Air Flow Control 7 Feedback Circuit Short to Ground or Open
Table of contents
B3773 CADILLAC Possible Causes
- Faulty Recirculation Door Actuator
- Recirculation Door Actuator harness is open or shorted
- Recirculation Door Actuator circuit poor electrical connection
- Faulty Auxiliary Heating and Cooling Systems (HVAC) Control Module
How do I fix code B3773 CADILLAC?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the B3773 CADILLAC code
The cost of diagnosing the B3773 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B3773 CADILLAC Description
The Auxiliary Heating, Ventilation, and Air Conditioning (HVAC) Control Module controls the HVAC door actuators to regulate the airflow through the HVAC system. Each actuator consists of an electric motor and a potentiometer. The module supplies a low reference and 5-volt reference source voltage to the potentiometer. The HVAC control module monitors the voltage drop across the potentiometer on the door position signal circuit. When the actuator shaft rotates, the voltage on the door position signal circuit changes. The HVAC control module supplies the actuator motor with a 12-volt control circuit and a ground control circuit. The HVAC module controls the direction of the actuator door by changing the polarity of the control circuits.