Diagnostic Test

WARNING: This page is about a different car, the 2013 RAM 3500 HD and 2013 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK IF DTC IS ACTIVE
1. Ignition on, engine not running.
2. Using the scan tool, read HVAC DTCs.
  Is this DTC active?
  
  Yes
  - Go To 3
  No
  - Go To 2
PERFORM HVAC ACTUATOR CALIBRATION TEST
1. Using the scan tool, perform the HVAC Actuator Calibration Test.
  Did this DTC change from Stored to Active while performing the HVAC Actuator Calibration Test?
  
  Yes
  - Go To 3
  No
  - Go To 6
CHECK THE (C252) PASSENGER BLEND DOOR DRIVER CIRCUIT FOR AN OPEN
1. Turn the ignition off to the lock position.
2. Disconnect the A/C Heater Module C1 harness connector.
3. Disconnect the Passenger Blend Door Actuator harness connector.
4. Measure the resistance of the (C252) Passenger Blend Door Driver circuit between the A/C Heater Module C1 harness connector and the Passenger Blend Door Actuator harness connector.
  Is the resistance above 1.0 Ohm?
  
  Yes
  - Repair the (C252) Passenger Blend Door Driver circuit for an open or high resistance.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK THE (C52) COMMON DOOR DRIVER 2 CIRCUIT FOR AN OPEN
1. Measure the resistance of the (C52) Common Door Driver 2 circuit between the A/C Heater Module C1 harness connector and the Passenger Blend Door Actuator harness connector.
  Is the resistance above 1.0 Ohm?
  
  Yes
  - Repair the (C52) Common Door Driver 2 circuit for an open or high resistance.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
CHECK THE PASSENGER BLEND DOOR ACTUATOR
1. Replace the Passenger Blend Door Actuator in accordance with the Service Information. Refer to ACTUATOR, BLEND DOOR, REMOVAL .
2. With the scan tool, erase HVAC DTCs and perform the HVAC Actuator Calibration Test.
  Did this DTC reset?
  
  Yes
  - Replace and program the A/C Heater Module in accordance with the Service Information. Refer to MODULE, A/C AND HEATER, INSTALLATION .
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE WIRING AND CONNECTORS
1. The conditions necessary to set the DTC are not present at this time.
2. Using the scan tool, check the Environmental Data to help identify the conditions in which the DTC was set.
3. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
4. Wiggle the wiring and connectors while checking for shorted and open circuits.
  Were there any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.