Nissan Quest E52. Manual - part 510

EC-250

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0181 FTT SENSOR

2.

Wait at least 10 seconds.

3.

Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT” above.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-251, "Diagnosis Procedure"

.

NO

>> GO TO 6.

6.

PERFORM COMPONENT FUNCTION CHECK (FOR MALFUNCTION B)

Perform component function check. Refer to 

EC-250, "Component Function Check"

.

NOTE:
Use the component function check to check the overall function of the FTT 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-251, "Diagnosis Procedure"

.

7.

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 8.

8.

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.

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-251, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Component Function Check

INFOID:0000000009651092

1.

CHECK FUEL TANK TEMPERATURE (FTT) SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect fuel level sensor unit and fuel pump harness connector.

3.

Remove fuel level sensor unit. Refer to 

FL-5, "Exploded View"

.

P0181 FTT SENSOR

EC-251

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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4.

Check resistance between fuel level sensor unit and fuel pump
terminals by heating with hot water as shown in the figure.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Proceed to 

EC-251, "Diagnosis Procedure"

.

2.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-251, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009651093

1.

INSPECTION START

Confirm the detected malfunction (A or B). Refer to 

EC-249, "DTC Logic"

.

Which malfunction is detected?

A

>> GO TO 2.

B

>> GO TO 5.

2.

CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect fuel level sensor unit and fuel pump harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between fuel level sensor unit and fuel pump harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between fuel tank temperature sensor harness connector and ECM harness connec-
tor.

Is the inspection result normal?

YES

>> Perform the trouble diagnosis for power supply circuit.

NO

>> Repair or replace error-detected parts.

4.

CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

Terminals

Condition

Resistance (k

Ω

)

4 and 5

Temperature [

°

C (

°

F)]

20 (68)

2.3 – 2.7

50 (122)

0.79 – 0.90

JMBIA0167ZZ

Fuel level sensor unit and fuel pump

Ground

Voltage

Connector

Terminal

B40

4

Ground

Approx. 5 V

Fuel level sensor unit and fuel 

pump

ECM

Continuity

Connector

Terminal

Connector

Terminal

B40

4

E16

111

Existed

EC-252

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0181 FTT SENSOR

3.

Check the continuity between fuel level sensor unit and fuel pump 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 5.

NO

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

5.

CHECK FUEL TANK TEMPERATURE SENSOR

Check fuel tank temperature sensor. Refer to 

EC-252, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-42, "Intermittent Incident"

.

NO

>> Replace fuel level sensor unit and fuel pump. Refer to 

FL-5, "Exploded View"

.

Component Inspection

INFOID:0000000009651094

1.

CHECK FUEL TANK TEMPERATURE SENSOR

1.

Turn ignition switch OFF.

2.

Remove fuel level sensor unit. Refer to 

FL-5, "Exploded View"

.

3.

Check resistance between “fuel level sensor unit and fuel pump”
terminals by heating with hot water as shown in the figure.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace fuel level sensor unit and fuel pump. Refer to

FL-5, "Exploded View"

.

Fuel level sensor unit and fuel pump

ECM

Continuity

Connector

Terminal

Connector

Terminal

B40

5

E16

120

Existed

Terminals

Condition

Resistance

4 and 5

Temperature [

°

C (

°

F)]

20 (68)

2.3 - 2.7 k

Ω

50 (122)

0.79 - 0.90 k

Ω

JMBIA0167ZZ

P0182, P0183 FTT SENSOR

EC-253

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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EC

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P0182, P0183 FTT SENSOR

DTC Logic

INFOID:0000000009651095

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.

Turn ignition switch ON and wait at least 5 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-253, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009651096

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to Ground Inspection in 

GI-45, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect “fuel level sensor unit and fuel pump” harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between “fuel level sensor unit and fuel pump” harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E104, B4
• Harness for open or short between ECM and “fuel level sensor unit and fuel pump”

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0182

Fuel tank temperature 
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.)

• Fuel tank temperature sensor

P0183

Fuel tank temperature 
sensor circuit high input

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

Fuel level sensor unit and fuel pump

Ground

Voltage

Connector

Terminal

B40

4

Ground

Approx. 5 V