Infiniti QX56 (Z62). Manual — part 594

EC-354

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0461 FUEL LEVEL SENSOR

YES

>> INSPECTION END

NO

>> Proceed to

EC-354, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006288332

1.

CHECK DTC WITH “COMBINATION METER”

Refer to

MWI-30, "CONSULT-III Function"

.

Is any DTC detected?

YES

>> Perform trouble diagnosis of detected DTC.

NO

>> GO TO 2.

2.

CHECK FUEL LEVEL SENSOR SIGNAL CIRCUIT

Check fuel level sensor signal circuit. Refer to

MWI-69, "Component Function Check"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-40, "Intermittent Incident"

.

NO

>> Perform trouble diagnosis of fuel level sensor signal circuit. Refer to

MWI-69,

"Diagnosis Procedure"

.

P0462, P0463 FUEL LEVEL SENSOR

EC-355

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

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M

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EC

N

P

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P0462, P0463 FUEL LEVEL SENSOR

DTC Logic

INFOID:0000000006288333

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-378, "DTC Logic"

.

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

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

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 11 V or more 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

>> Proceed to

EC-355, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006288334

1.

CHECK DTC WITH “COMBINATION METER”

Refer to

MWI-30, "CONSULT-III Function"

.

Is any DTC detected?

YES

>> Perform trouble diagnosis of detected DTC.

NO

>> GO TO 2.

2.

CHECK FUEL LEVEL SENSOR SIGNAL CIRCUIT

Check fuel level sensor signal circuit. Refer to

MWI-69, "Component Function Check"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to

GI-40, "Intermittent Incident"

.

NO

>> Perform trouble diagnosis of fuel level sensor signal circuit. Refer to

MWI-69,

"Diagnosis Procedure"

.

DTC No.

Trouble diagnosis name

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0462

FUEL LEVL SEN/CIRC
(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)

• Combination meter
• Fuel level sensor

P0463

FUEL LEVL SEN/CIRC
(Fuel level sensor circuit high
input)

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

EC-356

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0500 VSS

P0500 VSS

Description

INFOID:0000000006217857

The vehicle speed signal is sent to the “combination meter” from the “ABS actuator and electric unit (control
unit)” by CAN communication line. The “combination meter” then sends a signal to the ECM by CAN commu-
nication line.

DTC Logic

INFOID:0000000006217858

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-378, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

INSPECTION START

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-357, "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

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0500

VEH SPEED SEN/CIRC
(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
• Combination meter
• ABS actuator and electric unit (control unit)

ENG SPEED

More than 1,500 rpm

COOLAN TEMP/S

More than 70

°

C (158

°

F)

P0500 VSS

EC-357

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

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EC

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4.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to

EC-357, "Diagnosis Procedure"

.

NO

>> INSPECTION END

4.

PERFORM COMPONENT FUNCTION CHECK

WITH GST

Perform Component Function Check. Refer to

EC-357, "Component Function Check"

.

Use Component Function Check to check the overall function of the vehicle speed signal circuit. During this
check, a 1st trip DTC might not be confirmed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to

EC-357, "Diagnosis Procedure"

.

Component Function Check

INFOID:0000000006217859

1.

PERFORM COMPONENT FUNCTION CHECK

WITH GST

1.

Lift up drive wheels.

2.

Start engine.

3.

Read vehicle speed signal in Service $01 with GST.
The vehicle speed signal on GST should be able to exceed 10 km/h (6 MPH) when rotating wheels with
suitable gear position.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to

EC-357, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006217860

1.

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

Refer to

BRC-40, "CONSULT-III Function"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace malfunctioning part.

2.

CHECK DTC WITH “COMBINATION METER”

Refer to

MWI-30, "CONSULT-III Function"

.

>> INSPECTION END

B/FUEL SCHDL

5.5 - 31.8 msec

Selector lever

Except P or N position

PW/ST SIGNAL

OFF