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 THE DOOR DRIVER CIRCUITS FOR A SHORT TO VOLTAGE

Fig 1: Checking Door Driver Circuits For A Short To Voltage
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the A/C Heater Control C2 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (C266) Mode Door Driver circuit, the (C66) Mode Door Common Driver circuit, the (C255) Left Blend Door Driver circuit, the (C55) Left Blend Door Common Driver circuit, the (C252) Right Blend Door Driver circuit, the (C52) Right Blend Door Common Driver circuit, the (C268) Recirculation Door Driver circuit, and the (C68) Recirculation Door Common Driver circuit.
  Is the voltage above 0.2 volts on any of the circuits?
  
  Yes
  - Repair all circuits with voltage above 0.2 volts for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 2
CHECK THE DOOR DRIVER CIRCUITS FOR A SHORT TO GROUND

Fig 2: Checking Door Driver Circuits For A Short To Ground
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Measure the resistance of the (C266) Mode Door Driver circuit, the (C66) Mode Door Common Driver circuit, the (C255) Left Blend Door Driver circuit, the (C55) Left Blend Door Common Driver circuit, the (C252) Right Blend Door Driver circuit, the (C52) Right Blend Door Common Driver circuit, the (C268) Recirculation Door Driver circuit, and the (C68) Recirculation Door Common Driver circuit between ground and the A/C Heater Control C2 harness connector.
  Is the resistance below 10k ohms on any of the circuits?
  
  Yes
  - Repair all circuits with a resistance below 10k ohms for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 3
CHECK THE (C266) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C255) LEFT BLEND DOOR DRIVER CIRCUIT, THE (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT, THE (C252) RIGHT BLEND DOOR DRIVER CIRCUIT, THE (C52) RIGHT BLEND DOOR COMMON DRIVER CIRCUIT, THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT, AND THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT

Fig 3: Checking Door Driver Circuits
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (C266) Mode Door Driver circuit and the (C255) Left Blend Door Driver circuit, the (C55) Left Blend Door Common Driver circuit, the (C252) Right Blend Door Driver circuit, the (C52) Right Blend Door Common Driver circuit, the (C268) Recirculation Door Driver circuit, and the (C68) Recirculation Door Common Driver circuit.
  Is the resistance below 10k ohms on any of the circuits?
  
  Yes
  - Repair all circuits with a resistance below 10k ohms for a short to the (C266) Mode Door Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 4
CHECK THE (C66) MODE DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C255) LEFT BLEND DOOR DRIVER CIRCUIT, THE (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT, THE (C252) RIGHT BLEND DOOR DRIVER CIRCUIT, THE (C52) RIGHT BLEND DOOR COMMON DRIVER CIRCUIT, THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT, AND THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT

Fig 4: Checking Door Common Driver Circuits
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (C66) Mode Door Common Driver circuit and the (C255) Left Blend Door Driver circuit, the (C55) Left Blend Door Common Driver circuit, the (C252) Right Blend Door Driver circuit, the (C52) Right Blend Door Common Driver circuit, the (C268) Recirculation Door Driver circuit, and the (C68) Recirculation Door Common Driver circuit.
  Is the resistance below 10k ohms on any of the circuits?
  
  Yes
  - Repair all circuits with a resistance below 10k ohms for a short to the (C66) Mode Door Common Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 5
CHECK THE (C255) LEFT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C252) RIGHT BLEND DOOR DRIVER CIRCUIT, THE (C52) RIGHT BLEND DOOR COMMON DRIVER CIRCUIT, THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT, AND THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT

Fig 5: Checking Blend & Recirculation Door Driver Circuits
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (C255) Left Blend Door Driver circuit and the (C252) Right Blend Door Driver circuit, the (C52) Right Blend Door Common Driver circuit, the (C268) Recirculation Door Driver circuit, and the (C68) Recirculation Door Common Driver circuit.
  Is the resistance below 10k ohms on any of the circuits?
  
  Yes
  - Repair all circuits with a resistance below 10k ohms for a short to (C255) Left Blend Door Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 6
CHECK THE (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C252) RIGHT BLEND DOOR DRIVER CIRCUIT, THE (C52) RIGHT BLEND DOOR COMMON DRIVER CIRCUIT, THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT, AND THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT

Fig 6: Checking Blend & Recirculation Door Driver Circuits
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (C55) Left Blend Door Common Driver circuit and the (C252) Right Blend Door Driver circuit, the (C52) Right Blend Door Common Driver circuit, the (C268) Recirculation Door Driver circuit, and the (C68) Recirculation Door Common Driver circuit.
  Is the resistance below 10k ohms on any of the circuits?
  
  Yes
  - Repair all circuits with a resistance below 10k ohms for a short to (C55) Left Blend Door Common Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 7
CHECK THE (C252) RIGHT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT AND THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT

Fig 7: Checking For Short To Right Blend Door Driver Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (C252) Right Blend Door Driver circuit and the (C268) Recirculation Door Driver circuit and the (C68) Recirculation Door Common Driver circuit.
  Is the resistance below 10k ohms on any of the circuits?
  
