- Faulty Recirculation Door Actuator
- Recirculation Door Actuator harness is open or shorted
- Recirculation Door Actuator circuit poor electrical connection
- Faulty A/C Heater Module
Tech notesB1058-11-RECIRCULATION DOOR CONTROL CIRCUIT SHORT TO GROUND
B1058-12-RECIRCULATION DOOR CONTROL CIRCUIT SHORT TO BATTERY
B1058-13-RECIRCULATION DOOR CONTROL CIRCUIT OPEN
B1058-92-RECIRCULATION DOOR CONTROL PERFORMANCE OR INCORRECT OPERATION
- Engine Light ON (or Service Engine Soon Warning Light)
B1058 Jeep DescriptionAfter the initial installation of the A/C Heater Control, the controller is calibrated to each individual blend/mode door actuator. The actuators are connected to the A/C Heater Control by a dedicated five-wire sensor and control circuits. The actuator can move the blend/mode-air doors in two directions. When the A/C Heater Control pulls the voltage on one side of the control circuit high and the other low, the door actuator will move in one direction. When the A/C Heater Control reverses the polarity of the voltage to the motor, the door actuator moves in the opposite direction. Once the A/C Heater Control makes the voltage to both control circuits high or low, the door actuator will stop its movement and stay in that position. The blend/mode door actuator contains a three wire potentiometer, which the A/C Heater Control uses to monitor the relative position of the blend/mode air doors. The A/C Heater Control learns the blend-air door stop positions during the calibration procedure.
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