engines
article.
HVAC MODULE - DUAL AUTOMATIC TEMPERATURE CONTROL DTC CHART
| DTC | Description | Action to Take |
|---|---|---|
| B1251 | Air Temperature Internal Sensor Circuit Open | Go to Pinpoint Test A . |
| B1253 | Air Temperature Internal Sensor Circuit Short to Ground | Go to Pinpoint Test A . |
| B1255 | Air Temperature External Sensor Circuit Open | Go to Pinpoint Test B . |
| B1257 | Air Temperature External Sensor Circuit Short to Ground | Go to Pinpoint Test B . |
| B1317 | Battery Voltage High | CLEAR the DTCs. REPEAT the self-test. If the DTC returns and the DTC is not present in other modules, MEASURE the voltage between ground and: HVAC module - dual automatic temperature control (DATC) C228a-12, circuit CBP37 (WH) and HVAC module - DATC C228a-13, circuit SBP15 (WH/RD).
If the DTC returns and the DTC is present in other modules, REFER to CHARGING SYSTEM - GENERAL INFORMATION article. |
| B1318 | Battery Voltage Low | Go to Pinpoint Test G . |
| B1342 | ECU is Faulted | CLEAR the DTCs. REPEAT the self-test. If the DTC returns, INSTALL a new HVAC module - DATC. REFER to CLIMATE CONTROL article. |
| B1947 | Climate Control A/C Post Evaporator Sensor Circuit Short to Ground | Go to Pinpoint Test D . |
| B2014 | Climate Control A/C Post Evaporator Sensor Open Circuit | Go to Pinpoint Test D . |
| B226C | Left Blend Door Motor Stall | Go to Pinpoint Test F . |
| B226D | Right Blend Door Motor Stall | Go to Pinpoint Test F . |
| B226E | Mode Blend Door Motor Stall | Go to Pinpoint Test F . |
| B2426 | Passenger Solar Radiation Sensor Circuit Open | Go to Pinpoint Test C . |
| B2427 | Passenger Solar Radiation Sensor Circuit Short to Ground | Go to Pinpoint Test C . |
| B2795 | Driver Solar Radiation Sensor Circuit Short to Ground | Go to Pinpoint Test C . |
| B2796 | Driver Solar Radiation Sensor Circuit Open | Go to Pinpoint Test C . |
| B295A | Driver Blend Door Potentiometer Feedback Circuit Open | Go to Pinpoint Test F . |
| B295B | Driver Blend Door Potentiometer Feedback Circuit Short to Ground | Go to Pinpoint Test F . |
| B295C | Passenger Blend Door Potentiometer Feedback Circuit Open | Go to Pinpoint Test F . |
| B295D | Passenger Blend Door Potentiometer Feedback Circuit Short to Ground | Go to Pinpoint Test F . |
| B295E | Mode Door Potentiometer Feedback Circuit Open | Go to Pinpoint Test F . |
| B295F | Mode Door Potentiometer Feedback Circuit Short to Ground | Go to Pinpoint Test F . |
| U0073 | Control Module Communication Bus A Off | CLEAR the DTCs. REPEAT the self-test. If the DTC returns, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the network concern. |
| U0140 | Lost Communication With Body Control Module (GEM) | CLEAR The DTCs. REPEAT the self-test. If the DTC returns, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the lost communication with the smart junction box (SJB). |
| U0155 | Lost Communication With Instrument Panel Cluster Control Module | CLEAR The DTCs. REPEAT the self-test. If the DTC returns, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the lost communication with the instrument panel cluster. |
| U0246 | Lost Communication With Seat Control Module (DCSM) | CLEAR The DTCs. REPEAT the self-test. If the DTC returns, REFER to MODULE COMMUNICATIONS NETWORK article to diagnose the lost communication with the heated seat module. |
| U2050 | No Application Present | REFLASH the HVAC module - DATC. REFER to MODULE CONFIGURATION article. If the DTC returns, INSTALL a new HVAC module - DATC. REFER to CLIMATE CONTROL article. |
| U2051 | One or More Calibration Files Missing/Corrupt | REFLASH the HVAC module - DATC. REFER to MODULE CONFIGURATION article. If the DTC returns, INSTALL a new HVAC module - DATC. REFER to CLIMATE CONTROL article. |