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Home >> Hyundai >> 2002 >> XG350 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> Diagnostic Tests >> DTC P0122: Throttle Pedal Position Sensor A Circuit Low Input >> Scantool Diagnostics >> Monitor Scantool Data
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Monitor Scantool Data

  1. Install Scantool and monitor the "TPS 2 (Sub) or TP Sensor (ECM)" parameter on scantool.
    1. Test Condition: Ignition "ON" & Engine "OFF".
    2. Specification:

      Throttle valve fully closed: approx. 4.0~4.7V

      Throttle valve fully open: approx. 0.1~1.0V

      TPS signal should decrease smoothly as throttle is opened.

      Fig 1: Scantool Screen Display - TPS Signal Waveforms At Accelerating And Decelerating - (1) TPS2 And (2) TPS1
      G07325536Courtesy of HYUNDAI MOTOR CO.
      Fig 2: Scantool Screen Display - TPS Signal Output With Throttle Valve Fully Closed
      G07325537Courtesy of HYUNDAI MOTOR CO.
      Fig 3: Scantool Screen Display - TPS Signal Output With Throttle Valve Fully Open
      G07325538Courtesy of HYUNDAI MOTOR CO.
  2. Is TPS signal within specifications?

    YES

    • Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO

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