Infiniti M35/M45 Y50. Manual - part 644

 

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Infiniti M35/M45 Y50. Manual - part 644

 

 

DTC P0182, P0183 FTT SENSOR

EC-1049

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EC

DTC P0182, P0183 FTT SENSOR

PFP:22630

Component Description

NBS005FO

The fuel tank temperature sensor (3) is used to detect the fuel tem-
perature inside the fuel tank. The sensor modifies a voltage signal
from the ECM. The modified signal returns to the ECM as the fuel
temperature input. The sensor uses a thermistor which is sensitive to
the change in temperature. The electrical resistance of the ther-
mistor decreases as temperature increases.

Fuel level sensor unit and fuel pump (1)

Fuel pressure regulator (2)

<Reference data>

*: This data is reference value and is 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

NBS005FP

DTC Confirmation Procedure

NBS005FQ

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-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Wait at least 5 seconds.

4.

If 1st trip DTC is detected, go to 

EC-1051, "Diagnostic Proce-

dure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

PBIB2707E

Fluid temperature

°

C (

°

F)

Voltage*

V

Resistance

k

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.

SEF174Y

EC-1050

[VK45DE]

DTC P0182, P0183 FTT SENSOR

Wiring Diagram

NBS005FR

TBWT1538E

DTC P0182, P0183 FTT SENSOR

EC-1051

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Diagnostic Procedure

NBS005FS

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten ground screws on the body.
Refer to 

EC-864, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2. 

CHECK DTC WITH “UNIFIED METER AND A/C AMP.”

Refer to 

DI-31, "SELF-DIAG RESULTS"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Go to 

DI-22, "Fuel Level Sensor Signal Inspection"

 .

3. 

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 (1).

Illustration shows the view with rear seat cushion and inspection
hole cover (RH) removed.

: Vehicle front

3.

Turn ignition switch ON.

4.

Check voltage between “fuel level sensor unit and fuel pump”
terminal 4 and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

1.

Body ground M70

2.

Body ground M16

PBIB2782E

PBIB2706E

Voltage: Approximately 5V

PBIB0932E

EC-1052

[VK45DE]

DTC P0182, P0183 FTT SENSOR

4. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors M66, B418

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

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

5. 

CHECK FUEL TANK TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect “unified meter and A/C amp.” harness connector.

3.

Check harness continuity between “fuel level sensor unit and fuel pump” terminal 5 and “unified meter and
A/C amp.” terminal 58.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6. 

DETECT MALFUNCTIONING PART

Check the following.

Harness connectors M66, B418

Harness for open or short between “fuel level sensor unit and fuel pump” and “unified meter and A/C
amp.”

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

7. 

CHECK FUEL TANK TEMPERATURE SENSOR

Refer to 

EC-1053, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

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

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

 

 

 

 

 

 

 

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