Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSDODGE AND RAM2010CHARGER SE, 5.7 TREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMS(HVAC SYSTEMS (ATC) - ELECTRICAL DIAGNOSTICS)DTC TROUBLESHOOTINGB105B-RECIRCULATION DOOR CONTROL CIRCUIT OPENDIAGNOSTIC TEST

2010 Dodge and Ram Charger SE, 5.7 T

Diagnostic Test

2010 Dodge and Ram Charger SE, 5.7 TSECTION Diagnostic Test

CHECK FOR ACTIVE CONTROL CIRCUIT/PERFORMANCE DTCs
1. Turn the ignition on.
2. With the scan tool, read active HVAC DTCs.
  Does the scan tool display any active: XXXX CONTROL CIRCUIT/PERFORMANCE DTCs?
  
  Yes
  - Diagnose and repair the DTCs.
  No
  - Go to step 2
CHECK THE RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE

Fig 1: Checking The Recirculation Door Actuator Circuit Resistance
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the A/C Heater Control C2 harness connector.
3. Measure the resistance between the (C268) Recirculation Door Driver circuit and the (C68) Recirculation Door Common Driver circuit in the A/C Heater Control C2 harness connector.
  Is the resistance above 70.0 ohms?
  
  Yes
  - Go to step 3
  No
  - Replace the A/C Heater Control in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
CHECK THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT FOR AN OPEN

Fig 2: Checking Recirculation Door Driver Circuit For An Open
Courtesy of CHRYSLER LLC
1. Disconnect the Recirculation Door Actuator harness connector.
2. Measure the resistance of the (C268) Recirculation Door Driver circuit between the Recirculation Door Actuator harness connector and the A/C Heater Control C2 harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Go to step 4
  No
  - Repair the (C268) Recirculation Door Driver circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
CHECK THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT FOR AN OPEN

Fig 3: Checking Recirculation Door Common Driver Circuit For An Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (C68) Recirculation Door Common Driver circuit between the Recirculation Door Actuator harness connector and the A/C Heater Control C2 harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Replace the Recirculation Door Actuator in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Repair the (C68) Recirculation Door Common Driver circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.