Hyundai Tiburon (2003 year). Manual — part 84

A. Traction: Lower vibration and higher launchability, accelerationand climbability by slip control.

B. Cornering and passing: Stable cornering and passing.

C. Steering stability: Control traction force traverse vector prior to provide easy turning when turning the steering wheel.

2. General TCS features

A. Improved drivability. Minor operation of acceleration is not necessary in launching and acceleration on slippery road.

B. More stable cornering by stable acceleration on normal road condition.

C. TCS system will compare vehicle speed received from rear wheel speed sensor and driving wheel speed from front

wheel speed sensor on slippery road condition, and provide optimum slipping rate of driving wheels.

FULL TRACTION CONTROL SYSTEM (FTCS)

1. The ABS control module (HECU) controls TCS control too.

2. HECU will compare signals from front (driving) and rear wheel speed sensors to detect driving wheels slip.

3. Upon detecting driving wheels slip, HECU will perform TCS control. The TCS control will include brake TCS (BTCS)

control.

4. HECU will transmit engine torque reduction request, fuel cut cylinder number, and TCS control request signals in

accordance with slip level to engine ECM and TCM through BUS line which will provide CAN communication for TCS
control.

5. Engine ECM will perform fuel cut as requested by HECU and retard ignition timing as per engine torque reduction

request signal.

6. TCM will hold shift position by TCS control time according to TCS operation signal. Then enhanced acceleration by

kick-down will not occur.

BRAKE TRACTION CONTROL SYSTEM (BTCS)

1. On TCS control, only brake control will be performed. (engine and TCM control will not happen)

2. Controlled by motor pump output pressure.

EBD (ELECTRONIC BRAKE-FORCE DISTRIBUTION) OPERATION

ADVANTAGES

- Function improvement of the base-brake system.

- Compensation for the different friction coefficients.

- Elimination of the proportioning valve.

- Failure recognition by the warning lamp.

FAIL SAFE

Comparison between Proportioning valve and EBD

FAIL CAUSE

SYSTEM

WARNING LAMP

ABS

EBD

ABS

EBD

None

ON

ON

OFF

OFF

1-Wheel speed sensor failure

OFF

ON

ON

OFF

Pump malfunction

OFF

ON

ON

OFF

Low voltage

OFF

ON

ON

OFF

2 or more wheel speed sensor failure

Solenoid valve failure

HECU malfunction

Valve relay failure

Over voltage

Other failure

OFF

OFF

ON

ON

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COMPONENTS

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TROUBLESHOOTING

STANDARD FLOW OF DIAGNOSTIC TROUBLESHOOTING

NOTES WITH REGARD TO DIAGNOSIS

Phenomenon

Explanation

System check sound

When starting the engine, a thudding sound can sometimes be heard coming from
inside the engine compartment. This is because the system operation checkis being
performed.

ABS operation sound

1. Sound of the motor inside the ABS hydraulic unit operation (whine).

2. Sound is generated along with vibration of the brake pedal (scraping).

3. When ABS operates, sound is generated from the vehicle chassis due torepeated

brake application and release
(Thump : suspension; squeak: tires)

ABS operation (Longbraking
distance)

For road surfaces such as snow-covered and gravel roads, the braking distance for
vehicles with ABS can sometimes be longer than that for other vehicles. Accordingly,
advisethe customer to drive safely on such roads by lowering the vehicle speed.

Pedal kick back

Pedal kick back is normal operation.

Diagnosis detection conditions can vary depending on the diagnosis code. When checking the trouble symptom after the
diagnosis code has been erased,ensure that the requirements listed in "Comment" are met.

ABS CHECK SHEET