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Home >> Kia >> 2016 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis - 2.4L (1 Of 3) - Optima (Except HEV) >> DTC P0123-00: Throttle Position Sensor 1 Signal Circuit High Input >> Wiring Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

  1. Ignition "OFF".
  2. Refer to "ETC (ELECTRONIC THROTTLE CONTROL) SYSTEM " and disconnect Throttle Body connector.
  3. Ignition "ON".
  4. Measure voltage between Pin No. 4 (TPS1 Signal) terminal of Throttle Body harness connector and chassis ground.

    Specification:  Approx. 4 V

  5. Ignition "OFF".
  6. Disconnect Battery (-) terminal.
  7. Refer to "ETC (ELECTRONIC THROTTLE CONTROL) SYSTEM and ENGINE CONTROL MODULE (ECM) " and disconnect Throttle Body and PCM connector.
  8. Measure resistance between Pin No. 4 (TPS1 Signal) terminal of Throttle Body harness connector and Pin No. 96 (TPS1 Signal) harness connector.

    Specification:  Approx. below 1 Ω

  9. Is the measured value within specification?

    YES 

    NO 

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