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Home >> Hyundai >> 2012 >> Elantra GLS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 2) >> DTC P2127: Throttle/Pedal Position Sensor/Switch E Circuit Low Input >> Inspection/Repair >> W/Harness Inspection >> Signal Circuit Inspection
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Signal Circuit Inspection

  1. IG KEY OFF.
  2. Disconnect PCM and APS harness connector.
  3. IG KEY ON.
  4. Measure resistance between APS2 signal terminal of APS harness connector and chassis ground.

    Specification:  Infinite

    Fig 1: Measuring Resistance Between APS2 Signal Terminal Of APS Connector And Chassis Ground.
    G07272812Courtesy of HYUNDAI MOTOR CO.
  5. Is resistance within specification?

    YES 

    • Go to next procedure.

    NO 

  1. IG KEY OFF.
  2. Disconnect APS harness connector and PCM harness connector.
  3. Measure resistance between both ends of APS2 signal line.

    Specification:  Below 1Ω.

    Fig 2: Measuring Resistance Between Both Ends Of APS2 Signal Line.
    G07272813Courtesy of HYUNDAI MOTOR CO.
  4. Is resistance within specification?

    YES 

    • Go to next procedure.

    NO