How to check ESP(Electronic Stability Program)

2009 > G 3.3 DOHC > Brake System

ESP circuit DIAGRAM(1)

ESP circuit DIAGRAM(2)

ESP circuit DIAGRAM(3)

ESP HECU CONNECTOR INPUT / OUTPUT

Connector Terminal
Specifications
Conditions

No
Description

1
Ground(Pump)
Current range : Min-10 A
Max-20 ~ 39 A
Always

4
Ground(Valve,ECU)
Current range : Min-2.5 A
Max-5 ~ 15 A
Always

2
Supply voltage(Pump)
Battery voltage
Always

3
Supply voltage(Valve)

26
Wheel sensor voltage(FL)
Battery voltage
IG ON

9
Wheel sensor voltage(FR)

6
Wheel sensor voltage(RL)

8
Wheel sensor voltage(RR)

5
Wheel sensor signal(FL)
Voltage(High) : 0.89~1.26 V
Voltage(Low) : 0.44~0.63 V
RUNNING

10
Wheel sensor signal(FR)

27
Wheel sensor signal(RL)

29
Wheel sensor signal(RR)

11
Diagnosis Input/oupput
Voltage(High) : 0.8 * IG ON more
Voltage(Low) : 0.2 * IG ON lower
HI-SCAN Communication

28
Ignition
Battery voltage
KEY ON/OFF

31
ESP Passive switch
Voltage(High) : 0.6 * IG ON more
Voltage(Low) : 0.4 * IG ON lower
Switch ON/OFF

36
Hand brake switch
Voltage(High) : 0.7 * IG ON more
Voltage(Low) : 0.3 * IG ON lower
Switch ON/OFF

37
Yaw Rate Sensor Test
Voltage(High) : 4.1 V more
Voltage(Low) : 1 V lower
IG ON

18
Yaw Rate Sensor Reference
2.464 V ~ 2.536 V
IG ON

16
Yaw Rate Sensor Signal
Offset voltage :2.5 V
range : 0.35 V ~ 4.65 V(-100 ~ 100 °/s)
IG ON

20
Acceleration Sensor Signal
Offset voltage :2.5 V
range : 0.35 V ~ 4.65 V(-1.8 g ~ 1.8 g)
IG ON

15
Yaw Rate Sensor Ground
GND LEVEL
Always

35
CAN High
not communication:2.5 ± 0.5 V
communication :

IG ON

14
CAN Low

30
BRAKE LIGHT SWITCH
voltage(High) : 0.8 * IG ON more
voltage(Low) : 0.3 * IG ON lower
BRAKE ON/OFF

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