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 AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read the 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
1. Turn the ignition off.
2. Disconnect the Transfer Case Switch harness connector.
3. Connect a jumper wire between the (T314) Transfer Case Range Position Sensor circuit and ground circuit at the Transfer Case Switch harness connector.
4. Turn the ignition on.
5. With the scan tool, read DTCs
  Does the scan tool display C1403-11-TRANSFER CASE RANGE POSITION SENSOR-CIRCUIT SHORT TO GROUND?
  
  Yes
  - Replace the Transfer Case Switch in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (T314) TRANSFER CASE RANGE POSITION SENSOR CIRCUIT FOR AN OPEN
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 below 5 Ohms?
  
  Yes
  - Repair the open in the (T314) Transfer Case Range Position Sensor circuit.
  - 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 .