Page 2137 of 3787
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-843
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
a. Increase the engine speed up to 3,000 to 3,500 rpm and keep it for 2 minutes and 50 seconds to 3 min-
utes.
Never exceed 3 minutes.
b. Fully released accelerator pedal and keep engine idle for about 5 seconds.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-845, "
Diagnosis 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. Check 1st trip DTC.
9. If 1st trip DTC is detected, go to EC-845, "
Diagnosis Procedure".
PBIB0972E
Revision: May 2010 2011 Versa
Page 2138 of 3787
EC-844
< SERVICE INFORMATION >[MR18DE]
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
Wiring Diagram
INFOID:0000000006342012
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. Doi ng so may result in dam-
age to the ECM's transistor. Use a ground ot her than ECM terminals, such as the ground.
AABWA0224GB
Revision: May 2010 2011 Versa
Page 2139 of 3787
![NISSAN LATIO 2011 Service Repair Manual DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-845
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Diagnosis ProcedureINFOID:0000000006342013
1.CHECK RUBBER TUBE
1. Turn ignition switc NISSAN LATIO 2011 Service Repair Manual DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-845
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Diagnosis ProcedureINFOID:0000000006342013
1.CHECK RUBBER TUBE
1. Turn ignition switc](/manual-img/5/57357/w960_57357-2138.png)
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-845
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Diagnosis ProcedureINFOID:0000000006342013
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 DRAIN FILTER
Refer to EC-814, "
Component Inspection".
OK or NG
OK >> GO TO 3.
NG >> Replace drain filter.
3.CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to EC-840, "
Component Inspection".
OK or NG
OK >> GO TO 4.
NG >> Replace EVAP canister vent control valve.
4.CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP c anister vent control valve attached.
TER-
MI-
NAL
NO. WIRE
COLOR ITEM
CONDITION DATA (DC Voltage)
28 W EVAP canister vent control
valve [Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
32 P ECM relay
(Self shut-off) [Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition
switch OFF 0 - 1.0 V
[Ignition switch: OFF]
• More than a few seconds after turning igni- tion switch OFF BATTERY VOLTAGE
(11 - 14 V)
105 G Power supply for ECM [Ignition switch: ON] BATTERY VOLTAGE
(11 - 14 V)
BBIA0693E
Revision: May 2010 2011 Versa
Page 2140 of 3787
![NISSAN LATIO 2011 Service Repair Manual EC-846
< SERVICE INFORMATION >[MR18DE]
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
2. Does water drain from the EVAP canister.
Ye s o r N o
Ye s > > G O T O 5 .
No >> GO TO 7.
5.CHECK EVAP CANISTER NISSAN LATIO 2011 Service Repair Manual EC-846
< SERVICE INFORMATION >[MR18DE]
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
2. Does water drain from the EVAP canister.
Ye s o r N o
Ye s > > G O T O 5 .
No >> GO TO 7.
5.CHECK EVAP CANISTER](/manual-img/5/57357/w960_57357-2139.png)
EC-846
< SERVICE INFORMATION >[MR18DE]
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
2. Does water drain from the EVAP canister.
Ye s o r N o
Ye s > > G O T O 5 .
No >> GO TO 7.
5.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
OK >> GO TO 7.
NG >> GO TO 6.
6.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.
7.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 8.
NG >> Replace EVAP control system pressure sensor.
8.CHECK EVAP CONTROL SY STEM PRESSURE SENSOR
Refer to EC-850, "
Component Inspection".
OK or NG
OK >> GO TO 9.
NG >> Replace EVAP control system pressure sensor.
9.CHECK INTERMITTENT INCIDENT
Refer to EC-632
.
>> INSPECTION END
Component InspectionINFOID:0000000006342014
EVAP CANISTER VENT CONTROL VALVE
PBIB1213E
Water should not exist.
