Nissan Pathfinder (2005 year). Instruction — part 186
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
EC-339
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2005 Pathfinder
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
PFP:14935
Component Description
UBS00K9E
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
UBS00K9F
Specification data are reference values.
On Board Diagnosis Logic
UBS00K9G
PBIB1263E
BBIA0551E
MONITOR ITEM
CONDITION
SPECIFICATION
VENT CONT/V
●
Ignition switch: ON
OFF
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0447
0447
EVAP canister vent con-
trol valve circuit open
An improper voltage signal is sent to ECM
through EVAP canister vent control valve.
●
Harness or connectors
(The valve circuit is open or shorted.)
●
EVAP canister vent control valve
EC-340
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
2005 Pathfinder
DTC Confirmation Procedure
UBS00K9H
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:
Before performing the following procedure, confirm battery voltage is more than 11V at idle.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Start engine and wait at least 8 seconds.
4.
If 1st trip DTC is detected, go to
EC-342, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
EC-341
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Wiring Diagram
UBS00K9I
BBWA1755E
EC-342
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
2005 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
UBS00K9J
1.
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes
>> GO TO 2.
No
>> GO TO 3.
2.
CHECK EVAP CANISTER VENT CONTROL VALVE CIRCUIT
With CONSULT-II
1.
Turn ignition switch OFF and then turn ON.
2.
Select “VENT CONTROL/V” in “ACTIVE TEST” mode with CONSULT-II.
3.
Touch “ON/OFF” on CONSULT-II screen.
4.
Check for operating sound of the valve.
Clicking noise should be heard.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 3.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
117
G
EVAP canister vent control
valve
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
PBIB1679E
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
EC-343
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2005 Pathfinder
3.
CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect EVAP canister vent control valve harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between EVAP canister vent control valve termi-
nal 1 and ground with CONSULT-II or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E41, C1
●
Harness for open or short between EVAP canister vent control valve and IPDM E/R
>> Repair harness or connectors.
5.
CHECK EVAP CANISTER VENT CONTROL VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND
SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminal 117 and EVAP canister vent control valve terminal 2.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 6.
6.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors C1, E41
●
Harness for open or short between EVAP canister vent control valve and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
BBIA0551E
Voltage: Battery voltage
PBIB0152E
Continuity should exist.
EC-344
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
2005 Pathfinder
7.
CHECK RUBBER TUBE FOR CLOGGING
1.
Disconnect rubber tube connected to EVAP canister vent control valve.
2.
Check the rubber tube for clogging.
OK or NG
OK
>> GO TO 8.
NG
>> Clean the rubber tube using an air blower.
8.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to
EC-344, "Component Inspection"
.
OK or NG
OK
>> GO TO 9.
NG
>> Replace EVAP canister vent control valve.
9.
CHECK INTERMITTENT INCIDENT
Refer to
EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
UBS00K9K
EVAP CANISTER VENT CONTROL VALVE
With 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.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
3.
Reconnect harness connectors disconnected.
4.
Turn ignition switch ON.
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.
PBIB1033E
Condition VENT CONTROL/V
Air passage continuity between A and B
ON
No
OFF
Yes
PBIB1679E
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
EC-345
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2005 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-346
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
2005 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 P1229, first perform the trouble diagnosis for DTC P1229. Refer to
EC-478, "DTC P1229 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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