Dynamic Apply

While the vehicle is moving, the dynamic apply mode gives emergency braking. At a vehicle speed greater than 3 km/h (2 mph), operating and holding the Electric Park Brake (EPB) switch in the apply position 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 message from the Anti-lock Brake System (ABS) control module to the Body Control Module/Gateway Module (BCM/GWM) assembly. The dynamic apply operation is cancelled if the EPB switch is either released to its neutral position or operated to the release position, or when the accelerator pedal is pressed.

The dynamic apply operation is cancelled in the following cases:

• The EPB switch is either 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).