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Home >> Hyundai >> 2012 >> Elantra Touring SE, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures >> Inspection Chart For Diagnostic Trouble Codes (DTC) >> P0123: Throttle Position Sensor 1 Signal Circuit High Input >> Signal Circuit Inspection
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Signal Circuit Inspection

NOTE: Check for open or short circuit in harness. Refer to Signal Waveform & Data in the "General Information" procedure
  1. Check for short to battery in signal circuit
    1. Disconnect PCM connector
    2. Ignition "ON" & Engine "OFF"
    3. Measure voltage between signal terminal 1 of TPS harness connector and chassis ground

      Specification :  Approx. 0 V

    4. Is voltage within the specification?

      YES 

      • Go to next step as below.

      NO 

  2. Check for open in signal circuit
    1. Ignition "OFF"
    2. Measure resistance between signal terminal 1 of TPS harness connector and TPS signal terminal 41 of the ECM harness connector.

      Specification :  Approx. 0 Ω

    3. Is resistance within the specification?

      YES 

      • Go to next step as below.

      NO