Infiniti F50. Manual - part 412

DTC P0182, P0183 FTT SENSOR

EC-289

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EC

Diagnostic Procedure

EBS00MD5

1. 

CHECK FUEL TANK TEMPERATURE SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch “OFF”.

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 ter-
minal 4 and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors B211, M141

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Harness connectors M135, F105

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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 2 and body ground.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

PBIB1249E

Voltage: Approximately 5V

PBIB0316E

Continuity should exist.

EC-290

DTC P0182, P0183 FTT SENSOR

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors B211, M141

●

Harness connectors M135, F105

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Joint connector-30

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

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

5. 

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-289, "Diagnostic Procedure"

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OK or NG

OK

>> GO TO 6.

NG

>> Replace fuel level sensor unit.

6. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

EBS00MD6

FUEL TANK TEMPERATURE SENSOR

1.

Remove fuel level sensor unit.

2.

Check resistance between fuel level sensor unit and fuel pump
terminals 4 and 2 by heating with hot water or heat gun as
shown in the figure.

Removal and Installation

EBS00MD7

FUEL TANK TEMPERATURE SENSOR

Refer to 

FL-3, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"

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Temperature 

°

C (

°

F)

Resistance k

Ω

20 (68)

2.3 - 2.7

50 (122)

0.79 - 0.90

PBIB0200E

DTC P0222, P0223 TP SENSOR

EC-291

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DTC P0222, P0223 TP SENSOR

PFP:16119

Component Description

EBS00MD8

Electric throttle control actuator consists of throttle control motor,
accelerator pedal position sensor, throttle position sensor, etc. The
throttle position sensor responds to the throttle valve movement. 
The throttle position sensor has the two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect the opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.

CONSULT-II Reference Value in Data Monitor Mode

EBS00MD9

Specification data are reference values.

*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

EBS00MDA

These self-diagnoses have the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, ECM enters fail-safe mode an the MIL lights up.

DTC Confirmation Procedure

EBS00MDB

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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

PBIB0145E

MONITOR ITEM

CONDITION

SPECIFICATION

THRTL SEN1
THRTL SEN2*

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

More than 0.36V

●

Selector lever: D

Accelerator pedal: Fully depressed

Less than 4.75V

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0222
0222

Throttle position sensor 1 
circuit low input

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

●

Harness or connectors
(The TP sensor 1 circuit is open or 
shorted.)

●

Electric throttle control actuator
(TP sensor 1)

P0223
0223

Throttle position sensor 1 
circuit high input

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

Engine operation condition in fail-safe mode

The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10 
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor. 

EC-292

DTC P0222, P0223 TP SENSOR

 WITH CONSULT-II

1.

Turn ignition switch “ON”.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and let it idle for 1 second.

4.

If DTC is detected, go to 

EC-294, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF058Y