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Home >> Kia >> 2004 >> Rio Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Fuel System >> Fuel System & Fault Isolation >> DTC Troubleshooting >> DTC P0121: Throttle Position Sensor Circuit Range Performance Problem >> Scantool Diagnostics >> Monitor Scantool Data
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Monitor Scantool Data

CAUTION: If any codes relating to TPS or MAFS are stored, do ALL REPAIRS associated with those codes before proceeding with further troubleshooting
  1. Ignition "ON" & Engine "OFF"
  2. Connect Scantool and monitor the "TPS VOLTAGE" parameter on scantool.
    1. Specification:
    1. Throttle valve fully closed: Approx. 0.2~0.8V
    2. Throttle valve fully open: Approx. 4.0~4.4V
    3. TP sensor signal should increase smoothly as throttle is opened.
      Fig 1: Display Signal Increases Proportionally With Throttle Opening Angle
      G07331596
      Fig 2: Display TPS Data
      G07331597
      Fig 3: Display TPS Data (Signal Circuit Open)
      G07331598
      Fig 4: Display TPS Data (Power Supply Circuit Open)
      G07331599
  3. Is TPS parameter near the specified value?

    YES

    1. Fault is intermittent caused by poor contact in the sensor's and/or the ECM's connector, which was repaired but ECM 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

    1. Go to "AIR LEAKAGE INSPECTION " procedure
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