Diagnostic Test

WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FOR RELATED DTCS
1. Ignition on.
2. Using the scan tool, read HVAC DTCs.
  Are there any Door Control Circuit Open, Performance, or Short to Ground or Voltage DTCs present?
  
  Yes
  - Perform the appropriate diagnostic procedure.
    Refer to DIAGNOSIS AND TESTING .
  No
  - Go To 2
CHECK FOR AN ACTIVE DTC
1. With the scan tool, read HVAC DTCs and record on the repair order.
2. Record the Environmental Data.
3. With the scan tool, erase DTCs.
4. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
5. With the scan tool, read HVAC DTCs.
  Did the DTC return?
  
  Yes
  - Go To 4
  No
  - Go To 3
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 4
  No
  - Go To 6
CHECK THE RECIRCULATION DOOR
1. Remove the Recirculation Door Actuator and check the Recirculation Door for binding and full travel. Refer to ACTUATOR, RECIRCULATION DOOR, REMOVAL .
  Were any problems found?
  
  Yes
  - Repair or replace the Recirculation Door as necessary in accordance with the Service Information. Refer to HOUSING, HVAC, REMOVAL .
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
CHECK THE RECIRCULATION DOOR ACTUATOR
1. Replace the Recirculation Door Actuator in accordance with the Service Information. Refer to ACTUATOR, RECIRCULATION DOOR, REMOVAL .
2. Using the scan tool, erase HVAC DTCs.
3. Using the scan tool, perform the HVAC ACTUATOR CALIBRATION TEST.
  Did this DTC reset during HVAC ACTUATOR CALIBRATION TEST?
  
  Yes
  - Replace and program the A/C Heater Control in accordance with the Service Information. Refer to CONTROL, A/C AND HEATER, REMOVAL .
  - 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 any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.