Dynamic Apply

WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 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. Operating and holding the Electric Park Brake (EPB) switch in the apply position produces a gradual deceleration of the vehicle. This process will take place at a vehicle speed greater than 3 km/h (2 mph). The red EPB warning indicator illuminates, together with a warning in the message center and a warning chime.

The vehicle stop lamps lights on, activated by a message from the Anti-lock Brake System (ABS) control module to the Body Control Module/Gateway Module (BCM/GWM).

The dynamic apply operation is cancelled in the following cases:

The EPB switch is released to its NEUTRAL position.
The EPB switch is operated to the RELEASE position.
The accelerator pedal is pressed.

There are 3 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 4 wheels to decelerate the vehicle. The ADBF mode uses the EPB actuators to operate the rear brakes to decelerate the vehicle.