Infiniti G35 (V35) Sedan. Manual — part 523
EC-238
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0196 EOT SENSOR
>> INSPECTION END
Component Inspection
INFOID:0000000000956626
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
1 and 2
Temperature
°
C (
°
F)
20 (68)
2.1 - 2.9
k
Ω
50 (122)
0.68 - 1.00
k
Ω
90 (194)
0.236 - 0.260
k
Ω
JMBIA0080ZZ
P0197, P0198 EOT SENSOR
EC-239
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0197, P0198 EOT SENSOR
Description
INFOID:0000000000956627
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 terminal 78
(Engine oil temperature sensor) and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM’s transis-
tor. Use a ground other than ECM terminals, such as the ground.
DTC Logic
INFOID:0000000000956628
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> 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.
EC-240
< COMPONENT DIAGNOSIS >
[VQ35HR]
P0197, P0198 EOT SENSOR
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000000956629
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 EOT SENSOR POWER SUPPLY CIRCUIT
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.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
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.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK ENGINE OIL TEMPERATURE SENSOR
EC-240, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace engine oil temperature sensor.
5.
CHECK INTERMITTENT INCIDENT
GI-39, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000000956630
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.
EOT sensor
Ground
Voltage
Connector
Terminal
F38
1
Ground
Approx. 5V
EOT sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F38
2
F102
84
Existed
P0197, P0198 EOT SENSOR
EC-241
< COMPONENT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
1 and 2
Temperature
°
C (
°
F)
20 (68)
2.1 - 2.9
k
Ω
50 (122)
0.68 - 1.00
k
Ω
90 (194)
0.236 - 0.260
k
Ω
JMBIA0080ZZ
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