When Monitored And Set Conditions

When Monitored: 

This diagnostic runs one time during an ignition cycle when the following conditions are met:

• The ignition is in the ON / RUN position or has been Remote Started.

• No active CAN DTCs (U0001-00 or U0002-00).

• Battery voltage is between 6.0 - 16.0 volts.

Set Conditions: 

• Whenever the RF Hub performs a handshake with the PCM and does not receive a security seed response from the PCM.

Default Actions: 

• The engine may crank but will not continue to run for more that a few seconds.

1. CHECK FOR AN ACTIVE DTC 
   1. With the scan tool, create a Vehicle Scan Report and attach it to the repair order.
   2. Cycle the Ignition Off, and wait fifteen seconds before turning the Ignition On.
   3. Wait one minute, and read the active PCM codes.

      Does the scan tool display any starting, ignition or charging DTCs in the PCM?

      Yes 

      • Check for a blown fuse or bent pins on the PCM RUN/START circuits. The result is the PCM does not know the ignition has been turned to the RUN position and does not know to respond to the seed request. Check the PCM RUN/START circuits to the PCM before proceeding with this procedure.
      • Refer to DTC INDEX - 2500 HD & 3500 HD and perform the appropriate diagnostic procedure(s).

      No 

      • Go To  2
2. CHECK THE RF HUB 
   1. Cycle the Ignition Off, and wait fifteen seconds before turning the Ignition On.
   2. Wait one minute, and read the active RF Hub DTCs.

      Is the DTC active?

      Yes 

      • Program the Powertrain Control Module in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to appropriate Diagnostic Information .

      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 .