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.

TEST FOR INTERMITTENT CONDITION
NOTE:
Verify that the battery is fully charged with a DVOM and use the scan tool to compare the Battery Voltage listed under "Data" in the RFH View to that of the BCM. If the battery is not fully charged, correct this condition before proceeding.
1. Turn the ignition on.
2. Using the scan tool, record and erase the DTCs.
3. Try to start the engine.
4. With the scan tool, read the Active DTCs and wait one minute.
  Does the scan tool display: B215B-11-IGNITION RUN/START 2 CONTROL - CIRCUIT SHORT TO GROUND 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 .
(F20) IGNITION SWITCH OUTPUT CIRCUIT SHORT TO GROUND

Fig 1: Measuring Resistance Between Ground & Ignition Switch Output Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Radio Frequency Hub (RF Hub) C1 harness connector.
3. Measure the resistance between ground and the (F20) Ignition Switch Output circuit.
  Is the resistance below 30k Ohms?
  
  Yes
  - Repair the short to ground in the (F20) Ignition Switch Output circuit.
  - 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 .