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Home >> Nissan-Datsun >> 2011 >> Quest LE >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0137 To P0448 >> DTC P0197, P0198: EOT Sensor >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK EOT SENSOR POWER SUPPLY
    1. Disconnect engine oil temperature (EOT) sensor harness connector.
    2. Turn ignition switch ON.
    3. Check the voltage between EOT sensor harness connector and ground.
      TERMINAL VOLTAGE REFERENCE CHART

      EOT sensor Ground Voltage
      Connector Terminal
      F66 1 Ground Approx. 5 V

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  2. CHECK EOT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between EOT sensor harness connector and ECM harness connector.
      TERMINAL CONTINUITY REFERENCE CHART

      EOT sensor ECM Continuity
      Connector Terminal Connector Terminal
      F66 2 F8 76 Existed
    4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair open circuit, short to ground or short to power in harness or connectors.

  3. CHECK ENGINE OIL TEMPERATURE SENSOR

    Check engine oil temperature sensor. Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    NO: Replace engine oil temperature sensor. Refer to "EXPLODED VIEW ".

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