CM ESP/ESC (Bosch 8)

2 Variation Line-up (BOSCH 8 ABS/ESP) S: Standard, O: Option

3 COMPONENTS OF ESP SYSTEM

4 VARIANT CODING Perform the variant coding if there is a ESP OFF W/L on with a C1702 (Variant Coding Error) after replacing a ECM,TCM or ESPCM.

5 Construction HYDRAULIC CONTROL UNIT Solenoid Valve (x12) Valve Coil (x12) Low Pressure Chamber Piston (x2) Pump (x2) Motor Pressure Sensor ESPCM

6 Prevent a pressure overshoot or undershoot Control range decrease - Noise : Pulse-Up Noise decrease - Enhanced Pedal Feeling On/Off LFC Slip LFC Control Range On/Off Control Range Effect of LFC (Linear Flow Control) LFC (Linear Flow Control)

7 ACTUATION TEST PWM control ON/OFF control

8 HECU Pressure sensor Operating condition HYDRAULIC BRAKE ASSIST - over 30 bar - over 2,200 bar/sec - over 20 km/h

9 INPUTS AND OUTPUTS Pressure Sensor (HCU Built-in type)

10 ACTIVE WHEEL SPEED SENSOR - Type: Hall Effect - Output signal: Digital (Open Collector Type circuit integrated) - Good characteristics against temperature variation and noise - Low RPM Detection: 0 RPM can be detected - Air gap sensitivity: stable output pulse against air-gap change -Supplying power: DC 12V

11 ACTIVE WHEEL SPEED SENSOR Inspection Teeth: 48 12VGND Battery R(100Ω) Oscilloscope V high = 1.2~1.7V V low = 0.6~0.8V

12 YAW RATE & LATERAL G SENSOR Appearance

13 Sensor specification a. Yaw Rate Sensor Specification Measuring Range : ±100˚/s Resolution : 0.3˚/s Output Voltage Range : 0.5 ~ 4.5V Sensitivity : 18 mV / (°/s) b. Lateral G (Acceleration) Sensor Specification Measuring Range : ±1.8 g (±1.5G) Resolution : 0,005 g Output Voltage Range : 0.5 ~ 4.5 V Sensitivity : 1V/g YAW RATE & LATERAL G SENSOR

14 Pin layout [Sensor connector - Male side] YAW RATE & LATERAL G SENSOR

15 Sensor Output [Pin1- Reference voltage of the sensor][Pin2- Bite : for self test] IG ON YAW RATE & LATERAL G SENSOR

16 Sensor Output [Pin4 - Output of Yaw Rate][Pin3 - sensor power] YAW RATE & LATERAL G SENSOR

17 Sensor Output [Pin5 - Lateral G sensor output][Lateral G sensor output: 90˚ to the right] YAW RATE & LATERAL G SENSOR

18 Sensor self-test (Yaw rate sensor) Pin2 - Bite Pin 4- Yaw rate sensor output YAW RATE & LATERAL G SENSOR

19 Sensor self-test (Lateral G sensor) Pin2 - Bite Pin 5- Lateral G sensor output YAW RATE & LATERAL G SENSOR

20 Current data & DTC YAW RATE & LATERAL G SENSOR

21 C1282 (Reference voltage/Yaw/Lateral G Sensor short to GND) Current data & DTC YAW RATE & LATERAL G SENSOR

22 C1283 (BITE short to GND) Current data & DTC YAW RATE & LATERAL G SENSOR

23 [When the BITE(Pin2) short to GND] Current data & DTC [When the BITE is normal] Lateral G sensor output YAW RATE & LATERAL G SENSOR

24 Current data & DTC Yaw rate sensor output [When the BITE(Pin2) short to GND] [When the BITE is normal] 2.5V without wave pattern YAW RATE & LATERAL G SENSOR

25 STEERING ANGLE SENSOR Appearance Maker : RUF (Germany) Installation : Steering wheel

26 Hi-scan data STEERING ANGLE SENSOR

27 Steering angle calibration Suspension analysis for steering angle calibration or wheel in straight-ahead position. A prolonged straight-ahead drive can also be used during calibration to determine the steering wheel center position. Calibration of the wheel angle sensor in straight-ahead position. (An incorrect calibration will set a fault code in the fault code memory.) ±5° or less STEERING ANGLE SENSOR

28 Steering angle calibration - Steering angle sensor calibration : After SAS replacement or clock spring replacement STEERING ANGLE SENSOR

29 PRESSURE SENSOR Operating Voltage : 5± 0.25 V Output voltage : 10% ~ 90% V pwr Operating Pressure : 0 ~ 200 bar Response time : Max. 10msec Operational Temp. : - 40 ~ 125 Specification