Anti-Lock Brake System - TEVES Mark 20: Description

The Teves Mark 20 Anti-Lock Brake System (ABS) is designed to prevent wheel lock-up during heavy braking, allowing the driver to maintain steering control while stopping vehicle in shortest distance possible.

ABS uses a diagonal-split, hydraulic brake system. In standard brake mode, master cylinder primary circuit supplies pressure to right front and left rear brakes. Master cylinder secondary circuit supplies pressure to left front and right rear brakes. During an ABS stop, each brake is independently controlled by using separate hydraulic circuits for each brake. The ABS becomes enabled at speeds greater than 3-5 MPH and will automatically turn off when vehicle speed is less than 3-4 MPH.

ABS is equipped with a Red BRAKE warning light and an Amber ABS warning light located on instrument cluster, a brake booster and master cylinder. The Controller Anti-Lock Brake (CAB) and Hydraulic Control Unit (HCU) are integrated into one unit, the Integrated Control Unit (ICU). See Fig 1 and Fig 2 . An ABS fuse is located in junction block. ABS pump fuse and ABS valve fuse are located in Power Distribution Center (PDC). See Fig 3 . ABS also uses a brakelight switch, 2 proportioning valves and 4 wheel speed sensors. CAB communicates with scan tool via the Data Link Connector (DLC). See Fig 4 .

The Teves Mark 20 ABS may be equipped with a Traction Control System (TCS) which prevents front wheel slippage during fast acceleration at speeds less than 35 MPH. Models with TCS use a traction control switch mounted on upper right trim bezel. See Fig 5 . An Amber traction control warning (TRAC OFF) light and a Green traction control function (TRAC ON) light are located on instrument cluster.