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Home >> Hyundai >> 2004 >> Elantra GLS, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> DTC Trouble Shooting Procedures >> DTC P0123: Throttle Position Sensor Circuit High Input >> Inspection Procedures >> 5. Check For Open In Harness
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5. Check For Open In Harness

  1. Turn ignition switch to OFF position.
  2. Disconnect ECM connector.
  3. Measure resistance of TPS ground harness between terminal 2 of the TPS harness connector and terminal 38 of the ECM harness connector.
  4. Measure resistance of TPS signal harness between terminal 1 of the TPS harness connector and terminal 32 of the ECM harness connector.
    Fig 1: Checking TPS Harness For Open Circuit
    G00749209Courtesy of HYUNDAI MOTOR CO.
    • Specification: below 1Ω 

Does each resistance indicate continuity? 

Yes: Go to next step.

No: Repair open in harness.