Page 1609 of 3924
![INFINITI FX35 2008 Service Manual
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-369
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Diagnosis ProcedureINFOID:0000000001326197
1.CHECK RUBBER TUBE
1. Turn ignition swit INFINITI FX35 2008 Service Manual
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-369
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Diagnosis ProcedureINFOID:0000000001326197
1.CHECK RUBBER TUBE
1. Turn ignition swit](/manual-img/42/57017/w960_57017-1608.png)
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-369
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Diagnosis ProcedureINFOID:0000000001326197
1.CHECK RUBBER TUBE
1. Turn ignition switch OFF.
2. Disconnect rubber tube connected to EV AP 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-364, "
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 c ontrol valve and EVAP control system pressure sensor
attached.
2. Does water drain from the EVAP canister?
Ye s o r N o
Yes >> GO TO 4.
No >> GO TO 6.
4.CHECK EVAP CANISTER
Weigh the EVAP canister with the EV AP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
11 7 R / Y EVAP canister vent control
valve [Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
PBIB1611E
PBIB1031E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
Page 1610 of 3924
![INFINITI FX35 2008 Service Manual
EC-370
< SERVICE INFORMATION >[VQ35DE]
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
Check the following.
EVAP canister for damage
EVAP hose between EVAP canister and vehicle frame for clogging or p INFINITI FX35 2008 Service Manual
EC-370
< SERVICE INFORMATION >[VQ35DE]
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
Check the following.
EVAP canister for damage
EVAP hose between EVAP canister and vehicle frame for clogging or p](/manual-img/42/57017/w960_57017-1609.png)
EC-370
< SERVICE INFORMATION >[VQ35DE]
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
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 SY STEM PRESSURE SENSOR
Refer to EC-380, "
Component Inspection".
OK or NG
OK >> GO TO 8.
NG >> Replace EVAP control system pressure sensor.
8.CHECK INTERMITTENT INCIDENT
Refer to EC-139
.
>> INSPECTION END
Component InspectionINFOID:0000000001326198
EVAP CANISTER VENT CONTROL VALVE
With CONSULT-III
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 all 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-III
1. Remove EVAP canister vent control valve from EVAP canister. Water should not exist.
Condition VENT CONTROL/V Air passage continuity between A and B
ON No
OFF Yes
PBIB1033E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
Page 1611 of 3924
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-371
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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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
Page 1612 of 3924
![INFINITI FX35 2008 Service Manual
EC-372
< SERVICE INFORMATION >[VQ35DE]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000001326199
The EVAP control syste INFINITI FX35 2008 Service Manual
EC-372
< SERVICE INFORMATION >[VQ35DE]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000001326199
The EVAP control syste](/manual-img/42/57017/w960_57017-1611.png)
EC-372
< SERVICE INFORMATION >[VQ35DE]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000001326199
The EVAP control system pressure sens or detects pressure in the purge line. The sensor output voltage to the
ECM increases as pressure increases.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001326200
Specification data are reference values.
On Board Diagn osis LogicINFOID:0000000001326201
NOTE:
If DTC P0451 is displayed with DTC P0643, firs t perform the trouble diagnosis for DTC P0643.
Refer to EC-424
.
DTC Confirmation ProcedureINFOID:0000000001326202
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
1. Start engine and wait at least 40 seconds. NOTE:
Do not depress accelerator pedal even slightly.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to EC-373, "
Diagnosis Procedure".
PBIB1611E
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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
Page 1613 of 3924
![INFINITI FX35 2008 Service Manual
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-373
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Diagnosis ProcedureINFOID:0000000001326203
1.CHECK GROUND CONNECTIONS
1. Turn ign INFINITI FX35 2008 Service Manual
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-373
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Diagnosis ProcedureINFOID:0000000001326203
1.CHECK GROUND CONNECTIONS
1. Turn ign](/manual-img/42/57017/w960_57017-1612.png)
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-373
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Diagnosis ProcedureINFOID:0000000001326203
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screw on the body. Refer to EC-144, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK EVPA CONTROL SYS TEM PRESSURE SENSOR CONNECTOR FOR WATER
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check sensor harness connector for water.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness connector.
3.CHECK EVAP CONTROL SYS TEM PRESSURE SENSOR
Refer to EC-373, "
Component Inspection".
OK or NG
OK >> GO TO 4.
NG >> Replace EVAP control system pressure sensor.
4.CHECK INTERMITTENT INCIDENT
Refer to EC-139
.
For Wiring Diagram, refer to EC-377
.
>> INSPECTION END
Component InspectionINFOID:0000000001326204
EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pr essure sensor with its harness connec tor connected from EVAP canister.
Always replace O-ring with a new one.
2. Install a vacuum pump to EVAP control system pressure sensor.
PBIB2625E
Water should not exist.
PBIB1611E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
Page 1614 of 3924
EC-374
< SERVICE INFORMATION >[VQ35DE]
DTC P0451 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 kP a (-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
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C
Page 1615 of 3924
![INFINITI FX35 2008 Service Manual
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-375
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DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000 INFINITI FX35 2008 Service Manual
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-375
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DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000](/manual-img/42/57017/w960_57017-1614.png)
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-375
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DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000001326205
The EVAP control system pressure sens
or detects pressure in the purge line. The sensor output voltage to the
ECM increases as pressure increases.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000001326206
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001326207
NOTE:
If DTC P0452 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to EC-424
.
DTC Confirmation ProcedureINFOID:0000000001326208
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, 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-III
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
PBIB1611E
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 in-
put An excessively low voltage from the sensor is
sent to ECM. Harness or connectors
(EVAP control system pressure sensor
circuit is open or shorted.)
EVAP control system pressure sensor
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
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Page 1616 of 3924
EC-376
< SERVICE INFORMATION >[VQ35DE]
DTC P0452 EVAP CONTROL
SYSTEM PRESSURE SENSOR
3. Turn ignition switch ON.
4. Select “DATA MONITOR” mode with CONSULT-III.
5. Make sure that “FUEL T/TMP SE” is more than 0°C (32 °F).
6. Start engine and wait at least 20 seconds.
7. Check 1st trip DTC.
8. If 1st trip DTC is detected, go to EC-378, "
Diagnosis 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-378, "
Diagnosis Procedure".
PBIB1110E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C