Infiniti QX56 (Z62). Manual - part 576

EC-282

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0191 FRP SENSOR

Is the inspection result normal? 

YES

>> INSPECTION END.

NO

>> Replace FRP sensor. Refer to 

EM-48, "Exploded View"

.

+

−

Condition

Value

(Approx.)

ECM

Connector

Terminal

Connector

Terminal

F111

31

F111

40

[Engine is running]
• Warm-up condition
• Idle speed

0.98 – 1.2 V

[Engine is running]
• Warm-up condition
• Revving engine from idle to 4,000 rpm quickly

1.1 – 2.9 V

P0196 EOT SENSOR

EC-283

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

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P0196 EOT SENSOR

DTC Logic

INFOID:0000000006288301

DTC DETECTION LOGIC

NOTE:
If DTC P0196 is displayed with P0197 or P0198, first perform the trouble diagnosis for DTC P0197,
P0198. Refer to 

EC-285, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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 11 V or more 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.

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

>>

EC-284, "Diagnosis Procedure"

.

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 80

°

C (176

°

F).

If it is above 80

°

C (176

°

F), go to the following steps.

If it is below 80

°

C (176

°

F), warm engine up until “COOLAN TEMP/S” indicates more than 80

°

C (176

°

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.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0196

EOT SENSOR
(Engine oil temperature sen-
sor range/performance)

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 EOT sensor circuit is open or 
shorted)

• Engine oil temperature sensor

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)

EC-284

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0196 EOT SENSOR

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

>>

EC-284, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006288302

1.

CHECK ENGINE OIL TEMPERATURE SENSOR

Refer to 

EC-284, "Component Inspection (Engine Oil Temperature Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace engine oil temperature sensor. Refer to 

EM-54, "Exploded View"

.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (Engine Oil Temperature Sensor)

INFOID:0000000006288303

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)

2.35 - 2.73

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

JMBIA0080ZZ

P0197, P0198 EOT SENSOR

EC-285

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

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P0197, P0198 EOT SENSOR

DTC Logic

INFOID:0000000006217832

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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

>> Go to 

EC-285, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006217833

1.

CHECK ENGINE OIL TEMPERATURE 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 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.

Is the inspection result normal?

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC Detecting Condition

Possible Cause

P0197

EOT SEN/CIRC
(Engine oil temperature 
sensor circuit low input)

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

• Harness or connectors

(The engine oil temperature sensor circuit 
is open or shorted.)

• Engine oil temperature sensor

P0198

EOT SEN/CIRC
(Engine oil temperature 
sensor circuit high input)

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

EOT sensor

Ground

Voltage (V)

Connector

Terminal

F38

1

Ground

Approx. 5

EOT sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F38

2

F111

40

Existed