C1245

DTC C1245 (1 Of 3):

DTC C1245 (2 Of 3):

DTC C1245 (3 Of 3):

CIRCUIT DESCRIPTION
This DTC is designed to detect a bound-up ESB, a stuck ABS motor, or a seized brake modulator. When the release is commanded during initialization the ESB should release the ABS motor, resulting in sensed current being less than commanded current (motor is spinning freely). If the ABS motor is not moving, sensed current will be equal to stall current.

CONDITIONS FOR SETTING THE DTC
DTC C1245 can be set during brake motor initialization at 0 km/h (0 mph) with the brake off or DTC C1245 can be set during brake motor initialization at 5 km/h (3 mph) with the brake on. DTC C1245 can also be set during ABS stops. If the EBCM detects a condition in which it cannot move the ABS motor in either direction, a malfunction exists.

ACTION TAKEN WHEN THE DTC SETS
This malfunction indicates the channel cannot be moved properly. A malfunction DTC is stored, ABS is disabled, and the amber ABS warning indicator is turned on.

DIAGNOSTIC AIDS
An intermittent malfunction in this DTC may result from a mechanical part of the system that sticks, binds, or slips. The frequency of the malfunction can be checked by using the enhanced diagnostic function of the scan tool. DTC C1245 may set after modulator disassembly if the modulator pistons are positioned at the bottom of their bore. 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.