Infiniti F50. Manual — part 474
DTC P1442 EVAP CONTROL SYSTEM
EC-537
C
D
E
F
G
H
I
J
K
L
M
A
EC
21.
CHECK REFUELING EVAP VAPOR LINE
Check refueling EVAP vapor line between EVAP canister and fuel tank for clogging, kink, looseness and
improper connection. For location, refer to
EC-690, "ON BOARD REFUELING VAPOR RECOVERY (ORVR)"
.
OK or NG
OK
>> GO TO 22.
NG
>> Repair or replace hoses and tubes.
22.
CHECK SIGNAL LINE AND RECIRCULATION LINE
Check signal line and recirculation line between filler neck tube and fuel tank for clogging, kink, cracks, loose-
ness and improper connection.
OK or NG
OK
>> GO TO 23.
NG
>> Repair or replace hoses, tubes or filler neck tube.
23.
CHECK REFUELING CONTROL VALVE
Refer to
EC-693, "Component Inspection"
OK or NG
OK
>> GO TO 24.
NG
>> Replace refueling control valve with fuel tank.
24.
CHECK FUEL LEVEL SENSOR
Refer to
DI-26, "CHECK FUEL LEVEL SENSOR UNIT"
.
OK or NG
OK
>> GO TO 25.
NG
>> Replace fuel level sensor unit.
25.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
EBS00MKL
WATER SEPARATOR
1.
Check visually for insect nests in the water separator air inlet.
2.
Check visually for cracks or flaws in the appearance.
3.
Check visually for cracks or flaws in the hose.
4.
Check that A and C are not clogged by blowing air into B with
A , and then C plugged.
5.
In case of NG in items 2 - 4, replace the parts.
NOTE:
●
Do not disassemble water separator.
PBIB1032E
EC-538
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
PFP:14920
Description
EBS00MKM
SYSTEM DESCRIPTION
*: This signal is sent to the ECM through CAN communication.
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 Mode
EBS00MKN
Specification data are reference values.
Sensor
Input Signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
EVAP canister
purge flow control
EVAP canister purge volume
control solenoid valve
Mass air flow sensor
Amount of intake air
Engine coolant temperature sensor
Engine coolant temperature
Ignition switch
Start signal
Throttle position sensor
Throttle position
Accelerator pedal position switch
Accelerator pedal position
Heated oxygen sensors 1
Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Wheel sensor*
Vehicle speed
SEF337U
MONITOR ITEM
CONDITION
SPECIFICATION
PURG VOL C/V
●
Engine: After warming up
●
Selector lever: P or N
●
Air conditioner switch: OFF
●
No load
Idle
0%
2,000 rpm
—
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-539
C
D
E
F
G
H
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J
K
L
M
A
EC
On Board Diagnosis Logic
EBS00MKO
DTC Confirmation Procedure
EBS00MKP
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Always perform test at a temperature of 5
°
C (41
°
F) or more.
WITH CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch “OFF” and wait at least 10 seconds.
3.
Turn ignition switch “ON”.
4.
Select “PURG VOL CN/V P1444” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with
CONSULT-II.
5.
Touch “START”.
6.
Start engine and let it idle until “TESTING” on CONSULT-II changes to “COMPLETED”. (It will take
approximately 10 seconds.)
If “TESTING” is not displayed after 5 minutes, retry from step 2.
7.
Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to
.
WITH GST
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch “OFF” and wait at least 10 seconds.
3.
Start engine and let it idle for at least 20 seconds.
4.
Select “MODE 7” with GST.
5.
If 1st trip DTC is detected, go to
EC-541, "Diagnostic Procedure"
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1444
1444
EVAP canister purge
volume control solenoid
valve
The canister purge flow is detected during the
specified driving conditions, even when EVAP
canister purge volume control solenoid valve is
completely closed.
●
EVAP control system pressure sensor
●
EVAP canister purge volume control
solenoid valve
(The valve is stuck open.)
●
EVAP canister vent control valve
●
EVAP canister
●
Hoses
(Hoses are connected incorrectly or
clogged.)
PBIB0839E
EC-540
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Wiring Diagram
EBS00MKQ
TBWM0039E
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