Accelerator Position Sensor (APS)

Disconnect APS connector and turn ignition switch on.
Measure voltage between the terminals 2 and 5 of APS connector as below.
Specification(APS1)

Not depressed : 0.58 ~ 0.93V

Depressed fully : 3.85 ~ 4.35V

Fig 1: Measuring Voltage Between Terminals 2 And 5 Of APS Connector
Courtesy of HYUNDAI MOTOR CO.
Measure voltage between the terminals 3 and 6 of APS connector as below.
Specification(APS2)

Not depressed : 0.29 ~ 0.46V

Depressed: fully : 1.93 ~ 2.18V

Fig 2: Measuring Voltage Between Terminals 3 And 6 Of APS Connector
Courtesy of HYUNDAI MOTOR CO.