B105C RAM - Recirculation Door Travel Range Too Small

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

B105C RAM Possible Causes

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

How do I fix code B105C RAM?

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.
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Cost of diagnosing the B105C RAM code

Labor: 1.0

The cost of diagnosing the B105C RAM 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)

B105C RAM Description

After the initial installation of the A/C Heater Module, the controller is calibrated to each individual blend/mode door actuator. These calibrations are stored as in the number of pulses it takes to move the door from one stop to another. The A/C Heater Module drives the Door Actuators by the use of Door Driver circuit and a Common Door Driver circuit and monitors all door actuator pulses to detect door movement in both directions. Most of the door actuators share a common door driver circuit but each door actuator has its own unique driver circuit. Due to shared circuitry, similar Diagnostic Trouble Codes (DTCs) can set at the same time for multiple actuators depending upon the type of circuit malfunction, its location, and the direction the actuator is moving when the malfunction is present.
OBDII Code B105c Ram - Recirculation Door Travel Range Too Small - AutoCodes.com

More Information

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