2007 INFINITI QX56 Factory Service Manual

wheelbase belt garage door opener mirror transmission oil cooling

Page 1449 of 3061

INFINITI QX56 2007 Factory Service Manual EC-366
< SERVICE INFORMATION >
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VA LV E
DescriptionINFOID:0000000003531859
SYSTEM DESCR

EC-366
< SERVICE INFORMATION >
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VA LV E
DescriptionINFOID:0000000003531859
SYSTEM DESCRIPTION
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass pas-
sage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is
determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor
from the EVAP canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of fuel vapor that will flow through the valve.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003531860
Specification data are reference values.
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
1
EVAP canister
purge flow controlEVAP canister purge vol-
ume control solenoid valve Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Battery
Battery voltage*
1
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Air fuel ratio (A/F) sensor 1Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Fuel tank temperature sensor Fuel temperature in fuel tank
Wheel sensor
Vehicle speed*
2
PBIB2057E
MONITOR ITEM CONDITION SPECIFICATION
PURG VOL C/V• Engine: After warming up
• Air conditioner switch: OFF
• Selector lever: P or N
•No loadIdle
(Accelerator pedal: Not depressed
even slightly, after starting engine)0%
2,000 rpm —

Page 1450 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-367
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
On Board Diagnosis LogicINFOID:0000000003531861
DTC Confirmation ProcedureINF

Page 1451 of 3061

INFINITI QX56 2007 Factory Service Manual EC-368
< SERVICE INFORMATION >
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Wiring Diagram
INFOID:0000000003531863
Specification data are reference values and are measured between each

Page 1452 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-369
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
Do not use ECM ground terminals when measuring input/output voltage. Doing so

Page 1453 of 3061

INFINITI QX56 2007 Factory Service Manual EC-370
< SERVICE INFORMATION >
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
4. Check voltage between EVAP canister purge volume control
solenoid valve terminal 1 and ground with CONSULT

Page 1454 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-371
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
4. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. C

Page 1455 of 3061

INFINITI QX56 2007 Factory Service Manual EC-372
< SERVICE INFORMATION >
DTC P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
>> Repair hose or replace EVAP canister.
13.CHECK INTERMITTENT INCIDENT
Refer to EC-138
.
>>INSPECTION END
C

Page 1456 of 3061

INFINITI QX56 2007 Factory Service Manual DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-373
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLE-
NOID VALVE

DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-373
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLE-
NOID VALVE
DescriptionINFOID:0000000003531867
SYSTEM DESCRIPTION
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass pas-
sage in the EVAP canister purge volume control solenoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is
determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor
from the EVAP canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of fuel vapor that will flow through the valve.
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000003531868
Specification data are reference values.
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
1
EVAP canister
purge flow controlEVAP canister purge vol-
ume control solenoid valve Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Battery
Battery voltage*
1
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Air fuel ratio (A/F) sensor 1Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Fuel tank temperature sensor Fuel temperature in fuel tank
Wheel sensor
Vehicle speed*
2
PBIB2057E
MONITOR ITEM CONDITION SPECIFICATION
PURG VOL C/V• Engine: After warming up
• Air conditioner switch: OFF
• Selector lever: P or N
• No loadIdle
(Accelerator pedal: Not depressed
even slightly, after starting engine)0%
2,000 rpm —

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