HVAC Module
HVAC MODULE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description | Action to take |
|---|---|---|
| B1200 | Climate Control Pushbutton Circuit Failure | INSTALL a new HVAC module. REFER to CLIMATE CONTROL article. |
| B1242 | Air Flow Recirculation Door Driver Circuit Failure | Go to Pinpoint Test K . |
| B1251 | Air Temperature Internal Sensor Circuit Open | Go to Pinpoint Test D . |
| B1253 | Air Temperature Internal Sensor Circuit Short to Ground | Go to Pinpoint Test D . |
| B1255 | Air Temperature External Sensor Circuit Open | Go to Pinpoint Test E . |
| B1257 | Air Temperature External Sensor Circuit Short to Ground | Go to Pinpoint Test E . |
| B1259 | Solar Radiation Sensor Circuit Open | Go to Pinpoint Test F . |
| B1261 | Solar Radiation Sensor Circuit Short to Ground | Go to Pinpoint Test F . |
| B1263 | Servo Motor Vent Circuit Failure | Go to Pinpoint Test L . |
| B1264 | Servo Motor Foot Circuit Failure | Go to Pinpoint Test L . |
| B1342 | ECU is Faulted | Button held too long may set DTC. ATTEMPT to clean buttons. If code returns, INSTALL a new HVAC module. REFER to CLIMATE CONTROL article. |
| B1676 | Battery Pack Voltage Out of Range | Go to Pinpoint Test H . |
| B2266 | Left Side Blend Door Circuit Failure | Go to Pinpoint Test C . |
| B2267 | Right Side Blend Door Circuit Failure | Go to Pinpoint Test C . |
| B2268 | Steering Wheel Climate Control Circuit Open | If vehicle is not equipped with steering wheel control switches, IGNORE this code and CONTINUE diagnosis. If vehicle is equipped with steering wheel control switches, go to Pinpoint Test G . |
| B2269 | Steering Wheel Climate Control Circuit Short to Ground | Go to Pinpoint Test G . |
| B2477 | Module Configuration Failure | CONFIGURE the HVAC module. REFER to MODULE CONFIGURATION article. |
| U1040 | SCP (J1850) Invalid or Missing Data for Vehicle Speed | If DTCs are present in the PCM, REFER to the PCM DTC CHARTS
and diagnose the DTCs. If DTCs are present in the Instrument Cluster (IC), REFER to INSTRUMENTATION, MESSAGE CENTER, & WARNING CHIMES
article and diagnose the DTCs. If this DTC is only present in the HVAC module, ignore code and continue diagnostics. |
| U1073 | SCP (J1850) Invalid or Missing Data for Engine Coolant | If DTCs are present in the PCM, REFER to the PCM DTC CHARTS
and diagnose the DTCs. If DTCs are present in the IC, REFER to INSTRUMENTATION, MESSAGE CENTER, & WARNING CHIMES
article and diagnose the DTCs. If this DTC is only present in the HVAC module, ignore code and continue diagnostics. |
| U1112 | SCP (J1850) Invalid or Missing Data for Primary Id $70 | Go to INTERIOR LIGHTING article, Inspection and Verification to continue diagnosis. |
| All Other DTCs | - | REFER to the Master DTC Chart in MULTIFUNCTION ELECTRONIC MODULES article. |