Circuit Description
WARNING: This page is about a different car, the 2004 Oldsmobile Bravada and 2004 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
The transfer case encoder motor is a permanent magnet DC motor and gear reduction assembly. When energized through motor feed A, motor control B provides the ground through the transfer case shift control module ground circuit. The motor, through a series of gears, rotates the sector shaft of the transfer case which applies varying force to a set of clutch plates, controlling the torque applied to the front wheels.
This DTC detects an open, short to voltage or short to ground in the motor feed A or motor control B circuits, an open in the module ground circuit, or an open or short to ground inside the motor.