LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Kia >> 2011 >> Optima LX, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) - 2.4L >> DTC P2123: Throttle Pedal Position Sensor/Switch 'D' Circuit High Input >> Inspection/Repair >> W/Harness Inspection >> Ground Circuit Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Ground Circuit Inspection

■ Check for Open in Ground circuit 

  1. IG KEY OFF.
  2. Disconnect APS harness connector and PCM harness connector.
  3. Measure resistance between both ends of APS1 ground line.

    Specification :  Below 1Ω

    Fig 1: Measuring Resistance Between Both Ends Of APS1 Ground Line
    G07386861Courtesy of KIA MOTORS AMERICA, INC.
  4. Is resistance within specification?

    YES 

    • Go to next procedure.

    NO