  Yes
  - Repair all circuits with a resistance below 10k ohms for a short to the (C252) Right Blend Door Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 8
CHECK THE (C52) RIGHT BLEND DOOR COMMON DRIVER CIRCUIT FOR A SHORT TO THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT AND THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT

Fig 8: Checking For Short To Right Blend Door Common Driver Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (C52) Right Blend Door Common Driver circuit and the (C268) Recirculation Door Driver circuit and the (C68) Recirculation Door Common Driver circuit.
  Is the resistance below 10k ohms on any of the circuits?
  
  Yes
  - Repair all circuits with a resistance below 10k ohms for a short to the (C52) Right Blend Door Common Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Go to step 9
CHECK THE MODE DOOR ACTUATOR CIRCUIT RESISTANCE

Fig 9: Checking Mode Door Actuator Circuit Resistance
Courtesy of CHRYSLER LLC
1. 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 below 30.0 ohms?
  
  Yes
  - Go to step 10
  No
  - Go to step 11
CHECK THE (C266) MODE DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C66) MODE DOOR COMMON DRIVER CIRCUIT

Fig 10: Checking Mode Door Actuator Circuit Resistance
Courtesy of CHRYSLER LLC
1. Disconnect the Mode Door Actuator harness connector.
2. 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 below 10k ohms?
  
  Yes
  - Repair the (C266) Mode Door Driver circuit for a short to the (C66) Mode Door Common Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - 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
CHECK THE LEFT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE

Fig 11: Checking Left Blend Door Actuator Circuit Resistance
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (C255) Left Blend Door Driver circuit and the (C55) Left Blend Door Common Driver circuit in the A/C Heater Control C2 harness connector.
  Is the resistance below 30.0 ohms?
  
  Yes
  - Go to step 12
  No
  - Go to step 13
CHECK THE (C255) LEFT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C55) LEFT BLEND DOOR COMMON DRIVER CIRCUIT

Fig 12: Checking Left Blend Door Actuator Circuit Resistance
Courtesy of CHRYSLER LLC
1. Disconnect the Left Blend Door Actuator harness connector.
2. Measure the resistance between the (C255) Left Blend Door Driver circuit and the (C55) Left Blend Door Common Driver circuit in the A/C Heater Control C2 harness connector.
  Is the resistance below 10k ohms?
  
  Yes
  - Repair the (C255) Left Blend Door Driver circuit for a short to the (C55) Left Blend Door Common Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Replace the Left Blend 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
CHECK THE RIGHT BLEND DOOR ACTUATOR CIRCUIT RESISTANCE

Fig 13: Checking The Right Blend Door Actuator Circuit Resistance
Courtesy of CHRYSLER LLC
1. 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 below 30.0 ohms?
  
  Yes
  - Go to step 14
  No
  - Go to step 15
CHECK THE (C252) RIGHT BLEND DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C52) RIGHT BLEND DOOR COMMON DRIVER CIRCUIT

Fig 14: Checking The Right Blend Door Actuator Circuit Resistance
Courtesy of CHRYSLER LLC
1. Disconnect the Right Blend Door Actuator harness connector.
2. 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 below 10k ohms?
  
  Yes
  - Repair the (C252) Right Blend Door Driver circuit for a short to the (C52) Right Blend Door Common Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - Replace the Right Blend 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
CHECK THE RECIRCULATION DOOR ACTUATOR CIRCUIT RESISTANCE

Fig 15: Checking The Recirculation Door Actuator Circuit Resistance
Courtesy of CHRYSLER LLC
1. 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 below 30.0 ohms?
  
  Yes
  - Go to step 16
  No
  - Go to step 17
CHECK THE (C268) RECIRCULATION DOOR DRIVER CIRCUIT FOR A SHORT TO THE (C68) RECIRCULATION DOOR COMMON DRIVER CIRCUIT

Fig 16: Checking The Recirculation Door Actuator Circuit Resistance
Courtesy of CHRYSLER LLC
1. Disconnect the Recirculation Door Actuator harness connector.
2. 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 below 10k ohms?
  
  Yes
  - Repair the (C268) Recirculation Door Driver circuit for a short to the (C68) Recirculation Door Common Driver circuit.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure
  No
  - 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
RUN THE ACTUATOR CALIBRATION TEST
1. Reconnect the A/C Heater Control C2 harness connector.
2. Reconnect the all of the Door Actuator harness connectors.
3. Turn the ignition on.
4. With the scan tool, erase HVAC DTCs.
5. Turn the ignition off, wait 10 seconds, and then turn the ignition on.
6. With the scan tool, select System Tests and then select Actuator Calibration Test. When the test is complete, select View DTCs.
  Does the scan tool only display: B10A2-LEFT BLEND DOOR CONTROL CIRCUIT/PERFORMANCE?
  
  Yes
  - 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
  No, Other DTCs Displayed
  - Diagnose and repair the other DTCs.
  No, And No Other DTCs Displayed
  - Using the wiring diagram as a guide, inspect the wiring and connectors for conditions causing an intermittent short. Repair as necessary.
  - Perform the BODY VERIFICATION TEST. Refer to DTC-Based Diagnostics/MODULE, Totally Integrated Power (TIPM) - Standard Procedure