Copyright by Hyundai Motor Company. All rights reserved. PA ESP

2 ESP ItemMGH 10MGH 20MGH 25MGH 40 Model ApplicationLC, XD, SMGK, FCJMEN, TQ, PA MP year 1999 (ABS) 2000 (TCS) 2001 (TCS) 2003 (ABS) 2004 (ESP) Aug (ESP) Key PointsOn-Off valve control LFC + MSC +PBA + MIRC LFC: Linear flow control MSC: Motor speed control PBA: Panic brake assist MIRC: Modified independent rear control LFC + MSC + PBA + MIRC + ROP ROP: Roll over prevention (not for PA) Comparison

3 ESP ItemsABSESP HECU Assembly Wheel speed sensor Yaw & lateral G-sensor- Pressure sensor- Built in type Steering angle sensor- Longitudinal G-sensor (4WD only) Comparison

4 ESP ESP Components

5 ESP Components of HECU MGH-40 ABS ESPCM Accumulator Pump Valve Block Solenoid Valves Motor ABSCM Pressure sensor Motor Pump Accumulator Solenoid Valves MGH-40 ESP

6 ESP On/Off LFC Slip LFC Control Range On/Off Control Range LFC (Linear Flow Control) Features

7 ESP MSC (Motor Speed Control) Features Rich brake oil flow in LPA Poor brake oil flow in LPA Motor RPM is low Motor RPM is high Wheel Pressure Vehicle Speed Wheel Speed Big Dump Wheel Pressure Wheel Speed Small Dump Vehicle Speed

8 ESP MIRC (Modified Independent Rear Control) Features - Enhancement of braking performance - Independent pressure control according to rear wheel movement (for the vehicle safety, the control is limited : pressure difference RR vs. RL is less then 20 bar) - Application : ABS, ESP

9 ESP WSS (4EA) Steering Angle Sensor Yaw rate & Lateral G- sensor (CAN) Pressure Sensor Brake Switch ESP OFF Switch ESPCM Motor Pump Solenoid Valves EPS OFF Warning Lamp ESP Function Lamp CAN Diagnosis with scan tool Engine torque reduction request Gear hold request ABS Active Signal Wheel speed information and so on. Inputs & Outputs ABS Warning Lamp EBD Warning Lamp MGH-40 ESP Longitudinal G- sensor (4WD only)

10 ESP Type: Active type (Hall effect) Power supply: 12V Air gap: 0.2~2.0mm Frequency: 1~2,500Hz Possible to detect 0km/h Not sensitive to the noise and air gap. Active Wheel Speed Sensor FrontRear

11 ESP Yaw rate & Lateral G-Sensor Power supply: 6.5~18V Signal output: CAN interface G sensor : -1.5~1.5g Yaw sensor: -75~75°/sec CAN-Hi CAN-Lo [Output Signal][Location] – Under passenger seat

12 ESP Location: Inside steering wheel Calculate the steering amount and direction 3 Input signals (ST 1, ST 2, ST N) ST N detects the neutral position of steering wheel Steering Angle Sensor Sensor type : Photo interrupt type Sensor output type : Open Collector Type Output pulse quantity :45pulse (Pulse cycle 8°) Supply voltage :IGN1(8~16V) Output voltage :1.3V OL2.0V, 3.0V OH4.1V STN Photo diode (ST1,ST2, STN) Sensor connector

13 ESP [ST1, ST2][ST1, STN] ST1 ST2 ST1 STN Output signal Steering Angle Sensor

14 ESP Checking procedure before diagnosis Before diagnosis with a scan tool, confirm the operation of warning lamps is normal. Turn the IG key OFF ON, 1. If ABS/EBD/ESP OFF lamps turn on for 3 seconds and turn off : warning lamps and ABS/ESP systems are okay] 2. If ABS/EBD/ESP OFF lamps stay off Remove the ABS/ESP Connector. IG key ON ABS/EBD stays off warning lamp circuit error check the cluster & wiring ABS/EBD stays on warning lamp circuit normal, ABS error diagnosis with HI-SCAN Diagnosis & Troubleshooting Caution during vehicle service 1. Remove the ABS/ESP connector before ECM or TCM work. (if not, CAN related DTCs will be memorized on the ESPCM) 2. Before Remove the connectors, turn the ignition off.

15 ESP Motor/Valve/Fuse check Error Code Fault TypeCauseChecking Procedure C2402 Motor Short to BAT/GND Motor Open Motor Fuse Open Motor Lock Power supply Motor fuse Defected motor 1. Check the motor power (BATT2) and fuse/wiring (10~16V) 2. Check the Chassis GND & ESPCM GND : less than 10mΩ 3. Drives over 20kph Warning lamp ON check 1 Okay Replace the HECU C2112 Valve Relay Open/Short Fuse Open Power supply Valve Relay Fuse Solenoid Valve 1. Check the valve relay power (BATT1) and fuse/wiring (10~16V) 2. Check the Chassis GND & ESPCM GND : less than 10mΩ C2380 Open/Short Leakage Current Diagnosis & Troubleshooting

16 ESP CAN check Error Code Fault TypeCauseChecking Procedure C1616 CAN Bus OFF CAN BUS 1. Check the resistance between the CAN High and the CAN Low (Normal : 60 Ω) 2. If the resistance is abnormal check the wiring condition C1611 C1612 Message Timeout No ECM message No TCM Message 1. Check the ECM and TCM connectors and wiring condition 2. Check if there are CAN related DTCs from ECM & TCM 3. Read the CAN data from TCM current data with HI-SCAN C1605 CAN H/W Fail CAN H/W Error1. Replace the HECU. Diagnosis & Troubleshooting

17 ESP Error Code Fault TypeCauseChecking Procedure C1235 Sensor Open/Short Sensor circuit1. Replace the HECU. C1237 Sensor Signal Error Sensor 1. Check if the brake light switch & brake switch & wiring is normal 2. If okay, replace the HECU. Pressure sensor check Diagnosis & Troubleshooting

18 ESP Error CodeFault TypeCaseChecking Procedure C1644 Sensor CAN BUS OFF CAN BUS 1. Check the resistance between the CAN High and the CAN Low (Normal : 60 Ω) 2. If the resistance is abnormal check the wiring condition C1643 Sensor CAN Message Timeout Sensor CAN Message 1. Check Sensor connector & wiring 2. Check the CAN signal 3. If the CAN signal is okay but problems occurs replace the sensor C1283 Abnormal Signal Offset, Noise Stick 1. Check Sensor connector & wiring 2. Check if sensor installation is okay. 3. Remove the sensor mounting bolts and IG on. Move the sensor and read the current data of HI-SCAN. 4. If problem occurs, replace the sensor C1647 Sensor CAN H/W Fail Sensor CAN H/W Replace the sensor C1282CBIT Fail Sensor Self Test Error Replace the sensor Yaw rate & Lateral G sensor Diagnosis & Troubleshooting