This bulletin applies to a range of Dodge Ram 4x4 trucks equipped with an electronic transfer case and built before Jan. 6, 2012, where the “Service 4WD” light is illuminated and the DTCM requires reprogramming.

This involves the following trucks:

  • 2011-2012 1500,
  • 2012 3500,
  • 2012 2500, and
  • 2012 4500/5500 cab chassis.

The technician may find DTC C2201 (FDCM/DTCM internal DTC) is set in the DTCM. When the system detects this, it shuts down the 4WD capability for the remainder of the drive cycle. This condition is not monitored in 2WD mode.

Updating the DTCM software will correct the condition. Use wiTECH software release 12.02 or higher.

About the Author

Information courtesy of Mitchell 1

Information for Technical Service Bulletins comes from ProDemand, Mitchell 1's auto repair information software for domestic and import vehicles. Headquartered in San Diego, Mitchell 1 has provided quality repair information solutions to the automotive industry since 1918.

About the Author

Mike Mavrigian | Editor

Mike received a BA degree from Youngstown State University in English Literature with a minor in Journalism in 1975.