Nissan Maxima. Manual - part 449

EC-280

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0196 EOT SENSOR

YES

>> INSPECTION END

NO

>> Proceed to 

EC-280, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000010094973

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-44, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK ENGINE OIL TEMPERATURE SENSOR

Refer to 

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

Refer to 

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 .

EC-38,

"Component Parts Location"

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 

EC-282, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010094977

Regarding Wiring Diagram information, refer to 

EC-554, "Wiring Diagram"

.

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-44, "Circuit Inspection"

.

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

Refer to 

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

Refer to 

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

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M

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EC

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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 .

EC-38,

"Component Parts Location"

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