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Home >> Kia >> 2014 >> Optima EX >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) - 2.4L (Except HEV) >> DTC P0122: Throttle/Pedal Position Sensor/Switch 'A' Circuit Low Input >> Wiring Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

■ Check for Short to Ground in Signal Circuit 

  1. IG KEY OFF.
  2. Disconnect ETC connector and PCM connector.
  3. Measure resistance between TPS1 signal terminal of ETC harness connector and chassis ground.

    Specification :  Infinite

  4. Is resistance within specification?

    YES 

    • Go to next procedure.

    NO 

■ Check for Open in Signal Circuit 

  1. IG KEY OFF.
  2. Disconnect ETC connector and PCM connector.
  3. Measure resistance between both ends of TPS1 signal line.

    Specification :  Below 1Ω.

  4. Is resistance within specification?

    YES 

    • Go to next procedure.

    NO 

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