C1252

DTC C1252 (1 Of 2):

DTC C1252 (2 Of 2):

CIRCUIT DESCRIPTION
This DTC will diagnose an ABS motor that is energized longer than expected. This could occur if a wheel speed sensor is malfunctioning, the ABS motor does not turn, the left front brake solenoid valve mechanically fails open, or the ABS brake motor wires are crossed.

CONDITIONS FOR SETTING THE DTC
DTC C1252 can be set only during an ABS stop. If the EBCM commands the left front ABS channel in release for greater than three seconds, a malfunction exists.

ACTION TAKEN WHEN THE DTC SETS
A malfunction DTC is stored, ABS is disabled, and the amber ABS wanting indicator is turned on.

DIAGNOSTIC AIDS
An intermittent malfunction may be caused by a mechanical part of the system that sticks or binds. The frequency of the malfunction can be checked by using the enhanced diagnostic function of the scan tool. DTC C1252 may occur if on ice and steering wheel is turned to lock during braking. Using the scan tool, perform hydraulic test to ensure total brake system is functional. Any circuitry that is suspected of causing the intermittent complaint 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.

NOTE: J 39200 test leads must be zeroed prior to making any resistance measurements.

After diagnosis is complete, clear the DTCs and test drive the vehicle for three drive cycles to verify that the DTC does not reset. A drive cycle consists of starting the vehicle, driving the vehicle over 16 km/h (10 mph), stopping and then turning the ignition off.

NOTE: Excessive drag or high resistance in the base brake or suspension system must be inspected and corrected before proceeding with DTC diagnosis.