Nissan Frontier D22. Instruction — part 341
DTC P1442 EVAP CONTROL SYSTEM
EC-467
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
CAUTION:
●
Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used,
the MIL may come on.
●
If the fuel filler cap is not tightened properly, the MIL may come on.
●
Use only a genuine NISSAN rubber tube as a replacement.
DTC Confirmation Procedure
UBS00DB8
Refer to “DTC P0442 EVAP CONTROL SYSTEM”,
EC-314, "DTC Confirmation Procedure"
Diagnostic Procedure
UBS00DB9
Refer to “DTC P0442 EVAP CONTROL SYSTEM”,
EC-316, "Diagnostic Procedure"
DTC No.
Trouble diagnosis name
DTC detecting condition
Check Items (Possible Cause)
P1442
EVAP control system
small leak detected
(positive pressure)
●
EVAP control system has a
leak.
●
EVAP control system does
not operate properly.
●
Incorrect fuel tank vacuum relief valve
●
Incorrect fuel filler cap used
●
Fuel filler cap remains open or fails to close.
●
Foreign matter caught in fuel filler cap.
●
Leak is in line between intake manifold and EVAP
canister purge volume control solenoid valve.
●
Foreign matter caught in EVAP canister vent control
valve.
●
EVAP canister or fuel tank leaks
●
EVAP purge line (pipe and rubber tube) leaks
●
EVAP purge line rubber tube bent.
●
Blocked or bent rubber tube to EVAP control system
pressure sensor
●
Loose or disconnected rubber tube
●
EVAP canister vent control valve and the circuit
●
EVAP canister purge volume control solenoid valve
and the circuit
●
Fuel tank temperature sensor
●
O-ring of EVAP canister vent control valve is missing
or damaged.
●
Water separator
●
EVAP canister is saturated with water.
●
EVAP control system pressure sensor
●
Fuel level sensor and the circuit
●
Refueling control valve
●
ORVR system leaks
EC-468
[KA24DE]
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
PFP:14920
Description
UBS00DBA
SYSTEM DESCRIPTION
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
UBS00DBB
Specification data are reference values.
Sensor
Input Signal to ECM
ECM function
Actuator
Camshaft position sensor
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
Throttle position switch
Closed throttle position
Heated oxygen sensor 1
Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Fuel tank temperature sensor
Fuel temperature in fuel tank
Vehicle speed sensor
Vehicle speed
SEF337U
MONITOR ITEM
CONDITION
SPECIFICATION
PURG VOL C/V
●
Engine: After warming up
●
Air conditioner switch: OFF
●
Shift lever: P or N
●
No-load
Idle (Vehicle stopped)
0%
2,000 rpm (200 seconds after start-
ing engine)
—
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-469
[KA24DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
On Board Diagnosis Logic
UBS00DBC
DTC Confirmation Procedure
UBS00DBD
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and wait at
least 5 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 C/V P1444” of “EVAP 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 for at
least 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
EC-472, "Diagnostic Procedure"
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-472, "Diagnostic Procedure"
.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1444
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-470
[KA24DE]
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Wiring Diagram
UBS00DBE
BBWA1061E
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст