Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.

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 MODE DOOR ACTUATOR CIRCUIT RESISTANCE

Fig 1: Checking Mode 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 (C266) Mode Door Driver circuit and the (C66) Mode 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 (C266) MODE DOOR DRIVER CIRCUIT FOR AN OPEN

Fig 2: Checking Mode Door Driver Circuit For An Open
Courtesy of CHRYSLER LLC
1. Disconnect the Mode Door Actuator harness connector.
2. Measure the resistance of the (C266) Mode Door Driver circuit between the Mode 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 (C266) Mode 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 (C66) MODE DOOR COMMON DRIVER CIRCUIT FOR AN OPEN

Fig 3: Checking Mode Door Common Driver Circuit For An Open
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (C66) Mode Door Common Driver circuit between the Mode Door Actuator harness connector and the A/C Heater Control C2 harness connector.
  Is the resistance below 5.0 ohms?
  
  Yes
  - Replace the Mode 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 (C66) Mode Door Common Driver circuit for an open.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure