Component Inspection

IG "OFF" and install a GDS.
Connect probe to APS1 and APS2 to check signal waveform by using oscilloscope function.
Measure signal waveform of APS by pressing and depressing accelerator pedal.
Specification: Signal waveform will be displayed as follows.

Fig 1: Measuring Signal Waveform Of APS
Courtesy of HYUNDAI MOTOR AMERICA

Fig 2: APS And ECM Connector Terminals
Courtesy of HYUNDAI MOTOR AMERICA
Is the measured signal waveform OK?
YES
- Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Substitute with a known-good APS and check for proper operation. If the problem is corrected, replace APS and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.