General Information

Component Location





General Description

The one pressure sensor, installed in the master cylinder, sense the brake oil pressure to judge driver's brake intention when ESC is operating.
There are movable and unmovable ceramic disk in pressure sensor.
When the pressure is applied to the disk, the distance between the disks changes.
Therefore the distance between the disks changes linearly when the pressure is applied to the movable disk by break operation.
Max. measurable pressure is 170 bar.
The sensor output is a analog signal in proportion to supply voltage, and the HECU recognizes a pressure value according to signal ratio about supply voltage.

DTC Description

The failure is detected if the pressure sensor signal noise is out of normal range, or the pressure sensor signal is changed abnormally.
In spite of no brake switch signal, master cylinder pressure exceeds 20 bar when brake switch is normal.

DTC Detecting Condition





Schematic Diagram





Signal Waveform