2010 Cadillac Truck SRX AWD V6-3.0L Page 379
test normal, replace the appropriate actuator.
3. If all circuits test normal, replace the K33 HVAC Control Module
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* HVAC Component Replacement Reference (See: Heating and Air Conditioning/Service and Repair/Removal and Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for HVAC control module replacement, setup, and
programming
B0509
DTC B0173, B0178, B0509, B0514, B0519, B3583, or B3933
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC B0173 02
- Upper Left Duct Air Temperature Sensor Circuit Short to Ground
DTC B0173 05
- Upper Left Duct Air Temperature Sensor Circuit High Voltage/Open
DTC B0178 02
- Lower Left Duct Air Temperature Sensor Circuit Short to Ground
DTC B0178 05
- Lower Left Duct Air Temperature Sensor Circuit High Voltage/Open
DTC B0509 02
- Upper Right Duct Air Temperature Sensor Circuit Short to Ground
DTC B0509 05
- Upper Right Duct Air Temperature Sensor Circuit High Voltage/Open
DTC B0514 02
- Lower Right Duct Air Temperature Sensor Circuit Short to Ground
DTC B0514 05
- Lower Right Duct Air Temperature Sensor Circuit High Voltage/Open
DTC B0519 02
- Rear Upper Duct Air Temperature Sensor Circuit Short to Ground
DTC B0519 05
- Rear Upper Duct Air Temperature Sensor Circuit High Voltage/Open
DTC B3583 02
- Rear Lower Duct Air Temperature Sensor Circuit Short to Ground
DTC B3583 05
- Rear Lower Duct Air Temperature Sensor Circuit High Voltage/Open
DTC B3933 02
- Air Conditioning Evaporator Temperature Sensor Circuit Short to Ground
DTC B3933 05
- Air Conditioning Evaporator Temperature Sensor Circuit High Voltage/Open
Circuit/System Description
