System Description and Function Operation

TEVES MARK 20e SYSTEM DESCRIPTION
The controller antilock brake module is used to monitor wheel speeds and to modulate (control) hydraulic pressure in each brake channel. The modulated hydraulic pressure is used to prevent wheel lock-up during braking.

The Teves Mark 20e system uses a diagonal split hydraulic brake system. In the standard brake mode the master cylinder primary circuit supplies pressure to the right front and left rear wheel brakes, and the secondary master cylinder circuit supplies pressure to the left front and right rear wheel brakes.

During and antilock stop the Mark 20e system uses four-channel operation. This means that each wheel brake is independently controlled. By using a separate hydraulic channel for each wheel, the system is able to retain directional stability and steering control while applying maximum braking. The system provides maximum braking even when road conditions vary.

ABS PLUS DESCRIPTION
ABS Plus operates like Traction Control except that the brake pedal must be applied for ABS Plus to be activated. Also, in contrast to the ABS function, a brake is applied rather than released. When the brake pedal is depressed far enough to close the brake lamp switch, the Controller Antilock Brake (CAB) will monitor and compare the speeds of the front (driven) wheels. When the CAB detects that a wheel is turning disproportionately faster then vehicle speed, it will apply the brake at that wheel to control a possible skid and help maintain directional control.

The driver may report the sound of the ABS pump motor running when the brake is not applied hard enough to cause an ABS event.