Nissan Altima L32. Instruction — part 539

P0182, P0183 FTT SENSOR

EC-1277

< COMPONENT DIAGNOSIS >

[VQ35DE]

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P0182, P0183 FTT SENSOR

Description

INFOID:0000000004362117

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 terminals 95 (Fuel tank temperature sensor) and 104 (Sensor
ground).

DTC Logic

INFOID:0000000004362118

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

>> Go to

EC-1277, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004362119

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. 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

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

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.

EC-1278

< COMPONENT DIAGNOSIS >

[VQ35DE]

P0182, P0183 FTT SENSOR

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 B10, E29

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

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

4.

CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

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 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors B1, M6

• Harness connectors E30, M1

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

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

6.

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to

EC-1279, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

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

7.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

.

>> INSPECTION END

Fuel level sensor unit and fuel pump

Ground

Voltage

Connector

Terminal

B42

4

Ground

Approx. 5 V

PBIB0932E

Fuel level sensor unit and fuel pump

ECM

Continuity

Connector

Terminal

Connector

Terminal

B42

5

E10

104

Existed

P0182, P0183 FTT SENSOR

EC-1279

< COMPONENT DIAGNOSIS >

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Component Inspection

INFOID:0000000004362120

1.

CHECK FUEL TANK TEMPERATURE SENSOR

1. Turn ignition switch OFF.

2. Remove fuel level sensor unit.

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”.

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

PBIB0931E

EC-1280

< COMPONENT DIAGNOSIS >

[VQ35DE]

P0222, P0223 TP SENSOR

P0222, P0223 TP SENSOR

Description

INFOID:0000000004362129

Electric throttle control actuator consists of throttle control motor,

throttle position sensor, etc. The throttle position sensor responds to

the throttle valve movement.

The throttle position sensor has two sensors. These sensors are a

kind of potentiometer which transform the throttle valve position into

output voltage, and emit the voltage signals to the ECM. The ECM

judges the current opening angle of the throttle valve from these sig-

nals and controls the throttle valve opening angle in response to

driving conditions via the throttle control motor.

DTC Logic

INFOID:0000000004362130

DTC DETECTION LOGIC

NOTE:

If DTC P0222 or P0223 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Refer to

EC-1379, "DTC 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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1. Start engine and let it idle for 1 second.

2. Check DTC.
Is DTC detected?

YES

>> Go to

EC-1280, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000004362131

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in

GI-45, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0222

Throttle position sensor
1 circuit low input

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

• Harness or connectors

(The sensor circuit is open or shorted.)

• Electric throttle control actuator

(Throttle position sensor 1)

P0223

Throttle position sensor
1 circuit high input

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