Electronic Brake PREFILL

Electronic brake prefill senses any rapid throttle lift off, activating a small brake hydraulic pressure build-up of approximately 3 to 5 bar (43.5 to 72.5 lbf/in² ) in anticipation of the brakes being applied. This gives a quicker brake pedal response and consequently slightly shorter stopping distances.

When the Anti-lock Brake System (ABS) control module detects rapid throttle lift off (from the signals received from the Powertrain Control Module (PCM) over the High Speed (HS) Controller Area Network (CAN) chassis bus), it applies a low brake pressure to all of the brakes to assist in a quicker brake application.