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 FOR AN 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 STANDARD PROCEDURE .
CHECK FOR AN ACTIVE DTC WITH ONE OF THE COMPONENTS ON THE CIRCUIT DISCONNECTED
1. Turn the ignition off.
2. Disconnect the Compass Module harness connector.
3. Turn the ignition on.
4. Wait 10 seconds.
5. With the scan tool, read DTCs.
  Does the scan tool display this DTC as active?
  
  Yes
  - Repeat this step, as equipped, for the Inside Rear View Mirror, and Light Rain Sensing Module (LRSM). If all components are disconnected and the DTC is still active, Go To 3
  No
  - Replace the component that when disconnected allowed the DTC to go to stored in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (D402) LIN 2 BUS CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the BCM G harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (D402) LIN 2 Bus circuit.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage on the (D402) LIN 2 Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Go To 4
CHECK THE (D402) LIN 2 BUS CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Measure the resistance between ground and the (D402) LIN 2 Bus circuit.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short to ground in the (D402) BCM LIN 2 Bus circuit.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  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 STANDARD PROCEDURE .