Description And Operation: Operation: Notes

WARNING: This page is about a different car, the 2018 Jaguar XF and 2017 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.

The Transfer Case Control Module (TCCM) is connected to the:

High Speed (HS) Controller Area Network (CAN) chassis systems bus, and
High Speed (HS) Controller Area Network (CAN) powertrain systems bus.

The TCCM receives data from various control modules including the ECM (Engine Control Module) and the ABS (Anti-lock Brake System) control module. Using this information the TCCM determines the required torque to be applied to the front wheels via an electro-hydraulic controlled clutch and chain gear drive to the front driveshaft.

There are two stages of operation the first stage is a pre-emptive stage. In this stage, the vehicle systems are evaluating road surface conditions and assessing the level of traction.

Once the level of traction is understood, the system moves into a second stage of control. This is where an optimum front to rear torque split is determined, based on vehicle speed and cornering conditions.

The TCCM also features a reactive feedback loop to increase torque to the front axle if traction is lost and slip occurs. The TCCM works in conjunction with the:

Dynamic Stability Control (DSC)
Electronic Traction Control (ETC)
and Anti-lock Brake (ABS) systems to maintain the vehicle's traction and stability.

Torque on Demand Benefits:

Full traction capability when required.
Supports a Wide range of vehicle handling characteristics.