Infiniti FX35, FX50 (S51). Manual — part 677
P0196 EOT SENSOR
EC-249
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
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P0196 EOT SENSOR
Description
INFOID:0000000005236846
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 tempera-
ture 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>
*: These data are reference values and are measured between ECM terminals 78
(Engine oil temperature sensor) and 84 (Sensor ground).
DTC Logic
INFOID:0000000005236847
DTC DETECTION LOGIC
NOTE:
If DTC P0196 is displayed with P0197 or P0198, first perform the trouble diagnosis for DTC P0197,
P0198. Refer to
.
DTC CONFIRMATION PROCEDURE
1.
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 2.
2.
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.
SEF594K
Engine oil temperature
[
°
C (
°
F)]
Voltage*
(V)
Resistance
(k
Ω
)
–10 (14)
4.4
7.0 - 11.4
20 (68)
3.5
2.1 - 2.9
50 (122)
2.2
0.68 - 1.00
90 (194)
0.9
0.236 - 0.260
110 (230)
0.6
0.143 - 0.153
SEF012P
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0196
Engine oil temperature
sensor range/perfor-
mance
Rationally incorrect voltage from the sensor is
sent to ECM, compared with the voltage signals
from engine coolant temperature sensor and in-
take air temperature sensor.
• Harness or connectors
(The sensor circuit is open or shorted)
• Engine oil temperature sensor
EC-250
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P0196 EOT SENSOR
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
>>
.
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-II
With CONSULT-III
1.
Select “DATA MONITOR” mode with CONSULT-III.
2.
Check that “COOLAN TEMP/S” indicates above 70
°
C (158
°
F).
If it is above 70
°
C (158
°
F), go to the following steps.
If it is below 70
°
C (158
°
F), warm engine up until “COOLAN TEMP/S” indicates more than 70
°
C (158
°
F).
Then perform the following steps.
3.
Turn ignition switch OFF and soak the vehicle in a cool place.
4.
Turn ignition switch ON.
NOTE:
Do not turn ignition switch OFF until step 8.
5.
Select “DATA MONITOR” mode with CONSULT-III.
6.
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 fol-
lowing steps.
NOTE:
• Do not turn ignition switch OFF.
• If it is supposed to need a long period of time, do not deplete the battery.
7.
Start engine and let it idle for 5 minutes.
8.
Check 1st trip DTC.
With GST
Follow the procedure “With CONSULT-III” above.
Is 1st trip DTC detected?
YES
>>
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005236848
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection M95. Refer to Ground Inspection in
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK ENGINE OIL TEMPERATURE SENSOR
EC-251, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace engine oil temperature sensor.
3.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
COOLAN TEMP/S
Below 40
°
C (104
°
F)
INT/A TEMP SE
Below 40
°
C (104
°
F)
Difference between “COOLAN TEMP/S” and “INT/A TEMP SE”
Within 6
°
C (11
°
F)
P0196 EOT SENSOR
EC-251
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
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>> INSPECTION END
Component Inspection
INFOID:0000000005236849
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 termi-
nals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace engine oil temperature sensor.
Terminals
Condition
Resistance (k
Ω
)
1 and 2
Temperature
[
°
C (
°
F)]
20 (68)
2.1 - 2.9
50 (122)
0.68 - 1.00
90 (194)
0.236 - 0.260
JMBIA0080ZZ
EC-252
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P0197, P0198 EOT SENSOR
P0197, P0198 EOT SENSOR
Description
INFOID:0000000005236850
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 tempera-
ture 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>
*: These data are reference values and are measured between ECM terminals 78
(Engine oil temperature sensor) and 84 (Sensor ground).
DTC Logic
INFOID:0000000005236851
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
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.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and wait at least 5 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
SEF594K
Engine oil temperature
[
°
C (
°
F)]
Voltage*
(V)
Resistance
(k
Ω
)
–10 (14)
4.4
7.0 - 11.4
20 (68)
3.5
2.1 - 2.9
50 (122)
2.2
0.68 - 1.00
90 (194)
0.9
0.236 - 0.260
110 (230)
0.6
0.143 - 0.153
SEF012P
DTC No.
Trouble Diagnosis
Name
DTC Detecting Condition
Possible Cause
P0197
Engine oil tempera-
ture sensor circuit low
input
An excessively low voltage from the sensor is
sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
• Engine oil temperature sensor
P0198
Engine oil tempera-
ture sensor circuit
high input
An excessively high voltage from the sensor is
sent to ECM.
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