Conditions For Setting DTC
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1998 GMC Yukon, 1998 GMC Suburban, 1998 GMC Pickup, 1998 GMC Cab & Chassis, and 1998 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
System will set DTC when ATC control module senses all high or low voltage on encoder channel circuits.
When this DTC is set, all motor activity will stop and transfer case lock (brake control solenoid) is engaged. A default rail-to-rail shift may be allowed (toggle between 4H and 2H). SERVICE 4WD light will be on for remainder of current ignition cycle.