Infiniti F50. Manual - part 438

DTC P0462, P0463 FUEL LEVEL SENSOR

EC-393

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Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

EBS00MFW

1. 

CHECK FUEL LEVEL 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 5 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 M141, B211

●

Harness connector-15

●

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

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

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

119

R/L

Fuel level sensor

[Ignition switch “ON”]

Approximately 0 - 4.8V
Output voltage varies with fuel 
level.

107

B

Fuel level sensor ground

[Engine is running]

●

Idle speed

Approximately 0V

PBIB1249E

Voltage: Battery voltage

PBIB0134E

EC-394

DTC P0462, P0463 FUEL LEVEL SENSOR

3. 

CHECK FUEL LEVEL SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch “OFF”.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 107 and fuel level sensor unit and fuel pump terminal 6.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M141, B211

●

Harness connector-15

●

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 connectors.

5. 

CHECK FUEL LEVEL SENSOR

Refer to 

DI-26, "CHECK FUEL LEVEL SENSOR UNIT"

 .

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

Removal and Installation

EBS00MFX

FUEL LEVEL SENSOR

Refer to 

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

 .

Continuity should exist.

DTC P0500 VSS

EC-395

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DTC P0500 VSS

PFP:32702

Description

EBS00MFY

NOTE:
If DTC P0500 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000,
U1001. Refer to 

EC-141, "DTC U1000, U1001 CAN COMMUNICATION LINE"

 .

The vehicle speed signal is sent to the combination meter from the VDC/TCS/ABS control unit by CAN com-
munication line. The combination meter then sends a signal to the ECM by CAN communication line.

On Board Diagnosis Logic

EBS00MFZ

DTC Confirmation Procedure

EBS00MG0

CAUTION:

Always drive vehicle at a safe speed.

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:
Steps 1 and 2 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.

 WITH CONSULT-II

1.

Start engine (TCS switch “OFF”).

2.

Read “VHCL SPEED SE” in “DATA MONITOR” mode with CONSULT-II. The vehicle speed on CONSULT-
II should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
If NG, go to 

EC-396, "Diagnostic Procedure"

 .

If OK, go to following step.

3.

Select “DATA MONITOR” mode with CONSULT-II.

4.

Warm engine up to normal operating temperature.

5.

Maintain the following conditions for at least 60 consecutive sec-
onds.

6.

If 1st trip DTC is detected, go to 

EC-396, "Diagnostic Procedure"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0500
0500

Vehicle speed sensor

The almost 0 km/h (0 MPH) signal from 
vehicle speed sensor is sent to ECM 
even when vehicle is being driven.

●

Harness or connectors
(The CAN communication line is open or 
shorted)

●

Harness or connectors
(The vehicle speed signal circuit is open or 
shorted)

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Wheel sensor

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Combination meter

●

VDC/TCS/ABS control unit

ENG SPEED

1,400 - 6,000 rpm

COOLAN TEMP/S

More than 70

°

C (158

°

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B/FUEL SCHDL

4.5 - 31.9 msec

Selector lever

Except “P” or “N” position

PW/ST SIGNAL

OFF

SEF196Y

EC-396

DTC P0500 VSS

Overall Function Check

EBS00MG1

Use this procedure to check the overall function of the vehicle speed sensor circuit. During this check, a 1st
trip DTC might not be confirmed.

 WITH GST

1.

Lift up drive wheels.

2.

Start engine.

3.

Read vehicle speed sensor signal in “MODE 1” with GST.
The vehicle speed sensor on GST should be able to exceed 10 km/h (6 MPH) when rotating wheels with
suitable gear position.

4.

If NG, go to 

EC-396, "Diagnostic Procedure"

 .

Diagnostic Procedure

EBS00MG2

1. 

CHECK DTC WITH VDC/TCS/ABS CONTROL UNIT

Refer to 

BRC-12, "TROUBLE DIAGNOSIS"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace.

2. 

CHECK COMBINATION METER

Check combination meter function.
Refer to 

DI-7, "COMBINATION METERS"

 .

>> INSPECTION END