ESC (MGH 60) Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company.

2 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. ItemMGH 10MGH 25MGH 40MGH 60 Model ApplicationLC, XD, SRGK F/L, MC, JM, FC F/LMC F/L, EN, PA LM, PA, MC, EN, RB HG, SO, MD, FS, YF HEV, DM MP year 1999 (ABS) 2000 (TCS) 2003 (ABS) 2004 (ESC) Aug (ESC)Oct (ESC) Key Points On-Off valve control LFC + MSC +PBA LFC: Linear flow control MSC: Motor speed control PBA: Panic brake assist LFC + MSC + PBA + MFC + Add Function ROP: Roll Over Prevention HAC: Hill start Assist Control DBC: Downhill Brake Control Yaw rate with 1G + Stand alone 1G (for 4WD or HAC/DBC) Yaw rate with 2G ESC line-up

3 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Comparison ItemsMGH 60 (ABS)MGH 60 (ESC) HECU Assembly Wheel speed sensor Yaw & 2G sensor- Pressure sensor- Steering angle sensor- Longitudinal G-sensor- HAC-Applied DBC-Applied Absolute angle type (w/4WD) Built in type

4 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Modulator Assembly ABS Modulator Assembly ESC ESCCM Solenoid Valves Valve Block Motor Pump Accumulator Pressure sensor Accumulator Pump Valve Block Solenoid Valves Motor ABSCM Components of HECU

5 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. - Prevention of vehicle roll-over - Extended logic of ESC - Function inhibited when ESC OFF switch ON - Input : yaw rate, lateral G sensor signal - Output : brake control, engine torque control - Application : ESC is essential to implement ROP ROP ONROP OFF Test condition - on the dry asphalt - vehicle speed : 120~180km/h ROP (Roll Over Prevention) Features

6 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Without HACWith HAC HAC (Hill start Assist Control) Concept : Detects vehicle stop on slope. Keeps the fixed brake pressure depending on slope degree. Function : Prevent roll back at start at uphill (or downhill). System : ESC H/W (HECU + Sensors) Input: Longitudinal G Sensor, Accelerator & Brake pedal S/W

7 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. DBC (Downhill Brake Control) Function Keep the same speed when the vehicle go down on the hill without step on the brake pedal. Input : Longitudinal G-sensor, DBC S/W, Accelerator & Brake pedal S/W Output : Brake pressure DBC Switch 8kph constant

8 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. WSS (4EA) Steering Angle Sensor Yaw rate & 2 G- sensors Pressure Sensor (embedded in HECU) Longitudinal G-Sensor (ABS/4WD only) Brake Switch B/Up lamp S/W (M/T only for HAC) ESCCM Motor Pump Solenoid Valves CAN ABS Active Signal (4WD) Engine torque reduction request Gear hold request (TCM) Wheel speed information (4WD) Vehicle speed Inputs & Outputs DBC Relay Chassis-CAN CAN (Local) Warning lamp control - DBC lamp - ESC OFF / ESC lamp - ABS / EBD lamp Cluster ESC OFF Switch Clutch S/W (M/T only for HAC)

9 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Active Wheel Speed Sensor Type: Active type (Hall effect) - Power supply: 12V - Air gap: 0.2~2.0mm - Possible to detect 0km/h - Not sensitive to the noise and air gap.

10 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Vehicle Front Longitudinal G Vehicle Front [Location] Longitudinal G Sensor (ABS/4WD only)

11 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. - Power supply: 6.5~18V - Signal output: CAN (Local) interface - G sensor : -1.5~1.5g - Yaw sensor: -75~75°/sec CAN-Hi CAN-Lo [Output Signal] Yaw rate & Two G-Sensor [Location: Under center console]

12 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Steering Angle Sensor Type - Contact-less type - Outputs via CAN (Chassis) interface - Range: -780˚ ~ + 780˚ [SAS] IGN GND SAS ESC CAN HI CAN LOW

13 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. DBC Relay ESC Control Module DBC Switch DBC relay ICM relay box Brake Switch Hot at all timesHot at IG ON To brake lamp circuit To illumination circuit

14 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. Function : Show to be system state both malfunction and operation Warning Lamp Turns on with green color: DBC Stand by upon pressing DBC switch. Turns on with red color: - Initial check (3sec) - During diagnosis - ESC failure - DBC relay failure ESC OFF lamp Blinks with green color: DBC is being operated. ESC lamp EBD warning lamp CategoryConditionOther modelsLM, PB… ESC lamp When ESC functionsBlinks ESC system failure-Turns on ESC OFF lamp ESC OFF S/W ONTurns on ESC system failureTurns on - ABS warning lamp

15 ESC Copyright 2009 All rights reserved. No part of this material may be reproduced, stored in any retrieval system or transmitted in any form or by any means without the written permission of Hyundai Motor Company. The calibration of Longitudinal G-Sensor When do this? After replacing following components ! Yaw rate & Two G-sensorsHECU OR When do this? if you have a DTC (C1285, longitudinal G-sensor not calibrated) Level ground: Less than 15%