Nissan Pathfinder. Manual — part 490

EC-266

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0196 EOT SENSOR

If it is below 70

°C (158°F), warm engine up until “COOLANT 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.

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” above.
Is 1st trip DTC detected?

YES

>> Proceed to

EC-268, "Diagnosis Procedure"

.

NO

>> GO TO 5.

5.

PERFORM COMPONENT FUNCTION CHECK (FOR MULFUNCTION B)

Perform component function check. Refer to

EC-268, "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

EC-268, "Diagnosis Procedure"

.

6.

PRECONDITIONING

If DTC CONFIRMATION PROCEDURE has been previously conducted, always perform the following proce-

dure 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, 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.

COOLANT TEMP/S

Below 40

°C (104°F)

INT/A TEMP SE

Below 40

°C (104°F)

Difference between “COOLANT TEMP/S” and “INT/A TEMP SE”

Within 6

°C (11°F)

P0196 EOT SENSOR

EC-267

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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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

EC-268, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Component Function Check

INFOID:0000000009178180

1.

CHECK ENGINE OIL TEMPERATURE (EOT) SENSOR

1. Turn ignition switch OFF.

2. Disconnect EOT sensor harness connector.

3. Remove EOT sensor. Refer to

EC-14, "ENGINE CONTROL SYSTEM : Component Parts Location"

.

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

EC-268, "Diagnosis Procedure"

.

2.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to

GI-49, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to

EC-268, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009178181

1.

CHECK ENGINE OIL TEMPERATURE SENSOR

Check engine oil temperature sensor. Refer to

EC-268, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-49, "Intermittent Incident"

.

NO

>> Replace engine oil temperature sensor. Refer to

EC-14, "ENGINE CONTROL SYSTEM : Compo-

nent Parts Location"

.

Component Inspection

INFOID:0000000009178182

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. Refer to

EC-14, "ENGINE CONTROL SYSTEM : Component

Parts Location"

.

Terminals

Condition

Resistance (k

Ω)

1 and 2

Temperature [

°C (°F)]

20 (68)

2.37 – 2.63

50 (122)

0.68 – 1.00

90 (194)

0.236 – 0.260

JMBIA0080ZZ

EC-268

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0196 EOT 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-14,

"ENGINE CONTROL SYSTEM : Component Parts Location"

.

Terminals

Condition

Resistance (k

Ω)

1 and 2

Temperature [

°C (°F)]

20 (68)

2.37 - 2.63

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

JMBIA0080ZZ

P0197, P0198 EOT SENSOR

EC-269

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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P0197, P0198 EOT SENSOR

DTC Logic

INFOID:0000000009178183

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?

YES

>> Proceed to

EC-270, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178184

1.

CHECK EOT SENSOR POWER SUPPLY

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 2.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

2.

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.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible Cause

P0197

EOT SEN/CIRC
(Engine oil temperature sen-
sor circuit low)

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

EOT SEN/CIRC
(Engine oil temperature sen-
sor circuit high)

An excessively high voltage from the sensor is
sent to ECM.

EOT sensor

Ground

Voltage

Connector

Terminal

F68

1

Ground

Approx. 5 V

EOT sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F68

2

F52

76

Existed