Nissan Frontier. Manual - part 417

P0181 FTT SENSOR

EC-239

< DTC/CIRCUIT DIAGNOSIS >

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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 hood 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-239, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Component Function Check

INFOID:0000000009480895

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-10, "Removal and Installation"

.

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-239, "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-239, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000009480896

1.

INSPECTION START

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

EC-237, "On Board Diagnosis Logic"

.

Which malfunction is detected?

A

>> GO TO 2.

B

>> GO TO 7.

2.

CHECK COMBINATION METER FUNCTION

Refer to 

MWI-4, "Work Flow"

.

OK or NG

OK

>> GO TO 3.

NG

>> Go to 

MWI-34, "Component Function Check"

.

3.

CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

Terminals

Condition

Resistance k

Ω

3 and 4

Temperature [

°C (°F)]

20 (68)

2.3 – 2.7

50 (122)

0.79 – 0.90

JMBIA0167ZZ

EC-240

< DTC/CIRCUIT DIAGNOSIS >

[QR25DE]

P0181 FTT SENSOR

2. Disconnect “fuel level sensor unit and fuel pump” harness con-

nector.

3. Turn ignition switch ON.

4. Check voltage between “fuel level sensor unit and fuel pump”

terminal 4 and ground with CONSULT or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E41, C1

• Harness for open or short between ECM and “fuel level sensor unit and fuel pump”

>> Repair harness or connector.

5.

CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Check harness continuity between “fuel level sensor unit and fuel pump” terminal 3 and ground. Refer to

Wiring Diagram.

3. Also check harness for short to power.
OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors E41, C1

• Harness for open or short between “fuel level sensor unit and fuel pump” and ground

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

7.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-241, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

>> Replace fuel level sensor unit. Refer to 

FL-10, "Removal and Installation"

.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

BBIA0545E

Voltage: Approximately 5V

PBIB0932E

Continuity should exist.

P0181 FTT SENSOR

EC-241

< DTC/CIRCUIT DIAGNOSIS >

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>> INSPECTION END

Component Inspection

INFOID:0000000009480897

FUEL TANK TEMPERATURE SENSOR

1. Remove fuel level sensor unit. Refer to 

FL-10, "Removal and Installation"

.

2. Check resistance between “fuel level sensor unit and fuel pump”

terminals 3 and 4 by heating with hot water or heat gun as

shown in the figure.

Temperature 

°C (°F)

Resistance k

Ω

20 (68)

2.3 - 2.7

50 (122)

0.79 - 0.90

SEF476YA

EC-242

< DTC/CIRCUIT DIAGNOSIS >

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P0182, P0183 FTT SENSOR

P0182, P0183 FTT SENSOR

Component Description

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The fuel tank temperature sensor is used to detect the fuel tempera-

ture inside the fuel tank. The sensor modifies a voltage signal from

the ECM. The modified signal returns to the ECM as the fuel temper-

ature 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>

*: This data is reference value and is measured between ECM terminal 95 (Fuel tank
temperature sensor) and 112 (ECM ground).

CAUTION:

Never use ECM ground terminals when measuring input/output

voltage. Doing so may result in damage to the ECM's transistor.

Use a ground other than ECM terminals, such as the ground.

On Board Diagnosis Logic

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DTC Confirmation Procedure

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NOTE:

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at

least 10 seconds before conducting the next test.

 WITH CONSULT

1. Turn ignition switch ON and wait at least 5 seconds.

2. Check 1st trip DTC.

3. If 1st trip DTC is detected, go to 

EC-242, "Diagnosis Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT” above.

Diagnosis Procedure

INFOID:0000000009480901

1.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

BBIA0545E

Fluid temperature

[

°C (°F)]

Voltage*

(V)

Resistance

(k

Ω)

20 (68)

3.5

2.3 - 2.7

50 (122)

2.2

0.79 - 0.90

SEF012P

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0182
0182

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
0183

Fuel tank temperature 
sensor circuit high input

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