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, record and erase the DTCs.
3. Try to start the engine.
4. With the scan tool, read RF Hub DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - 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 and repair as necessary. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (F20) IGNITION SWITCH OUTPUT CIRCUIT FOR A SHORT TO BATTERY
1. Turn the ignition off.
2. Disconnect the Radio Frequency Hub (RF Hub) C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (F20) Ignition Switch Output circuit at the Radio Frequency Hub (RF Hub) C1 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (F20) Ignition Switch Output circuit for a short to voltage.
  - Perform the BODY VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Radio Frequency Hub (RF Hub) Module in accordance with the Service Information. Refer to MODULE, RADIO FREQUENCY (RF HUB), REMOVAL .
  - Perform the RADIO FREQUENCY HUB VERIFICATION TEST. Refer to STANDARD PROCEDURE .