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. With the scan tool, read HVAC DTCs.
  Is this DTC active?
  
  Yes
  - Go To 3
  No
  - Go To 2
PERFORM HVAC ACTUATOR CALIBRATION TEST
1. With 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 (C801) MODE DOOR 2 (DEFROST) DRIVER CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off to the lock position.
2. Disconnect the A/C Heater Module C1 harness connector.
3. Disconnect the Mode Door 2 Actuator harness connector.
4. Ignition on, engine not running.
5. Measure the voltage of the (C801) Mode Door 2 Driver circuit.
  Is there any voltage present?
  
  Yes
  - Repair the (C801) Mode Door 2 (Defrost) Driver circuit for a short to voltage.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK THE (C807) COMMON DOOR DRIVER CIRCUIT 2 FOR A SHORT TO VOLTAGE
1. Measure the voltage of the (C807) Common Door Driver 2 circuit.
  Is there any voltage present?
  
  Yes
  - Repair the (C807) Common Door Driver 2 circuit for a short to voltage.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 5
CHECK THE MODE DOOR 2 ACTUATOR
1. Turn the ignition off to the lock position.
2. Replace the Mode Door Actuator in accordance with the Service Information. Refer to ACTUATOR, MODE DOOR, REMOVAL .
3. 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. With 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.