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Home >> Hyundai >> 2017 >> Elantra GT Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0123: Throttle Position Sensor 1 Signal Circuit High Input >> Wiring Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

  1. IG "OFF".
  2. Disconnect ETC Motor & TPS connector.
  3. IG "ON" & ENG "OFF".
  4. Measure the voltage between TPS 1 signal terminal of ETC/PCM Motor & TPS harness connector and chassis ground.

    Specification:  Approx. 5V

  5. Is the measured voltage within specification?

    YES 

    NO