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Home >> Ford >> 2020 >> Expedition XLT, 4WD >> Repair and Diagnosis (Single Page) >> Transmission >> Transmission Control Systems >> Four-Wheel Drive Systems >> Description And Operation >> Four-Wheel Drive Systems - System Operation and Component Description >> Network Message Chart >> TCCM Network Input Messages
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TCCM Network Input Messages

Broadcast Message Originating Module Message Purpose
Wheel speed data ABS module The TCCM uses wheel speed information for the four-wheel drive system to determine percentage of torque to be transferred to the front wheels.
Steering wheel angle ABS The TCCM uses steering wheel angle information to disengage the 4WD clutch to prevent bind up during parking lot maneuvers in 4A, 4H, and to some degree in 4L.
Gear and level state TCM The TCCM uses gear and level state for the four-wheel drive system to determine percentage of torque to be transferred to the front wheels.