Infiniti QX56 (Z62). Manual - part 634

EC-514

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

LOW PRESSURE FUEL PUMP

Component Inspection (FPCM)

INFOID:0000000006218020

1.

CHECK FUEL PUMP CONTROL MODULE (FPCM)

1.

Check the voltage between FPCM terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace FPCM. Refer to 

EC-537, "Removal and Installation"

.

FPCM

Condition

Voltage

+

−

Terminal

Terminal

7

6

For 1 second after turning ignition 
switch ON

Approx. 8.5 V

More than 1 second after turning 
ignition switch ON

Approx. 0 V

Idle speed

Approx. 8.5 V

MALFUNCTION INDICATOR LAMP

EC-515

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

MALFUNCTION INDICATOR LAMP

Component Function Check

INFOID:0000000006218021

1.

CHECK MIL FUNCTION

1.

Turn ignition switch ON.

2.

Check that MIL illuminates.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-515, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006218022

1.

CHECK DTC

Check that DTC UXXXX is not displayed.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform trouble diagnosis for DTC UXXXX.

2.

CHECK DTC WITH COMBINATION METER

Refer to 

MWI-30, "CONSULT-III Function"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Perform trouble diagnosis for DTC indicated.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter.

NO

>> Repair or replace malfunctioning part.

EC-516

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

Component Function Check

INFOID:0000000006256490

1.

CHECK ORVR FUNCTION

Check whether the following symptoms are present.
• Fuel odor from EVAP canister is strong.
• Cannot refuel/Fuel odor from the fuel filler opening is strong while refueling.

Are any symptoms present?

YES

>> Proceed to 

EC-516, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006256491

1.

INSPECTION START

Check whether the following symptoms are present.
A: Fuel odor from EVAP canister is strong.
B: Cannot refuel/Fuel odor from the fuel filler opening is strong while refueling.

Which symptom is present?

A

>> GO  TO  2.

B

>> GO  TO  7.

2.

CHECK EVAP CANISTER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.5 kg (5.5 lb).

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

Check if water will drain from EVAP canister (1).
• EVAP canister vent control valve (2)

Does water drain from the EVAP canister?

YES

>> GO TO 4.

NO

>> GO TO 6.

4.

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

>> Repair or replace EVAP hose.

6.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-518, "Component Inspection (EVAP Vapor Cut Valve)"

.

JSBIA0692ZZ

ON BOARD REFUELING VAPOR RECOVERY (ORVR)

EC-517

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace refueling EVAP vapor cut valve with fuel tank.

7.

CHECK EVAP CANISTER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

2.

Weigh the EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.5 kg (5.5 lb).

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 9.

8.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

Check if water will drain from EVAP canister (1).
• EVAP canister vent control valve (2)

Does water drain from the EVAP canister?

YES

>> GO TO 9.

NO

>> GO TO 11.

9.

REPLACE EVAP CANISTER

Replace EVAP canister with a new one.

>> GO TO 10.

10.

DETECT MALFUNCTIONING PART

Check the EVAP hose between EVAP canister and vehicle frame for clogging or poor connection.

>> Repair or replace EVAP hose.

11.

CHECK VENT HOSES AND VENT TUBES

Check hoses and tubes between EVAP canister and refueling control valve for clogging, kinks, looseness and
improper connection.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Repair or replace hoses and tubes.

12.

CHECK FILLER NECK TUBE

Check recirculation line for clogging, dents and cracks. 
Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Replace filler neck tube.

13.

CHECK REFUELING EVAP VAPOR CUT VALVE

Refer to 

EC-518, "Component Inspection (EVAP Vapor Cut Valve)"

.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Replace refueling EVAP vapor cut valve with fuel tank.

14.

CHECK FUEL FILLER TUBE

Check filler neck tube and hose connected to the fuel tank for clogging, dents and cracks.

JSBIA0692ZZ