Using Voltmeter

Disconnect the throttle position sensor connector.
Measure resistance between terminal 3 (sensor ground) and terminal 1 (sensor power).
Standard value : 3.5~6.5 kΩ

Fig 1: Checking Resistance Of Throttle Position Sensor
Courtesy of HYUNDAI MOTOR CO.
If the resistance is out of standard value above, replace the throttle position sensor.
Tightening torque:

1.5~2.5 Nm (15~25 kg.cm, 1.1~1.8 lb.ft)
Connect a pointer type voltmeter between terminal 3 (sensor ground) and terminal 2 (TPS main).

Fig 2: Checking Throttle Position Sensor
Courtesy of HYUNDAI MOTOR CO.
Operate the throttle valve slowly from the idle position to the full open position and check the voltage increases smoothly in proportion with the throttle valve opening angle.
If the voltage fails to change smoothly, replace TPS.
Connect a pointer type voltmeter between terminal 3 (sensor ground) and terminal 4 (TPS sub).

Fig 3: Checking Throttle Position Sensor
Courtesy of HYUNDAI MOTOR CO.
Operate the throttle valve slowly from the idle position to the full open position and check the voltage decreases smoothly in proportion with the throttle valve opening angle
If the voltage fails to change smoothly, replace TPS.