Infiniti FX35, FX50 (S51). Manual - part 851

 

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Infiniti FX35, FX50 (S51). Manual - part 851

 

 

P0461 FUEL LEVEL SENSOR

EC-945

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

3.

Remove the fuel feed hose on the fuel level sensor unit.

4.

Connect a spare fuel hose where the fuel feed hose was removed.

5.

Turn ignition switch ON.

6.

Drain fuel by 30   (7-7/8 US gal, 6-5/8 Imp gal) from the fuel tank using proper equipment.

7.

Confirm that the fuel gauge indication varies.

8.

Fill fuel into the fuel tank for 30   (7-7/8 US gal, 6-5/8 Imp gal).

9.

Confirm that the fuel gauge indication varies.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-945, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005237409

1.

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

Refer to 

MWI-45, "CONSULT-III Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Go to 

MWI-61, "Diagnosis Procedure"

.

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

EC-946

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P0462, P0463 FUEL LEVEL SENSOR

P0462, P0463 FUEL LEVEL SENSOR

Description

INFOID:0000000005237410

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 the CAN communication
line.
It consists of two parts, one is mechanical float and the other is variable resistor. Fuel level sensor output volt-
age changes depending on the movement of the fuel mechanical float.

DTC Logic

INFOID:0000000005237411

DTC DETECTION LOGIC

NOTE:
• If DTC P0462 or P0463 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC

UXXXX.

• If DTC P0462 or P0463 is displayed with DTC P0607, first perform the trouble diagnosis for DTC

P0607.Refer to 

EC-964, "DTC Logic"

.

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

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting 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 11 V at ignition
switch ON.

>> 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-946, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005237412

1.

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

Refer to 

MWI-45, "CONSULT-III Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Go to 

MWI-61, "Diagnosis Procedure"

.

2.

CHECK INTERMITTENT INCIDENT

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0462

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

Fuel level sensor circuit 
high input

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

P0462, P0463 FUEL LEVEL SENSOR

EC-947

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

EC-948

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P0500 VSS

P0500 VSS

Description

INFOID:0000000005237413

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.

DTC Logic

INFOID:0000000005237414

DTC DETECTION LOGIC

NOTE:
• If DTC P0500 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
• If DTC P0500 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer

to 

EC-964, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

INSPECTION START

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting 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.

Will CONSULT-III be used?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

CHECK VEHICLE SPEED SIGNAL

NOTE:
This procedure 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-III

1.

Start engine (VDC switch OFF).

2.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Go to 

EC-949, "Diagnosis Procedure"

.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Select “DATA MONITOR” mode with CONSULT-III.

2.

Warm engine up to normal operating temperature.

3.

Maintain the following conditions for at least 50 consecutive seconds.

CAUTION:

Always drive vehicle at a safe speed.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0500

Vehicle speed sensor

The vehicle speed signal sent to ECM 
is almost 0 km/h (0 MPH) 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

More than 1,500 rpm

COOLAN TEMP/S

More than 70

°

C (158

°

F)

 

 

 

 

 

 

 

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