Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » P0197, P0198 EOT sensor
Diagnosis Procedure

1.CHECK ENGINE OIL TEMPERATURE SENSOR POWER SUPPLY

  1. Turn ignition switch OFF.
  2. Disconnect engine oil temperature (EOT) sensor harness connector.
  3. Turn ignition switch ON.
  4. Check the voltage between EOT sensor harness connector and ground.

Is the inspection result normal?

YES >> GO TO 3.

NO >> GO TO 2.

2.CHECK ENGINE OIL TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between EOT sensor harness connector and ECM harness connector.

    4.   Also check harness for short to ground.

Is the inspection result normal?

YES >> Perform the trouble diagnosis for power supply circuit.

NO >> Repair or replace errordetected parts.

3.CHECK EOT SENSOR GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect ECM harness connector.
  3. Check the continuity between EOT sensor harness connector and ECM harness connector.

    4.   Also check harness for short to power.

Is the inspection result normal?

YES >> GO TO 4.

NO >> Repair or replace errordetected parts.

4.CHECK ENGINE OIL TEMPERATURE SENSOR

Check the engine oil temperature sensor. Refer to EC, "Component Inspection".

Is the inspection result normal?

YES >> Check intermittent incident. Refer to GI, "Intermittent Incident".

NO >> Replace engine oil temperature sensor. Refer to EM, "Exploded View".

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