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Home >> Hyundai >> 2006 >> Accent Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0123 Throttle/Pedal Position Sensor/Switch "A" Circuit High Input >> Signal Circuit Inspection
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Signal Circuit Inspection

  1. Check for open in signal circuit.
    1. Key "OFF".
    2. Disconnect TPS connector.
    3. Key "ON".
    4. Measure the voltage between terminal 1 of TPS harness connector and chassis ground.

      Specification: Approx. 5V

    5. Is the measured voltage within specification?

      YES  : --> Go to "Check for Short in signal circuit" procedure.

      NO  : --> Repair Open or Short to power in signal circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

  2. Check for short in signal circuit.
    1. Key "OFF".
    2. Disconnect TPS connector and ECM/PCM connector.
    3. Measure the resistance between terminal 1 and 2 of TPS harness connector.

      Specification: Infinite

    4. Is the measured resistance within specification ?

      YES  : --> Go to "COMPONENT INSPECTION " procedure.

      NO  : --> Repair Short to power in signal circuit and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

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