B1058 JEEP – Recirculation Door Control

B1058 JEEP Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

B1058 JEEP Possible Causes

Faulty Recirculation Door Actuator,Recirculation Door Actuator harness is open or shorted,Recirculation Door Actuator circuit poor electrical connection,Faulty A/C Heater Module

B1058 JEEP Description

After 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.