ABS CM PART FUNCTION

id041300185300

• The ABS CM detects the vehicle wheel speeds based on the signals from the four ABS wheel- speed sensors. The CM calculates the rotation condition of each wheel from the relation between the detected vehicle wheel speed and the estimated (based on the detected speed) vehicle speed from there on. It then accordingly controls brake fluid pressure to each wheel to prevent lock-up.

Function Table

Function name

Contents

ABS control function

•  Controls brake fluid pressure when braking to maintain directional stability, ensure steerability and reduce stopping distance.

On-board diagnostic system

•  Main components of the ABS control system have a self-diagnosis function. In case a malfunction occurs, warning lights illuminate to alert the driver, and at the same time a DTC is stored in the ABS HU/CM.

•  When a malfunction is determined as a result of on-board diagnosis, system control is suspended or limited to prevent any dangerous situation while driving.

Function name	Contents
ABS control function	• Controls brake fluid pressure when braking to maintain directional stability, ensure steerability and reduce stopping distance.
On-board diagnostic system	• Main components of the ABS control system have a self-diagnosis function. In case a malfunction occurs, warning lights illuminate to alert the driver, and at the same time a DTC is stored in the ABS HU/CM. • When a malfunction is determined as a result of on-board diagnosis, system control is suspended or limited to prevent any dangerous situation while driving.