Normal Operation and Fault Conditions
Under normal operation, the rear auxiliary control is supplied a 5-volt reference and ground from the HVAC module. When the auxiliary blower motor speed, airflow mode or temperature control is adjusted, the HVAC module reads the voltage from the rear auxiliary climate controls on the auxiliary blower motor speed, airflow mode and temperature control feedback circuits to determine the requested setting.
DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B11EB:11 | Rear HVAC Temperature Control Input: Circuit Short to Ground | This CMDTC sets when the HVAC module senses a short to ground on the rear auxiliary climate controls temperature input circuit. |
| B11EB:15 | Rear HVAC Temperature Control Input: Circuit Short to Battery or Open | This CMDTC sets when the HVAC module senses an open circuit or a short to voltage on the rear auxiliary climate controls temperature input circuit. |
| B11EC:11 | Rear HVAC Blower Control Input: Circuit Short to Ground | This CMDTC sets when the HVAC module senses a short to ground on the rear auxiliary climate controls blower speed input circuit. |
| B11E:15 | Rear HVAC Blower Control Input: Circuit Short to Battery or Open | This CMDTC sets when the HVAC module senses an open circuit or a short to voltage on the rear auxiliary climate controls blower speed input circuit. |
| B121D:11 | Rear HVAC Mode Control Input: Circuit Short to Ground | This CMDTC sets when the HVAC module senses a short to ground on the rear auxiliary climate controls airflow mode input circuit. |
| B121D:15 | Rear HVAC Mode Control Input: Circuit Short to Battery or Open | This CMDTC sets when the HVAC module senses an open circuit or a short to voltage on the rear auxiliary climate controls airflow mode input circuit. |