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Home >> Hyundai >> 2011 >> Azera GLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) >> DTC P2173: Throttle Actuator Control System-High Air Flow Detected >> Inspection/Repair >> System Inspection

System Inspection

  1. Check the air hose between MAFS and throttle body is torn or installation.
  2. Check deformation, crack or installation of throttle valve(body)
  3. Has a problem been found?

    YES 

    • Substitute with a known-good Air hose or throttle body and check for proper operation. If the problem is corrected, replace air hose or throttle body and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

    • Go to "Check MAFS" as follows.
  1. IG "OFF" and install a scantool
  2. ENG "ON" and monitor "MAFS" data on the service data.
  3. Monitor signal waveform at signal terminal of MAFS with scantool.

    Specification:  Signal waveform will be displayed as follows. Frequency will be increased during acceleration. (Be aware that the signal of MAFS is not voltage display but frequency display.)

    Fig 1: Normal Waveform Of MAFS At Idle (640rpm & 13.0 kg/h)
    G07252398Courtesy of HYUNDAI MOTOR CO.
    Fig 2: Normal Waveform Of MAFS At Acceleration (2520rpm & 43.7 kg/h)
    G07252399Courtesy of HYUNDAI MOTOR CO.
  4. Are both service data and signalwave form displayed correctly?

    YES 

    NO 

    • Substitute with a known - good MAFS and check for proper operation. If the problem is corrected, replace MAFS and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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