2008 NISSAN LATIO sensor

DTC P0447 EVAP CANISTER VENT CONTROL VALVE
EC-341
< SERVICE INFORMATION >
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Diagnosis ProcedureINFOID:0000000001702849
1.INSPECTION START
1. Do you have CONSULT-II?
Ye s o r N o
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.
OK or NG
OK >> GO TO 8.
NG >> GO TO 3.
3.CHECK EVAP CANISTER VENT CONTROL VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister vent control valve (3) harness con-
nector.
- EVAP control system pressure sensor (1)
- EVAP canister (2)
3. Turn ignition switch ON.
TER-
MI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
28 WEVAP canister vent control
valve[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
32 PECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition
switch OFF0 - 1.0V
[Ignition switch: OFF]
• More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
105 G Power supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
Clicking noise should be heard.
PBIB1787E
BBIA0693E

DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-345
< SERVICE INFORMATION >
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DTC P0448 EVAP CANISTER VENT CONTROL VALVE
Component DescriptionINFOID:0000000001702851
The EVAP canister vent control valve (3) is located on the EVAP
canister (2) 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 diagnoses.
• EVAP control system pressure sensor (1)
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000001702852
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001702853
DTC Confirmation ProcedureINFOID:0000000001702854
CAUTION:
Always drive vehicle at a safe speed.
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.
PBIB1263E
BBIA0693E
MONITOR ITEM CONDITION SPECIFICATION
VENT CONT/V • Ignition switch: ON OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0448
0448EVAP canister vent con-
trol valve closeEVAP 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

EC-348
< SERVICE INFORMATION >
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
Diagnosis Procedure
INFOID:0000000001702856
1.CHECK RUBBER TUBE
1. Turn ignition switch OFF.
2. Disconnect rubber tube connected to EVAP canister vent control valve (3).
3. Check the rubber tube for clogging.
- EVAP control system pressure sensor (1)
- EVAP canister (2)
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-349, "
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 attached.
2. Does water drain from the EVAP canister.
Ye s o r N o
Ye s > > G O T O 4 .
No >> GO TO 6.
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 1.9 kg (4.2 lb).
OK or NG
TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
28 WEVAP canister vent control
valve[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
32 PECM relay
(Self shut-off)[Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition
switch OFF0 - 1.0V
[Ignition switch: OFF]
• More than a few seconds after turning igni-
tion switch OFFBATTERY VOLTAGE
(11 - 14V)
105 G Power supply for ECM[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
BBIA0693E
PBIB1213E

DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-349
< SERVICE INFORMATION >
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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 (1) harness
connector.
- EVAP canister (2)
- EVAP canister vent control valve (3)
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-369, "
Component Inspection".
OK or NG
OK >> GO TO 8.
NG >> Replace EVAP control system pressure sensor.
8.CHECK INTERMITTENT INCIDENT
Refer to EC-136
.
>>INSPECTION END
Component InspectionINFOID:0000000001702857
EVAP CANISTER VENT CONTROL VALVE
With CONSULT-II
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion Bof 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.
BBIA0693E
PBIB1033E

DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-351
< SERVICE INFORMATION >
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DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000001702858
The EVAP control system pressure sensor (1) detects pressure in
the purge line. The sensor output voltage to the ECM increases as
pressure increases.
• EVAP canister (2)
• EVAP canister vent control valve (3)
CONSULT-II Reference Value in Data Monitor ModeINFOID:0000000001702859
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001702860
DTC Confirmation ProcedureINFOID:0000000001702861
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.
BBIA0693E
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
0451EVAP control system
pressure sensor perfor-
manceECM detects a sloshing signal from the EVAP
control system pressure sensor• Harness or connectors
[Crankshaft position sensor (POS) circuit
is shorted.]
(Accelerator pedal position sensor circuit
is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
• EVAP control system pressure sensor
• Crankshaft position sensor (POS)
• Accelerator pedal position sensor
• Refrigerant pressure sensor

EC-352
< SERVICE INFORMATION >
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
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-352, "
Diagnosis Procedure".
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnosis ProcedureINFOID:0000000001702862
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to EC-142, "
Ground Inspection".
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 (1) harness
connector.
- EVAP canister (2)
- EVAP canister vent control valve (3)
2. Check sensor harness connector for water.
OK or NG
OK >> GO TO 3.
NG >> Repair or replace harness connector.
3.CHECK COMPONENTS POWER SUPPLY
Check harness for short to power and short to ground, between the following terminals.
SEF194Y
:Vehicle front
1. Body ground E24 2. Engine ground F9 3. engine ground F16
4. Body ground E15
BBIA0698E
Water should not exist.
BBIA0693E

DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-353
< SERVICE INFORMATION >
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OK or NG
OK >> GO TO 4.
NG >> Repair short to ground or short to power in harness or connectors.
4.CHECK COMPONENTS
Check the following.
• Refrigerant pressure sensor (Refer to MTC-22
.)
• Crankshaft position sensor (POS) (Refer to EC-301, "
Component Inspection".)
OK or NG
OK >> GO TO 5.
NG >> Replace malfunctioning components.
5.CHECK APP SENSOR
Refer to EC-485, "
Component Inspection".
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-76, "
Accelerator Pedal Released Position Learning".
3. Perform EC-76, "
Throttle Valve Closed Position Learning".
4. Perform EC-76, "
Idle Air Volume Learning".
>>INSPECTION END
7.CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to EC-353, "
Component Inspection".
OK or NG
OK >> GO TO 8.
NG >> Replace EVAP control system pressure sensor.
8.CHECK INTERMITTENT INCIDENT
Refer to EC-136
.
For wiring diagram, refer to EC-357, "
Wiring Diagram".
>>INSPECTION END
Component InspectionINFOID:0000000001702863
EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one.
2. Install a vacuum pump to EVAP control system pressure sensor.
ECM terminal Sensor terminal Reference Wiring Diagram
74 Refrigerant pressure sensor terminal 3EC-542, "
Wiring Diagram"
75 Crankshaft position sensor (POS) terminal 1EC-297, "Wiring Diagram"
76 EVAP control system pressure sensor terminal 3EC-357, "Wiring Diagram"
102 APP sensor terminal 5EC-482, "Wiring Diagram"

EC-354
< SERVICE INFORMATION >
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
3. Turn ignition switch ON and check output voltage between ECM
terminal 42 (EVAP control system pressure sensor signal) 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
PBIB3314E