ALL WHEEL DRIVE. Control module. A Module in a vehicle used to monitor and Control many components of the vehicle's engine management system. Active Differential. Differential Control Module. From 02/08/2021. To 02/08/2021. To 07/17/2023. Transfer Case Control Module. CONTOUR Unit. Differential. ECC. Engine (ECM). Engine Computer. Engine Unit (ECU). General Purpose Embedded Unit. Powertrain. Transfer Case Shift.