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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> (HVAC Systems (ATC) - Electrical Diagnostics) >> DTC Troubleshooting >> B10AC-Right Blend Door Control Circuit Open >> Diagnostic Test

Diagnostic Test

  1. 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
  2. CHECK THE RIGHT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE 
    Fig 1: Checking Right Blend Door Actuator Circuit Resistance
    GC0096332Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the A/C Heater Control C2 harness connector.
    3. Measure the resistance between the (C252) Right Blend Door Driver circuit and the (C52) Right Blend 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 

  3. CHECK THE (C252) RIGHT BLEND DOOR DRIVER CIRCUIT FOR AN OPEN 
    Fig 2: Checking Right Blend Door Driver Circuit For An Open
    GC0096350Courtesy of CHRYSLER LLC
    1. Disconnect the Right Blend Door Actuator harness connector.
    2. Measure the resistance of the (C252) Right Blend Door Driver circuit between the Right Blend 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 

  4. CHECK THE (C52) RIGHT BLEND DOOR COMMON DRIVER CIRCUIT FOR AN OPEN 
    Fig 3: Checking Right Blend Door Common Driver Circuit For An Open
    GC0096351Courtesy of CHRYSLER LLC
    1. Measure the resistance of the (C52) Right Blend Door Common Driver circuit between the Right Blend Door Actuator harness connector and the A/C Heater Control C2 harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      No