Dynamic Apply

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

While the vehicle is moving, the dynamic apply mode gives emergency braking. At a vehicle speed greater than 2 mph (3 km/h), pulling up and holding the EPB switch produces a gradual deceleration of the vehicle. The red EPB warning indicator comes on, together with a warning in the message center and a warning chime. The vehicle stop lamps also come on, activated by a CAN Bus message from the ABS control module to the BCM/GWM (Body Control Module/Gateway Control Module). The dynamic apply operation is cancelled if the EPB switch is either released to its neutral position or pressed down to the release position, or when the accelerator pedal is pressed.

There are three modes of dynamic apply, which the ABS control module uses in the following order of preference:

Hydraulic Dynamic Brake Function (HDBF)
Degraded Dynamic Brake Function (DDBF)
Actuator Dynamic Brake Function (ADBF)

The HDBF and DDBF modes use hydraulic braking on all four wheels to decelerate the vehicle. The ADBF mode uses the EPB actuators to operate the rear brakes to decelerate the vehicle.