July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

ESC Operation Mode

STEP 1
The ESC analyzes the intention of the driver.

Fig 1: ESC Operation Diagram (STEP 1)
Courtesy of KIA MOTORS AMERICA, INC.
STEP 2
It analyzes the movement of the ESC vehicle.

Fig 2: ESC Operation Diagram (STEP 2)
Courtesy of KIA MOTORS AMERICA, INC.
STEP 3
The HECU calculates the required strategy, then actuates the appropriate valves and sends torque control requests via CAN to maintain vehicle stability.

ESC Non-operation-Normal braking.

	Inlet valve (IV)	Outlet valve (OV)	Traction Control Valve (TCV)	High pressure switch valve (HSV)	Return pump
Normal braking	Open	Close	Open	Close	OFF

Fig 1: ESC - Circuit Diagram (ESC Non-Operation-Normal Braking)

G09773575

Courtesy of KIA MOTORS AMERICA, INC.

NOTE: IV: Inlet Valve
OV: Outlet Valve
RL: Rear left wheel
FR: Front right wheel
FL: Front left wheel
RR: Rear right wheel
RP: Return pump
TCV: Traction Control Valve
HSV: High Pressure Switch Value

ESC Increase Mode

	Inlet valve (IV)	Outlet valve (OV)	Traction Control Valve (TCV)	High pressure switch valve (HSV)	Return pump
Normal braking	Open	Close	Close (Partial)	Open	ON (Motor speed control)

Fig 2: ESC - Circuit Diagram (ESC Increase Mode)

G09773576

Courtesy of KIA MOTORS AMERICA, INC.

NOTE: IV: Inlet Valve
OV: Outlet Valve
RL: Rear left wheel
FR: Front right wheel
FL: Front left wheel
RR: Rear right wheel
RP: Return pump
TCV: Traction Control Valve
HSV: High pressure Switch Valve

ESC Hold Mode (FR is only controlled.)

	Inlet valve (IV)	Outlet valve (OV)	Traction Control Valve (TCV)	High pressure switch valve (HSV)	Return pump
Normal braking	Close	Close	Close (Partial)	Open	OFF

Fig 3: ESC - Circuit Diagram (ESC Hold Mode FR Only Controlled)

G09773577

Courtesy of KIA MOTORS AMERICA, INC.

NOTE: IV: Inlet Valve
OV: Outlet Valve
RL: Rear left wheel
FR: Front right wheel
FL: Front left wheel
RR: Rear right wheel
RP: Return pump
TCV: Traction Control Valve
HSV: High pressure Switch Valve

ESC Decrease Mode (FR is only controlled)

	Inlet valve (IV)	Outlet valve (OV)	Traction Control Valve (TCV)	High pressure switch valve (HSV)	Return pump
Normal braking	Close	Open	Close (Partial)	Open	ON (Motor speed low control)

Fig 4: ESC - Circuit Diagram (ESC Decrease Mode FR Only Controlled)

G09773578

Courtesy of KIA MOTORS AMERICA, INC.

NOTE: IV: Inlet Valve
OV: Outlet Valve
RL: Rear left wheel
FR: Front right wheel
FL: Front left wheel
RR: Rear right wheel
RP: Return pump
TCV: Traction Control Valve
HSV: High pressure Switch Valve

Fig 5: Identifying ESC/ABS And EBD/Parking Brake Warning Lamp

G09773579

Courtesy of KIA MOTORS AMERICA, INC.