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 ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 2
  No
  - Test complete. The condition or conditions that originally set this DTC are not present at this time. 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.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE TRANSFER CASE SWITCH FOR AN INTERNAL SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the Transfer Case Switch harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs
  Does the scan tool display this DTC as active?
  
  Yes
  - Go To 3
  No
  - Replace the Transfer Case Switch in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (T314) TRANSFER CASE RANGE POSITION SENSOR CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the BCM D harness connector.
3. Measure the resistance between ground and the (T314) Transfer Case Range Position Sensor circuit.
  Is the resistance above 10k Ohms?
  
  Yes
  - Repair the (T314) Transfer Case Range Position Sensor circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .