2005 INFINITI QX4 Factory Service Manual

turn signal bulb sport mode wiring diagram driver seat adjustment fuse box diagram TPMS reset

Page 1721 of 3419

INFINITI QX4 2005 Factory Service Manual EC-530Revision: October 2005
DTC P1279, P1289 A/F SENSOR 1
2005 QX56
11 . CHECK PCV VALVE
Refer to EC-45, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Repair or replace PCV valve.
12. CHE

Page 1722 of 3419

INFINITI QX4 2005 Factory Service Manual DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-531
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DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
PFP:14920
Descr

DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-531
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DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
PFP:14920
DescriptionUBS00HAT
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 ModeUBS00HAU
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*
2Vehicle speed
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 1723 of 3419

INFINITI QX4 2005 Factory Service Manual EC-532Revision: October 2005
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
2005 QX56
On Board Diagnosis LogicUBS00HAV
DTC Confirmation ProcedureUBS00HAW
NOTE:
If DTC Confirmation Procedu

Page 1724 of 3419

INFINITI QX4 2005 Factory Service Manual DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-533
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Revision: October 20052005 QX56
Wiring DiagramUBS00HAX
BBWA1687E

Page 1725 of 3419

INFINITI QX4 2005 Factory Service Manual EC-534Revision: October 2005
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
2005 QX56
Specification data are reference values and are measured between each terminal and ground.
Pulse sign

Page 1726 of 3419

INFINITI QX4 2005 Factory Service Manual DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-535
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Revision: October 20052005 QX56
Diagnostic ProcedureUBS00HAY
1. CHECK EVAP CANISTER PURGE VOLUME CONTROL SO

Page 1727 of 3419

INFINITI QX4 2005 Factory Service Manual EC-536Revision: October 2005
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
2005 QX56
4. CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sen

Page 1728 of 3419

INFINITI QX4 2005 Factory Service Manual DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-537
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Revision: October 20052005 QX56
10. CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister wit

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