2010 Cadillac CTS Sedan AWD V6-3.6L Page 230
commanded in both directions.
瀚慖f the test lamp remains OFF during either of the commands, test for a short to ground on either control circuit. If the circuits test normal,
replace the HVAC control module.
12. If both circuits test normal, test or replace the actuator.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Air Inlet Valve Actuator Replacement (Left Hand Drive) (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service
and Repair/Air Inlet Valve Actuator Replacement)Air Inlet Valve Actuator Replacement (Right Hand Drive) (See: Application and ID)
* Mode Valve Actuator Replacement (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and Repair/Mode
Valve Actuator Replacement)
* Temperature Valve Actuator Replacement - Left Side (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service and
Repair/Temperature Valve Actuator Replacement - Left Side)
* Temperature Valve Actuator Replacement - Right Side (See: Heating and Air Conditioning/Air Door/Air Door Actuator / Motor/Service
and Repair/Temperature Valve Actuator Replacement - Right Side)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for the HVAC control module replacement, setup,
and programming
B0418
DTC B0248, B0268, B0408, B0413, B0418, B0423, B3761, or B3773
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 the diagnostic category.
DTC Descriptors
DTC B0248 61
- Air Flow Control 3 Circuit Actuator Stuck
DTC B0268 61
- Air Flow Control 7 Circuit Actuator Stuck
DTC B0408 61
- Temperature Control 1 Circuit Actuator Stuck
DTC B0413 06
- Temperature Control 1 Feedback Circuit Short to Ground or Open
DTC B0418 61
- Temperature Control 2 Circuit Actuator Stuck
DTC B0423 06
- Temperature Control 2 Feedback Circuit Short to Ground or Open
DTC B3761 06
- Air Flow Control 3 Feedback Circuit Short to Ground or Open
DTC B3773 06
- Air Flow Control 7 Feedback Circuit Short to Ground or Open
Diagnostic Fault Information
