DTC DETECTION LOGIC
DTC No. | Trouble diagnosis name | DTC detecting condition | Possible cause |
P0197 | EOT SEN/CIRC (Engine oil temperature sensor circuit low input) | An excessively low voltage from the engine oil temperature sensor is sent to ECM. |
|
P0198 | EOT SEN/CIRC (Engine oil temperature sensor circuit high input) | An excessively high voltage from the engine oil temperature sensor is sent to ECM. |
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
Is 1st trip DTC detected?
YES >> Proceed to EC, "Diagnosis Procedure".
NO >> INSPECTION END
1.CHECK ENGINE OIL TEMPERATURE SENSOR POWER SUPPLY
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK ENGINE OIL TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
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
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".
1.CHECK ENGINE OIL TEMPERATURE SENSOR
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace engine oil temperature sensor. Refer to EM, "Exploded View".
Owner's Manual/Service Manual order information
Genuine NISSAN Service Manuals for this model
year and prior can be purchased. A Genuine
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This manual is the same one used by the factorytrained
technicians working at NISSAN dealerships.
Genuine NI ...
Engine protection control at low engine oil pressure
Engine protection control at low engine oil pressure : system diagram
Engine protection control at low engine
oil pressure : system description
INPUT/OUTPUT SIGNAL CHART
Sensor
Input signal to ECM
ECM function
Actuator
Engine oil pressure sensor
Engine pressure
...