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 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.
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.
Mike Mavrigian has written thousands of automotive technical magazine articles involving a variety ofspecialties, from engine building to wheel alignment, and has authored more than a dozen books that crisscross the automotive spectrum. Mike operates Birchwood Automotive, an Ohio shop that builds custom engines and performs vintage vehicle restorations. The shop also features a professional photo studio to document projects and to create images for articles and books.
