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Home >> Hyundai >> 2015 >> Sonata Eco >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 57 (Engine Control System Diagnosis (2 Of 2) (HEV)) >> DTC P2122: Throttle/Pedal Position Sensor/Switch 'D' Circuit Low Input >> W/Harness Inspection >> Signal Circuit Inspection

Signal Circuit Inspection

WARNING: This page is about a different variant/trim than selected.

■ Check for Short to Ground in Signal Circuit 

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

    Specification:  Infinite

    Fig 1: Measuring Resistance Between APS1 Signal Terminal Of APS Harness Connector And Chassis Ground
    G10606888Courtesy of HYUNDAI MOTOR AMERICA
  5. Is resistance within specification?

    YES 

    • Go to next procedure.

    NO 

■ Check for Open in Signal circuit 

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

    Specification:  Below 1Ω.

    Fig 2: Measuring Resistance Between Both Ends Of APS1 Signal Line
    G10606889Courtesy of HYUNDAI MOTOR AMERICA
  4. Is resistance within specification?

    YES 

    • Go to next procedure.

    NO 

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