Circuit Description
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.
ATC control module controls transfer case brake control solenoid. Solenoid is energize (locking action released) during gear shifts and in AUTO mode. When power or ground is removed from solenoid (locking action applied), transfer case motor is prevented from moving. System is capable of proving 4H and 4L lockup without additional vehicle power to hold transfer case in these positions. This DTC detects an open solenoid coil, open circuit and/or open feed to solenoid.