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 THE VEHICLE CONFIGURATION
NOTE:
The DTC must be active and no BUS communication DTCs present before performing this test. If BUS communication DTCs are present, perform there respective test first. If the DTC is stored, erase the DTC and cycle the ignition. If the DTC resets and changes to active, then proceed.
1. With the scan tool, check the vehicle configuration stored in the Body Control Module (BCM).
2. With the scan tool, check the vehicle configuration stored in the A/C Heater Module (HVAC).
  Pick the answer that best describes your findings:
  
  BCM has wrong or no vehicle configuration.
  - With the scan tool, program the proper vehicle configuration in the BCM.
  - Perform the HVAC VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  HVAC has wrong vehicle configuration but BCM has correct configuration.
  - 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 .
  HVAC and BCM have proper calibration and the DTC is active in the HVAC.
  - Check if other modules such as the Powertrain Control Module (PCM) have the wrong configuration stored in the controller and reprogram or replace as necessary. If all other modules show the proper configuration, 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 .