2011 INFINITI QX56 Factory Service Manual

Page 2537 of 5598

INFINITI QX56 2011  Factory Service Manual 
LOW PRESSURE FUEL PUMPEC-513
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK FUEL PUMP CONTROL CIRCUIT
1. Disc

Page 2538 of 5598

INFINITI QX56 2011  Factory Service Manual 
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

Page 2539 of 5598

INFINITI QX56 2011  Factory Service Manual 
MALFUNCTION INDICATOR LAMPEC-515
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
MALFUNCTION INDICATOR LAMP
Component Function CheckINFOID:0000000006218021
1.CHECK MIL FUNCTION
1.

Page 2540 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-516
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
ON BOARD REFUELING VA
POR RECOVERY (ORVR)
Component Function CheckINFOID:0000000006256490
1.CHECK ORVR FUNCTION
Check

Page 2541 of 5598

INFINITI QX56 2011  Factory Service Manual 
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
NP
O
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace refueling EVAP v

Page 2542 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-518
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
ON BOARD REFUELING VAPOR RECOVERY (ORVR)
Is the inspection result normal?
YES >> GO TO 15.
NO >> Replace fuel filler tube.
15.CHECK ONE-WAY FUEL VALVE-I
Check

Page 2543 of 5598

INFINITI QX56 2011  Factory Service Manual 
ON BOARD REFUELING VAPOR RECOVERY (ORVR)EC-519
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
- Apply vacuum pressure to hose end [
−13.3 kPa ( −0.136 kg/cm3,  −1.93 psi)] w

Page 2544 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-520
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
Component Function CheckINFOID:0000000006218026
1.CHECK REFRIGERANT PRESSURE SENSOR FUNCTION
1. Start