C1245

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CIRCUIT DESCRIPTION
DTC C1245 detects 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 the sensed current being less than the commanded current (motor spins freely). If the ABS motor is not moving, sensed current will be equal to stall currents.

CONDITIONS FOR SETTING THE DTC
DTC C1245 can set during brake motor initialization at the following speeds:
^ 0 km (0 mph) when the brake is off
^ 5 km (3 mph) when the brake is on
DTC C1245 can set during ABS stops
A malfunction exists if the EBCM detects a condition in which the EBCM cannot move the ABS motor in either direction.

ACTION TAKEN WHEN THE DTC SETS
^ A malfunction DTC stores.
^ The ABS disables.
^ The amber ABS warning indicators turn on.

CONDITIONS FOR CLEARING THE DTC
The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used. 100 drive cycles pass with no DTCs detected.

DIAGNOSTIC AIDS
The following conditions may cause an intermittent malfunction if the conditions exist in a mechanical part of the system:
^ Sticking
^ Binding
^ Slipping
Use the enhanced diagnostic function of the Scan Tool in order to measure the frequency of the malfunction. Refer to the Scan Tool manual for the procedure. DTC C1245 may set after modulator disassembly if the modulator pistons are positioned at the bottom of the modulator piston bore.
Thoroughly inspect any circuitry that may be causing the intermittent complaint for the following conditions:
^ Backed out terminals
^ Improper mating
^ Improperly formed or damaged terminals
^ Poor terminal-to-wiring connections
^ Physical damage to the wiring harness
Clear the DTCs after completing the diagnosis. Test drive the vehicle for three drive cycles in order to verify that the DTC does not reset. Use the following procedure in order to complete one drive cycle:
1. Start the vehicle.
2. Drive the vehicle over 16 km/h (10 mph).
3. Stop the vehicle.
4. Turn the ignition to the OFF position.

IMPORTANT: Zero the J 39200 test leads before making any resistance measurements.