Infiniti M35/M45 Y50. Manual - part 675

 

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Infiniti M35/M45 Y50. Manual - part 675

 

 

DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT

EC-1173

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DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT

PFP:25060

Component Description

NBS005IZ

The fuel level sensor is mounted in the fuel level sensor unit.
The sensor detects a fuel level in the fuel tank and transmits a signal
to the “unified meter and A/C amp.”. The “unified meter and A/C
amp.” sends the fuel level sensor signal to the ECM through CAN
communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.

Fuel level sensor unit and fuel pump (1)

Fuel pressure regulator (2)

Fuel tank temperature sensor (3)

On Board Diagnosis Logic

NBS005J0

NOTE:

If DTC P0462 or P0463 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis
for DTC U1000, U1001.
 Refer to 

EC-865, "DTC U1000, U1001 CAN COMMUNICATION LINE"

 .

If DTC P0462 or P0463 is displayed with DTC U1010, first perform the trouble diagnosis for DTC
U1010.
 Refer to 

EC-868, "DTC U1010 CAN COMMUNICATION"

 .

This diagnosis indicates the former, to detect open or short circuit malfunction.

DTC Confirmation Procedure

NBS005J1

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 11V at ignition
switch ON.

 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-1174, "Diagnostic Proce-

dure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

PBIB2707E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0462
0462

Fuel level sensor circuit 
low input

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

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

Harness or connectors
(The sensor circuit is open or shorted)

Unified meter and A/C amp.

Fuel level sensor

P0463
0463

Fuel level sensor circuit 
high input

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

SEF195Y

EC-1174

[VK45DE]

DTC P0462, P0463 FUEL LEVEL SENSOR CIRCUIT

Diagnostic Procedure

NBS005J2

1. 

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

Refer to 

DI-31, "SELF-DIAG RESULTS"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Go to 

DI-22, "Fuel Level Sensor Signal Inspection"

 .

2. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Removal and Installation

NBS005J3

FUEL LEVEL SENSOR

Refer to 

FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY"

 .

DTC P0500 VSS

EC-1175

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DTC P0500 VSS

PFP:32702

Description

NBS005J4

NOTE:

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

EC-865, "DTC U1000, U1001 CAN COMMUNICATION LINE"

 .

If DTC P0500 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010.
Refer to 

EC-868, "DTC U1010 CAN COMMUNICATION"

 .

The vehicle speed signal is sent to the “unified meter and A/C amp.” from the “ABS actuator and electric unit
(control unit)” by CAN communication line. The “unified meter and A/C amp.” then sends a signal to the ECM
by CAN communication line.

On Board Diagnosis Logic

NBS005J5

DTC Confirmation Procedure

NBS005J6

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 (VDC 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-1176, "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 50 consecutive sec-
onds.

6.

If 1st trip DTC is detected, go to 

EC-1176, "Diagnostic Proce-

dure"

 .

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)

Wheel sensor

Unified meter and A/C amp.

ABS actuator and electric unit (control unit)

ENG SPEED

1,550 - 6,000 rpm

COOLAN TEMP/S

More than 70

°

C (158

°

F)

B/FUEL SCHDL

5.4 - 31.8 msec

Selector lever

Except P or N position

PW/ST SIGNAL

OFF

SEF196Y

EC-1176

[VK45DE]

DTC P0500 VSS

Overall Function Check

NBS005J7

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 Service $01 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-1176, "Diagnostic Procedure"

 .

Diagnostic Procedure

NBS005J8

1. 

CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”

Refer to 

BRC-10, "TROUBLE DIAGNOSIS"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace.

2. 

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

Refer to 

DI-5, "COMBINATION METERS"

 .

>> INSPECTION END

 

 

 

 

 

 

 

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