Nissan Pathfinder (2007 year). Manual — part 193
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
EC-411
C
D
E
F
G
H
I
J
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L
M
A
EC
2007 Pathfinder
2.
Check portion B of EVAP canister vent control valve for being
rusted.
3.
Check air passage continuity and operation delay time under the
following conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
4.
Clean the air passage (portion A to B ) of EVAP canister vent control valve using an air blower.
5.
Perform step 3 again.
PBIB1033E
Condition
Air passage continuity
between (A) and (B)
12V direct current supply between
terminals 1 and 2
No
OFF
Yes
PBIB1034E
EC-412
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
2007 Pathfinder
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
PFP:16935
Component Description
UBS00KFO
The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows EVAP
Control System diagnosis.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KFP
Specification data are reference values.
On Board Diagnosis Logic
UBS00KFQ
PBIB1263E
BBIA0551E
MONITOR ITEM
CONDITION
SPECIFICATION
VENT CONT/V
●
Ignition switch: ON
OFF
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0448
0448
EVAP canister vent con-
trol valve close
EVAP canister vent control valve remains
closed under specified driving conditions.
●
EVAP canister vent control valve
●
EVAP control system pressure sensor
and the circuit
●
Blocked rubber tube to EVAP canister
vent control valve
●
EVAP canister is saturated with water
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-413
C
D
E
F
G
H
I
J
K
L
M
A
EC
2007 Pathfinder
DTC Confirmation Procedure
UBS00KFR
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.
WITH CONSULT-II
1.
Turn ignition switch ON and wait at least 5 seconds.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
4.
Start engine and let it idle for at least 1 minute.
5.
Repeat next procedures 3 times.
a.
Increase the engine speed up to 3,000 to 3,500 rpm and keep it
for 2 minutes and 50 seconds to 3 minutes.
Never exceed 3 minutes.
b.
Fully released accelerator pedal and keep engine idle for about
5 seconds.
6.
If 1st trip DTC is detected, go to
EC-415, "Diagnostic Procedure"
.
If 1st trip DTC is not detected, go to the next step.
7.
Repeat next procedure 20 times.
a.
Quickly increase the engine speed up to 4,000 to 4,500 rpm or more and keep it for 25 to 30 seconds.
b.
Fully released accelerator pedal and keep engine idle for at least 35 seconds.
8.
If 1st trip DTC is detected, go to
EC-415, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y
PBIB0972E
EC-414
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
2007 Pathfinder
Wiring Diagram
UBS00KFS
BBWA1755E
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-415
C
D
E
F
G
H
I
J
K
L
M
A
EC
2007 Pathfinder
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
UBS00KFT
1.
CHECK RUBBER TUBE
1.
Turn ignition switch OFF.
2.
Disconnect rubber tube connected to EVAP canister vent control
valve.
3.
Check the rubber tube for clogging.
OK or NG
OK
>> GO TO 2.
NG
>> Clean rubber tube using an air blower.
2.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to
EC-416, "Component Inspection"
OK or NG
OK
>> GO TO 3.
NG
>> Replace EVAP canister vent control valve.
3.
CHECK IF EVAP CANISTER SATURATED WITH WATER
1.
Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.
2.
Check if water will drain from the EVAP canister.
Yes or No
Yes
>> GO TO 4.
No
>> GO TO 6.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
111
BR
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch: OFF]
●
For a few seconds after turning ignition
switch OFF
0 - 1.5V
[Ignition switch: OFF]
●
More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
117
G
EVAP canister vent control
valve
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
BBIA0551E
BBIA0558E
EC-416
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
2007 Pathfinder
4.
CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.0 kg (4.4 lb).
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
●
EVAP canister for damage
●
EVAP hose between EVAP canister and vehicle frame for clogging or poor connection
>> Repair hose or replace EVAP canister.
6.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1.
Disconnect EVAP control system pressure sensor harness connector.
2.
Check connectors for water.
OK or NG
OK
>> GO TO 7.
NG
>> Replace EVAP control system pressure sensor.
7.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to
EC-426, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace EVAP control system pressure sensor.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
UBS00KFU
EVAP CANISTER VENT CONTROL VALVE
With CONSULT-II
1.
Remove EVAP canister vent control valve from EVAP canister.
2.
Check portion of B EVAP canister vent control valve for being
rusted.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
3.
Reconnect harness connectors disconnected.
4.
Turn ignition switch ON.
Water should not exist.
PBIB1033E
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-417
C
D
E
F
G
H
I
J
K
L
M
A
EC
2007 Pathfinder
5.
Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
6.
Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
7.
Clean the air passage (portion A to B ) of EVAP canister vent control valve using an air blower.
8.
Perform step 6 again.
Without CONSULT-II
1.
Remove EVAP canister vent control valve from EVAP canister.
2.
Check portion B of EVAP canister vent control valve for being
rusted.
3.
Check air passage continuity and operation delay time under the
following conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
4.
Clean the air passage (portion A to B ) of EVAP canister vent control valve using an air blower.
5.
Perform step 3 again.
Condition VENT CONTROL/V
Air passage continuity
between (A) and (B)
ON
No
OFF
Yes
PBIB1679E
PBIB1033E
Condition
Air passage continuity
between (A) and (B)
12V direct current supply between
terminals 1 and 2
No
OFF
Yes
PBIB1034E
EC-418
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
2007 Pathfinder
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
PFP:22365
Component Description
UBS00K9L
The EVAP control system pressure sensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as pres-
sure increases.
CONSULT-II Reference Value in Data Monitor Mode
UBS00K9M
Specification data are reference values.
On Board Diagnosis Logic
UBS00K9N
If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
EC-475, "DTC P0643 SENSOR POWER SUPPLY"
.
BBIA0551E
PBIB1207E
MONITOR ITEM
CONDITION
SPECIFICATION
EVAP SYS PRES
●
Ignition switch: ON
Approx. 1.8 - 4.8V
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0451
0451
EVAP control system
pressure sensor perfor-
mance
ECM detects a sloshing signal from the EVAP
control system pressure sensor
●
Harness or connectors
●
EVAP control system pressure sensor
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