Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Brake System Control Module
DESCRIPTION
| 1 - BSCM |
| 2 - HCU |
The Brake System Control Module (BSCM) is located in the left rear corner of the engine compartment and is secured to the Hydraulic Control Unit (HCU).
OPERATION
The Antilock Brake System (ABS) consists of the BSCM, HCU, valve body, pump motor, low pressure accumulators, inlet valves, outlet valves and noise attenuators. Accumulators in the valve body store extra fluid released from the calipers during ABS mode operation. The motor is controlled by the BSCM. The valves modulate brake pressure during an ABS event and are controlled by the BSCM. During antilock braking, the solenoid valves are opened and closed as needed. They are cycled rapidly and continuously to modulate pressure and control wheel slip and deceleration. Brake Traction Control and Electronic Stability Program modulate pressure on each wheel individually without any driver brake input. The valves are all contained in the valve body portion of the BSCM.
The BSCM is serviced separately from the HCU.
The BSCM is powered by two 50 amp fuses in the Power Distribution Center (PDC). The BSCM receives an ignition RUN/START feed from a 10 amp fuse in the PDC.
For more information on how the BSCM operates in the various braking systems. Refer to BRAKING SYSTEMS, DESCRIPTION AND OPERATION .
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.