SRX AWD V8-4.6L VIN A (2004)
Yaw Rate Sensor: Description and Operation
ABS Description and Operation
EBCM and BPMV
BPMV Hydraulic Flow
This vehicle is equipped with the DBC7.2 antilock braking system.
The vehicle is equipped with the following braking systems:
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Antilock Brake System (ABS)
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Engine Drag Control (EDC)
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Dynamic Rear Proportioning (DRP)
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Traction Control System (TCS)
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Vehicle Stability Enhancement System (VSES) (w/JL4)
The following components are involved in the operation of the above systems:
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Electronic Brake Control Module (EBCM) - The EBCM controls the system functions and detects failures.The EBCM contains the following
components:
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System Relay - The system relay is energized when the ignition is ON and no ABS DTCs are present. It supplies battery positive voltage to the
solenoid valves and pump motor.
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Vent Tube - The vent tube, located in the EBCM connector, is an opening to the internal cavity of the EBCM. It allows ventilation of the
EBCM internals.
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Brake Pressure Modulator Valve (BPMV) - The BPMV contains the hydraulic valves and pump motor that are controlled electrically by the
EBCM. The BPMV uses a 4 circuit configuration with a diagonal split. The BPMV directs fluid from the reservoir of the master cylinder to the
left front and right rear wheels and fluid from the other reservoir to the right front and left rear wheels. The diagonal circuits are hydraulically
isolated so that a leak or malfunction in one circuit will allow continued braking ability on the other.
Important: There is a rubber isolator located under the BPMV and on the mounting studs. The rubber isolators protect the BPMV and the EBCM
from vehicle vibrations.
The BPMV contains the following components:
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Pump Motor
