Nissan Maxima. Manual — part 449
EC-280
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0196 EOT SENSOR
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000010094973
1.
CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E9. 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-280, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace engine oil temperature sensor. Refer to
EC-38, "Component Parts Location"
.
3.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000010094974
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. Refer to .
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
PBIB2005E
P0197, P0198 EOT SENSOR
EC-281
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P0197, P0198 EOT SENSOR
Description
INFOID:0000000010094975
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 54
(Engine oil temperature sensor) and 52 (Sensor ground).
DTC Logic
INFOID:0000000010094976
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing 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.
EC-282
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0197, P0198 EOT SENSOR
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010094977
Regarding Wiring Diagram information, refer to
.
1.
CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connection E9. 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, 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, short to ground or short to power in harness or connectors.
4.
CHECK ENGINE OIL TEMPERATURE SENSOR
EC-282, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Replace engine oil temperature sensor. Refer to
EC-38, "Component Parts Location"
.
5.
CHECK INTERMITTENT INCIDENT
GI-41, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000010094978
1.
CHECK ENGINE OIL TEMPERATURE SENSOR
1. Turn ignition switch OFF.
EOT sensor
Ground
Voltage
Connector
Terminal
F68
1
Ground
Approx. 5 V
PBIB0080E
EOT sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F68
2
F13
52
Existed
P0197, P0198 EOT SENSOR
EC-283
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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. Refer to .
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
PBIB2005E
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