B1081 MERCURY Possible Causes
- Faulty Temperature Damper Motor
- Temperature Damper Motor harness is open or shorted
- Temperature Damper Motor circuit poor electrical connection
- Faulty Heating, Ventilation, and Air Conditioning (HVAC) Module
First diagnose B1081 MERCURY code
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 terminals.
B1081 MERCURY Tech NotesB1081:11 - Left Temperature Damper Motor: Circuit Short to Ground
B1081:12 - Left Temperature Damper Motor: Circuit Short to Battery
B1081:13 - Left Temperature Damper Motor: Circuit Open
Cost of diagnosing the B1081 MERCURY code
Labor: 1.0The cost of diagnosing the B1081 MERCURY code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B1081 MERCURY Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B1081 MERCURY Meaningo rotate the temperature blend door actuator, the Heating, Ventilation, and Air Conditioning (HVAC) module supplies voltage and ground to the temperature blend door actuator through the door actuator motor circuits. To reverse the temperature blend door actuator rotation, the HVAC module reverses the voltage and ground circuits.
The temperature blend door actuator feedback resistors are supplied a ground from the HVAC module by the temperature blend door actuator return circuits and a 5-volt reference voltage on the temperature blend door actuator reference circuits. The HVAC module reads the voltage on the temperature blend door actuator feedback circuits to determine the temperature blend door actuator position by the position of the actuator feedback resistor wiper arm.
During an actuator calibration cycle, the HVAC module drives the temperature blend door until the door reaches both internal stops in the HVAC case. If the temperature blend door is temporarily obstructed or binding during a calibration cycle, the HVAC module may interpret this as the actual end of travel for the door. When this condition occurs and the HVAC module commands the actuator to its end of travel, the airflow may not be the expected temperature.
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