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Home >> Hyundai >> 2003 >> XG350 Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> Diagnostic Tests >> DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control >> Scantool Diagnostics >> Monitor Scantool Data

Monitor Scantool Data

  1. Engine "ON".
  2. Monitor Engine Coolant Temperature Sensor parameter on Current data.
  3. After the engine has been starting, Check that ECT rises steadily to about 90°C (194°F) and ECT stabilizes when the thermostat opens.
    1. Specification: ECT rises steadily to about 90°C (194°F) and ECT stabilizes when the thermostat opens.
    TEMPERATURE RESISTANCE SPECIFICATION CHART

    Temperature (°C/°F) 0°C (32°F) 20°C (68°F) 40°C (104°F) 80°C (176°F)
    Resistance (kΩ) 5.9 2.5 1.1 0.3
    Voltage (V) 3.4~3.6 2.5~2.7 1.5~1.7 0.5~0.7
    Fig 1: Monitor Engine Coolant Temperature Sensor Parameter On Current Data - Sensor Data At Normal
    G07377679
    Fig 2: Monitor Engine Coolant Temperature Sensor Parameter On Current Data - Sensor Data At Open
    G07377680
    Fig 3: Monitor Engine Coolant Temperature Sensor Parameter On Current Data - Sensor Data At Short
    G07377681
  4. Is Current data displayed correctly?

    YES

    • Fault is intermittent caused by poor contact in the sensor's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO

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