DTC 54

CIRCUIT DIAGRAM








INSPECTION PROCEDURE

CIRCUIT DESCRIPTION:
This DTC will diagnose a motor that is energized longer than expected. This could occur if a wheel speed sensor is malfunctioning, the motor does not turn or the motor wires are crossed.

FAILURE CONDITION:
DTC 54 can be set only during an Antilock Brake System (ABS) stop. If the Electronic Brake Control Module (EBCM) commands the rear channel in release for three seconds, a malfunction exists.

DIAGNOSTIC AIDS:
An "intermittent" malfunction may be caused by a sticking or binding mechanical part of the system.
The frequency of the malfunction can be checked by using the enhanced diagnostic function of the TECH-1 as described in "TECH-1 Diagnostics. Using the TECH-1, perform the hydraulic test to ensure that the total brake system is functional.
Any circuitry that is suspected of causing the intermittent malfunction should be thoroughly checked for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to wiring connections or physical damage to the wiring harness.