General Information

Component Location





General Description

The pressure sensor, installed in the HECU, sense the brake oil pressure to judge driver's brake intention when ESC is operating.
If pressure of master cylinder is applied to pressure sensor, the strain of the piezo element is changed and then the resistance of bridge circuit is changed according to changed strain.
Therefore this changed resistance changes output voltage of bridge circuit and output voltage changes linearly.
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





Diagnostic Circuit Diagram