Nissan Titan A60. Manual - part 393

EC-238

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0181 FTT SENSOR

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to 

EC-238, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006599164

1.

INSPECTION START

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

EC-236, "DTC Logic"

.

Which malfunction is detected?

A

>> GO  TO  2.

B

>> GO  TO  6.

2.

CHECK FUEL TANK TEMPERATURE (FTT) 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 for open or short between ECM and fuel level sensor unit and fuel pump

• Loose or poor connection for each connector and harness

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

4.

CHECK FTT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

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

3. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.

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

• Loose or poor connection for each connector and harness

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

6.

CHECK FTT SENSOR

Check FTT sensor. Refer to 

EC-239, "Component Inspection"

.

Fuel level sensor unit and fuel pump

Ground

Voltage (V)

Connector

Terminal

C5 (Without FLEXIBLE FUEL)

C7 (With FLEXIBLE FUEL)

4

Ground

Approx. 5

Fuel level sensor unit and fuel pump

Ground

Continuity

Connector

Terminal

C5 (Without FLEXIBLE FUEL)

C7 (With FLEXIBLE FUEL)

3

Ground

Existed

P0181 FTT SENSOR

EC-239

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

C

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E

F

G

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A

EC

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Is the inspection result normal?

YES

>> GO TO 7.

NO

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

FL-11, "Removal and Installation"

.

7.

CHECK INTERMITTENT INCIDENT

Check intermittent incident. Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000006599165

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-11, "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

>> INSPECTION END

NO

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

FL-11, "Removal and Installation"

.

Terminals

Condition

Resistance (k

Ω)

4 and 3

Temperature [

°C (°F)]

20 (68)

2.3 – 2.7

50 (122)

0.79 – 0.90

JMBIA0167ZZ

EC-240

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0182, P0183 FTT SENSOR

P0182, P0183 FTT SENSOR

Component Description

INFOID:0000000006158665

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>

*: These data are reference values and are measured between ECM terminal 107
(Fuel tank temperature sensor) and ground.

CAUTION:

Do not 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

INFOID:0000000006158666

DTC Confirmation Procedure

INFOID:0000000006158667

1. If DTC Confirmation Procedure has been previously conducted, always perform the following before con-

ducting the next step.

a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c.

Turn ignition switch OFF and wait at least 10 seconds.

2. Turn ignition switch ON.
3. Wait at least 5 seconds.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to 

EC-240, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006158668

1.

CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

BBIA0442E

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.

P0182, P0183 FTT SENSOR

EC-241

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

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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-III or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors C1, E41

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

>> Repair harness or connector.

3.

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 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors C1, E41

• 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.

5.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-242, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace “fuel level sensor unit fuel pump”.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "How to Check Terminal"

 and 

GI-39, "Intermittent Incident"

.

BBIA0442E

Voltage: Approximately 5V

PBIB0932E

Continuity should exist.