L322 Range Rover System Description and Operation
BRAKES
DESCRIPTION AND OPERATION
70-17
Brake Pressure Sensor
1 Brake pressure sensor
A brake pressure sensor is installed in the hydraulic unit to determine the degree of pressure build up in the braking
system. It is installed in the front axle brake circuit.
The sensor receives its power supply from the ABS ECU and produces a linear voltage input signal ranging from 0.5
to 4.5 volts depending on the brake pressure in the circuit.
The brake pressure sensor is used for emergency brake assist and to calculate brake torque applied to each wheel
for all DSC functions. Torque is calculated using engine torque from the ECM, gear selected from the EAT ECU and
range selected from the transfer box ECU. The sensor is also used for brake temperature calculation.
