P0196
P0196 EOT SENSOR
Description
The engine oil temperature sensor is used to detect the engine oil temperature. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the engine oil temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases.
[Reference data]
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P0196 is displayed with P0197 or P0198, first perform the trouble diagnosis for DTC P0197 or
P0198. P0197.
DTC CONFIRMATION PROCEDURE
1.INSPECTION START
Is it necessary to erase permanent DTC?
YES - GO TO 6.
NO - GO TO 2.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
- GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE-I
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and let it idle for 5 minutes and 10 seconds.
6. Check 1st trip DTC.
Is 1st trip DTC detected?
YES - SEE Diagnosis Procedure.
NO - GO TO 4.
4.PERFORM DTC CONFIRMATION PROCEDURE-II
1. Select "DATA MONITOR" mode with CONSULT-III.
2. Check that "COOLAN TEMP/S" indicates above 80�C (176�F).
If it is above 80�C (176�F), go to the following steps.
If it is below 80�C (176�F), warm engine up until "COOLAN TEMP/S" indicates more than 80�C (176�F).
Then perform the following steps.
3. Turn ignition switch OFF and soak the vehicle in a cool place.
4. Turn ignition switch ON.
5. Turn ignition switch OFF and wait at least 10 seconds.
6. Turn ignition switch ON.
NOTE:
Do not turn ignition switch OFF until step 10.
7. Select "DATA MONITOR" mode with CONSULT-III.
8. Check the following.
If they are within the specified range, perform the following steps.
If they are out of the specified range, soak the vehicle to meet the above conditions. Then perform the following steps.
NOTE:
- Do not turn ignition switch OFF.
- If it is supposed to need a long period of time, do not deplete the battery.
9. Start engine and let it idle for 5 minutes.
10. Check 1st trip DTC.
Is 1st trip DTC detected?
YES - SEE Diagnosis Procedure.
NO - GO TO 5.
5.PERFORM COMPONENT FUNCTION CHECK (FOR MALFUNCTION B)
Perform component function check. SEE Component Function Check.
NOTE:
Use the component function check to check the overall function of the EOT sensor circuit. During this check, a
1st trip DTC might not be confirmed.
Is the inspection result normal?
YES - INSPECTION END
NO - Proceed to SEE Diagnosis Procedure.
6.PRECONDITIONING
If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following procedure before conducting the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TEST CONDITION:
- Before performing the following procedure, do not add fuel.
- Before performing the following procedure, check that fuel level is between 1/4 and 4/4.
- Before performing the following procedure, confirm that battery voltage is 11 V or more at idle.
- GO TO 7.
7.PERFORM DTC CONFIRMATION PROCEDURE B
1. Start engine and let it idle for 60 minutes.
2. Move the vehicle to a cool place.
NOTE:
Cool the vehicle in an environment of ambient air temperature between -10�C (14�F) and 35�C (95�F).
3. Turn ignition switch OFF and soak the vehicle for 12 hours.
CAUTION:
Never turn ignition switch ON during soaking.
NOTE:
The vehicle must be cooled with the food open.
4. Start engine and let it idle for 5 minutes or more.
CAUTION:
Never turn ignition switch OFF during idling.
5. Check 1st trip DTC.
Is 1st trip DTC detected?
YES - Proceed to SEE Diagnosis Procedure.
NO - INSPECTION END
Component Function Check
1.CHECK ENGINE OIL TEMPERATURE (EOT) SENSOR
1. Turn ignition switch OFF.
2. Disconnect EOT sensor harness connector.
3. Remove EOT sensor. Exploded View.
4. Check resistance between EOT sensor terminals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES - GO TO 2.
NO - Proceed to SEE Diagnosis Procedure.
2.CHECK INTERMITTENT INCIDENT
Check intermittent incident. Intermittent Incident.
Is the inspection result normal?
YES - INSPECTION END
NO - Proceed to SEE Diagnosis Procedure.
Diagnosis Procedure
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace ground connection.
2.CHECK ENGINE OIL TEMPERATURE SENSOR
SEE Component Inspection.
Is the inspection result normal?
YES - GO TO 3.
NO - Replace engine oil temperature sensor.
3.CHECK INTERMITTENT INCIDENT
Intermittent Incident.
- INSPECTION END
Component Inspection
1.CHECK ENGINE OIL TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect engine oil temperature sensor harness connector.
3. Remove engine oil temperature sensor.
4. Check resistance between engine oil temperature sensor terminals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace engine oil temperature sensor.