Nissan Pathfinder (2006 year). Manual — part 195
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-419
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EC
2006 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-420, "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-420
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
2006 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
EC-430, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace EVAP control system pressure sensor.
8.
CHECK INTERMITTENT INCIDENT
EC-144, "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-421
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EC
2006 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-422
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
2006 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-479, "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
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-423
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EC
2006 Pathfinder
DTC Confirmation Procedure
UBS00K9O
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 OFF and wait at least 10 seconds.
2.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
3.
Start engine and wait at least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
If 1st trip DTC is detected, go to
EC-423, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic Procedure
UBS00K9P
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK EVPA CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1.
Disconnect EVAP control system pressure sensor harness con-
nector.
2.
Check sensor harness connector for water.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness connector.
SEF194Y
BBIA0539E
Water should not exist.
BBIA0551E
EC-424
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
2006 Pathfinder
3.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-424, "Component Inspection"
OK or NG
OK
>> GO TO 4.
NG
>> Replace EVAP control system pressure sensor.
4.
CHECK INTERMITTENT INCIDENT
EC-144, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
For Wiring Diagram, refer to
.
>> INSPECTION END
Component Inspection
UBS00K9Q
EVAP CONTROL SYSTEM PRESSURE SENSOR
1.
Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Do not reuse the O-ring, replace it with a new one.
2.
Install a vacuum pump to EVAP control system pressure sensor.
3.
Turn ignition switch ON and check output voltage between ECM
terminal 32 and ground under the following conditions.
CAUTION:
●
Always calibrate the vacuum pump gauge when using it.
●
Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or
pressure over 101.3 kPa (760 mmHg, 29.92 inHg).
4.
If NG, replace EVAP control system pressure sensor.
Applied vacuum kPa
(mmHg, inHg)
Voltage V
Not applied
1.8 - 4.8
-26.7 (-200, -7.87)
2.1 to 2.5V lower than above value
PBIB1173E
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-425
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EC
2006 Pathfinder
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
PFP:25085
Component Description
UBS00K9R
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
UBS00K9S
Specification data are reference values.
On Board Diagnosis Logic
UBS00K9T
If DTC P0452 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
EC-479, "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
P0452
0452
EVAP control system
pressure sensor low
input
An excessively low voltage from the sensor is
sent to ECM.
●
Harness or connectors
(The sensor circuit is open or shorted.)
●
EVAP control system pressure sensor
EC-426
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
2006 Pathfinder
DTC Confirmation Procedure
UBS00K9U
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 “DATA MONITOR” mode with CONSULT-II.
5.
Make sure that “FUEL T/TMP SE” is more than 0
°
C (32
°
F).
6.
Start engine and wait at least 20 seconds.
If 1st trip DTC is detected, go to
EC-428, "Diagnostic Procedure"
.
WITH GST
1.
Start engine and warm it up to normal operating temperature.
2.
Check that voltage between ECM terminal 107 (Fuel tank tem-
perature sensor signal) and ground is less than 4.2V.
3.
Turn ignition switch OFF and wait at least 10 seconds.
4.
Start engine and wait at least 20 seconds.
5.
Select Service $07 with GST.
If 1st trip DTC is detected, go to
EC-428, "Diagnostic Procedure"
.
SEF194Y
PBIB1110E
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