SSANGYONG Kyron Repair Manual page 421

Description
The sensor consists of two ceramic
disks, one of which is stationary and
the other movable. The distance be-
tween these disks changes when
pressure is applied.
Pressure Sensor Circuit
Ground
1
Power
2
3
Signal output
< Primary pressure
sensor >
Ground
1
Power
2
3
Signal output
< Secondary
pressure sensor >
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
Master
cylinder
Brake not
applied
The pressure sensors operate on the
principle of changing capacitance
(a).
The distance (S) between the disks
and, thus, the capacitance changes
when pressure is applied to the mov-
able disk by a braking intervention.
The voltage value is approx. 0.5 V
when the brake is not operated.
The ESP unit supplies around 5V power to two pres-
sure sensors installed on the ESP system when the
ignition switch is ON.
19
20 Each sensor's pin no. 1 is its ground and pin no. 3
18
outputs the sensor output voltage to the ESP unit. When
the brake is not in operation, this voltage is about 0.5V
and, during the brake operation it increases linearly to
about 0.5 ~ 4.75V.
21
23
HBA operating conditions:
22
1. Pressure: 20 bar
2. Pressure changes: over 1500 bar/sec
< ESP unit >
3. Vehicle speed: over 7 km/h
4890
cylinder
applied
When brake pressure is applied
from the master cylinder, the ce-
ramic disk moves towards the fixed
ceramic disk and the electric
charge volume changes accordingly.
The voltage value is linearly changed
from 0.5 V (brake not applied) to 4.
75 V (brake applied).
ABS/ESP SYSTEM
KYRON SM - 2005.09
35
Master
Brake