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Home >> Hyundai >> 2012 >> Veracruz GLS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0109: MAP Barometric Pressure Circuit Intermittent >> Inspection Repair >> Component Inspection

Component Inspection

  1. MAPS performance test
    1. IG "OFF"
    2. Connect scantool to Data Link Connector (DLC) and select "Oscilloscope" then, connect probes to output signal lines of M***A and TPS.
    3. Start engine and monitor the waveforms accelerating or decelerating.
      1. Specification :
      PRESSURE SPECIFICATION

      Pressure (kPa) 20 35 60 95 101
      Voltage (V) 0.789 1.382 2.369 3.75 ***4
      Tolerance (V) ± 0.045
      Fig 1: MAPS And TPS Signal Waveform
      G06859736Courtesy of HYUNDAI MOTOR CO.
      Fig 2: Measuring Signal Waveform Between MAPS And TPS
      G06859737Courtesy of HYUNDAI MOTOR CO.
    4. Is the waveform displayed correctly? (Compare the response time of TPS and MAPS)

      YES

      • Substitute with a known - good PCM and check for proper operation.

      If the problem is corrected, replace PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

      NO

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