Antilock Brake System

CIRCUIT DIAGRAM





INSPECTION PROCEDURE

CIRCUIT DESCRIPTION:
These DTCs are designed to detect a slipping front ESB. During initialization and braking, the front motor is rehomed. If the ESB slips, the motor/piston will move. During the next ignition "ON" initialization, a rehome of the motor verifies that the motor/piston remained at the home position. If motor movement is detected, the ESB must be slipping.

FAILURE CONDITION:
DTCs 38 and 41 can be set during initialization. If the Electronic Brake Control Module (EBCM) detects that the ESB could not hold the piston in the home position, a malfunction exists.

DIAGNOSTIC AIDS:
An "intermittent" malfunction of this DTC may be caused by a sticking, binding or slipping mechanical part of the system.
The frequency of the malfunction can be checked by using the enhanced diagnostic feature of the TECH-1 as described in "TECH-1 Diagnostics".
The hydraulic control test function of the TECH-1 may be used to locate an intermittent malfunction associated with the ESB.