Esc (Electronic Stability Control): Other Kia Sorento I рестайлинг

VARIANT CODING

The HECU is programmed with a variant code based on the vehicle powertrain configuration. This variant code is used to determine the appropriate ESC calculations. Variant code programming should be performed whenever an HECU is replaced.

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1. Connect the scan tool to the data link connector located underneath the dash panel. Turn ign key to the ON position
2. Select vehicle name.
3. Select ANTI-LOCK BRAKE SYSTEM.
4. Select the variant coding.
5. Follow the next procedure according to the comment
6. Confirm the condition, and then push the "REST".
7. If the procedure is finished, the screen is displayed as shown below.
8. IGN off.
9. IGN on.
10. The variant coding is completed. CAUTION: If the warning lamp (ESC, EBD, ABS) is illuminated, follow the "Variant coding" again. For the vehicle equipped 4WD, delete the DTC(s) memorized in 4WD ECU when variant coding Is completed.

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1. STEP 1 The ESC analyzes the intention of the driver.
2. STEP 2 It analyzes the movement of the ESC vehicle.
3. STEP 3 The HECU calculates the required strategy, then actuates the appropriate valves and sends torque control requests via CAN to maintain vehicle stability.

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1. ESC Non-operation-Normal braking. ESC OPERATION MODE Inlet valve (EV) Outlet valve (AV) Pilot valve (USV) High pressure switch valve (HSV) Pump motor Normal braking Open Close Open Close OFF
2. ESC INCREASE MODE ESC INCREASE MODE Inlet valve (EV) Outlet valve (AV) Pilot valve (USV) High pressure switch valve (HSV) Pump motor Normal braking Open Close Close (Partial) Open ON (Motor speed control)
3. ESC HOLD MODE (FR is only controlled.) ESC HOLD MODE (FR CONTROLLED) Inlet valve (EV) Outlet valve (AV) Pilot valve (USV) High pressure switch valve (HSV) Pump motor Normal braking Close Close Close (Partial) Open ON (Motor speed low control)
4. ESC DECREASE MODE (FR is only controlled) ESC DECREASE MODE (FR CONTROLLED) Inlet valve (EV) Outlet valve (AV) Pilot valve (USV) High pressure switch valve (HSV) Pump motor Normal braking Close Open Close (Partial) Open ON (Motor speed low control)

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ABS WARNING LAMP MODULE

The active ABS warning lamp module indicates the self-test and failure status of the ABS The ABS warning lamp may be on

1. During the initialization phase after IGN ON. (continuously 3 seconds).
2. In the event of inhibition of ABS functions by failure.
3. During diagnostic mode.
4. When the ECU Connector is separated from ECU.

EBD/PARKING BRAKE WARNING LAMP MODULE

The active EBD warning lamp module indicates the self-test and failure status of the EBD. However, in case the Parking Brake Switch is turned on, the EBD warning lamp is always turned on regardless of EBD functions. The EBD warning lamp shall be on

1. During the initialization phase after IGN ON (continuously 3 seconds).
2. When the Parking Brake Switch is ON or brake fluid level is low.
3. When the EBD function is out of order.
4. During diagnostic mode.
5. When the ECU Connector is separated from ECU.

ESC WARNING LAMP (ESC SYSTEM)

The ESC warning lamp indicates the self-test and failure status of the ESC.

The ESC warning lamp may be turned on under the following conditions

1. During the initialization phase after IGN ON. (continuously 3 seconds).
2. In the event of inhibition of ESC functions by failure.
3. When driver turn off the ESC function by on/off switch.
4. During diagnostic mode.

ESC FUNCTION LAMP (ESC SYSTEM)

The ESC function lamp indicates the self-test and operating status of the ESC.

The ESC Function lamp operates under the following conditions

1. During the initialization phase after IGN ON (continuously 3 seconds).
2. When the ESC control is operating (Blinking - 2Hz)

ESC ON/OFF SWITCH (ESC SYSTEM)

The ESC On/Off Switch shall be used to toggle the ESC function between On/Off states based upon driver input. The On/Off switch shall be a normally open, momentary contact switch.

Initial status of the ESC function is on and the switch is used to request an ESC status change.

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ESC HECU CONNECTOR TERMINALS REFERENCE Connector Terminal Specifications Conditions No Description 1 Ground (Pump) Current range: Min-10 A Max-20 to 39 A Always 4 Ground (Valve, ECU) Current range: Min-2.5 A Max-5 to 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/output Voltage (High): 0.8 * IG ON more Voltage (Low): 0.2 * IG ON lower SCAN TOOL Communication 28 Ignition Battery voltage KEY ON/OFF 31 ESC Passive switch Voltage (High): 0.6 * IG ON more Voltage (Low): 0.4 * 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 to 2.536 V IG ON 16 Yaw Rate Sensor Signal Offset voltage: 2.5 V range : 0.35- 4.65 V(-100 to 100° /s) IG ON 20 Acceleration Sensor Signal Offset voltage: 2.5 V range : 0.35- 4.65 V(-1.8 g to 1.8 g) IG ON 15 Yaw Rate Sensor Ground GND LEVEL Always 35 CAN High 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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MEMORY OF FAIL CODE

1. It keeps the code as far as the backup lamp power is connected. (O)
2. It keeps the code as long as the HCU power is on. (X)

FAILURE CHECKUP

1. Initial checkup is performed immediately after the HECU power on.
2. Valve relay checkup is performed immediately after the IG2 ON.
3. It executes the checkup all the time while the IG2 power is on.
4. Initial checkup is made in the following cases. When no failure is detected When ABS and ESC are not in control. Initial checkup is not made after ECU power on. If the vehicle speed is over 8 km/h (5 mph) when the brake lamp switch is off. When the vehicle speed is over 40 km/h (24.9 mph).
5. Though, it keeps on checkup even if the brake lamp switch is on.
6. When performing ABS or ESC control before the initial checkup, stop the initial checkup and wait for the HECU power input again.
7. Judge failure in the following cases. When the power is normal. From the point in which the vehicle speed reaches 8 km/h (5.0 mph) after HECU power on.

COUNTERMEASURES IN FAIL

1. Shut the system down and perform the following actions and wait for HECU power OFF.
2. Turn the valve relay off.
3. Do not perform any ABS/TCS/ESC functions until normal operating condition is restored.

WARNING LAMP ON

1. ABS warning lamp turns on when ABS is malfunctioning.
2. ESC operation lamp turns on when ESC is malfunctioning.

When power voltage and valve relay voltage are abnormal, input/output related failure judgment is not made.

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1. The yaw-rate & lateral G sensor is applied for the ESC system.
2. The yaw-rate is the angular velocity, when a vehicle turns a corner, and the lateral G is the acceleration to move a vehicle out of the way when cornering.
3. The sensor is located in the crash pad lower floor on vehicle.

GENERAL DATA

The steering angle speed sensor detects the angle of the steering wheel in order to which direction a user chooses.

MEASURING PRINCIPLE

A non contact, analog angle sensor carrying out absolute measuring by the use of the Anisotropic-Magneto-Resistive effect (AMR). Measuring of the absolute angle by means of a toothed measuring gear with magnetic properties in combination with different ratios. Corresponding AMR elements that change their electrical resistance according to the magnetic field direction detect the angle position of the measuring gears. A micro-controller decodes the measured voltage signals after A/D converting with the help of a mathematical function. Output of the digital angle value and velocity via CAN-interface.