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Home >> Kia >> 2014 >> Optima LX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) - 2.4L (Except HEV) >> DTC P2123: Throttle/Pedal Position Sensor/Switch 'D' Circuit High Input >> Wiring Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

■ Check for Short to Power in Signal circuit 

  1. IG KEY OFF.
  2. Disconnect APS harness connector.
  3. IG KEY ON.
  4. Measure voltage between APS1 signal terminal of APS harness connector and chassis ground.

    Specification :  Approx. 0V

  5. Is voltage within specification?

    YES 

    • Go to next procedure.

    NO 

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