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Home >> Suzuki >> 2008 >> XL7 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0128 >> Component Testing

Component Testing

  1. Ignition OFF, disconnect the harness connector of the ECT sensor.
    NOTE: A thermometer can be used to the used to test the sensor off the vehicle.
  2. Test the ECT sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the TEMPERATURE VERSUS RESISTANCE - ENGINE COOLANT TEMPERATURE SENSOR  table and verify that the resistance is within 5 percent of the specification.
    • If the resistance vs. temperature is not within 5 percent, replace the ECT sensor.
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