Esp Operation Mode: Notes

ESP Non-operation-Normal braking.

Fig 1: Identifying ESP Non-Operation-Normal Braking

Courtesy of HYUNDAI MOTOR CO.

SOLENOID VALVE SPECIFICATIONS

Solenoid valve	Continuity	Valve	Motor pump	TC Valve
IN (NO)	OFF	OPEN	OFF	OFF
OUT (NC)	OFF	CLOSE

Operation  In this position, the inlet valve and the TCS valve are open, the electrically operated shuttle valve and the outlet valve are closed.

*ESV: Electric reversing valve.

ESP operation

Fig 2: Identifying ESP Operation

Courtesy of HYUNDAI MOTOR CO.

SOLENOID VALVE SPECIFICATION

Solenoid valve		Continuity	Valve	Motor pump	TC Valve
Understeering (Only inside of rear wheel)	IN(NO)	OFF	OPEN	ON	ON
	OUT(NC)	OFF	CLOSE
Oversteering (Only outside of front wheel)	IN(NO)	OFF	OPEN
	OUT(NC)	OFF	CLOSE

Operation  The on/off booster builds up a pressure of approx. 10 bar in order to enable the ESP pump to suck brake fluid at low temperatures. In this position, the inlet valve is driven in a pulsed cycle. The TCS valve is closed. The outlet valve remains closed. The electrically operated shuttle valve is opened. The hydraulic pressure is led to the wheel brakes which are to be applied for a brief period of time.