Four-Wheel Drive (4WD) Control Module
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
The 4WD control module is on the high speed CAN. The 4WD control module regulates the duty cycle to the active torque coupling between FWD and 4WD when more traction is required. Check the high speed CAN circuits 1908 (WH) and 1909 (BK), between the 4WD control module C3253 and the DLC C251. Total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms, there is an open circuit in the high speed CAN, damage to the DLC C251, damage to the 4WD control module C3253, or a problem in the in-line connector. For additional information, refer to FOUR-WHEEL DRIVE SYSTEMS .