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Home >> Kia >> 2017 >> Forte EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L GDI (3 Of 3) >> DTC P2127: Accelerator Position Sensor 2 Signal Circuit Low Input >> Component Inspection

Component Inspection

■ Check APS 

  1. IG "OFF" and install a GDS.
  2. Connect probe to APS1 and APS2 to check signal waveform by using oscilloscope function.
  3. Measure signal waveform of APS by pressing and depressing accelerator pedal.

    Specification:  Signal waveform will be displayed as follows.

  4. Is the measured signal waveform O.K?

    YES 

    • Substitute with a known - good ECM/PCM and check for proper operation. If the problem is corrected, replace ECM/PCM 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.
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