BBIA0693E
Revision: May 2010 2011 Versa
Page 2141 of 3787
![NISSAN LATIO 2011 Service Repair Manual DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-847
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
With CONSULT-III
1. Remove EVAP canister vent c
ontrol valve from EVAP canister.
2. NISSAN LATIO 2011 Service Repair Manual DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-847
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
With CONSULT-III
1. Remove EVAP canister vent c
ontrol valve from EVAP canister.
2.](/manual-img/5/57357/w960_57357-2140.png)
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-847
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
With CONSULT-III
1. Remove EVAP canister vent c
ontrol 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, 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. If NG, replace EVAP canister vent control valve.
Without CONSULT-III
1. Remove EVAP canister vent c ontrol 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, 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. If NG, replace EVAP canister vent control valve.
PBIB1033E
Condition VENT CONTROL/V Air passage continuity between A and B
ON No
OFF Yes
PBIB1033E
ConditionAir passage continuity between A and B
12 V direct current supply between
terminals 1 and 2 No
OFF Yes
PBIB1034E
Revision: May 2010 2011 Versa
Page 2142 of 3787
![NISSAN LATIO 2011 Service Repair Manual EC-848
< SERVICE INFORMATION >[MR18DE]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000006342015
The EVAP control system NISSAN LATIO 2011 Service Repair Manual EC-848
< SERVICE INFORMATION >[MR18DE]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000006342015
The EVAP control system](/manual-img/5/57357/w960_57357-2141.png)
EC-848
< SERVICE INFORMATION >[MR18DE]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component DescriptionINFOID:0000000006342015
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-III Reference Value in Data Monitor ModeINFOID:0000000006342016
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000006342017
DTC Confirmation ProcedureINFOID:0000000006342018
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.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and wait at least 40 seconds.
NOTE:
BBIA0693E
PBIB1207E
Monitor item Condition Specification
EVAP SYS PRES • Ignition switch: ON Approx. 1.8 - 4.8 V
DTC No. Trouble diagnosis nameDTC 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
[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
Revision: May 2010 2011 Versa
Page 2143 of 3787
![NISSAN LATIO 2011 Service Repair Manual DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-849
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Do not depress accelerator pedal even slightly.
3. Check 1st trip DTC.
4. If 1st t NISSAN LATIO 2011 Service Repair Manual DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-849
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Do not depress accelerator pedal even slightly.
3. Check 1st trip DTC.
4. If 1st t](/manual-img/5/57357/w960_57357-2142.png)
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-849
< SERVICE INFORMATION > [MR18DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Do not depress accelerator pedal even slightly.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to EC-849, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000006342019
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body. Refer to EC-638, "
Ground Inspection".
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK EVAP CONTROL SYS TEM 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.
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.
: Vehicle front
1. Body ground E24 2. Engine ground F93. engine ground F16
4. Body ground E15
BBIA0698E
Water should not exist.
BBIA0693E
ECM terminal Sensor terminalReference Wiring Diagram
74 Refrigerant pressure sensor terminal 3 EC-1029, "
Wiring Diagram"
75Crankshaft position sensor (POS) terminal 1 EC-794, "Wiring Diagram"
76EVAP control system pressure sensor terminal 3 EC-853, "Wiring Diagram"
102APP sensor terminal 5 EC-972, "Wiring Diagram"
Revision: May 2010 2011 Versa
Page 2144 of 3787
![NISSAN LATIO 2011 Service Repair Manual EC-850
< SERVICE INFORMATION >[MR18DE]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
• Refrigerant pressure sensor (Refer to MTC-38, "Magnet Clutch Circuit (If Equipped)".)
• Crankshaft position NISSAN LATIO 2011 Service Repair Manual EC-850
< SERVICE INFORMATION >[MR18DE]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
• Refrigerant pressure sensor (Refer to MTC-38, "Magnet Clutch Circuit (If Equipped)".)
• Crankshaft position](/manual-img/5/57357/w960_57357-2143.png)
EC-850
< SERVICE INFORMATION >[MR18DE]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
• Refrigerant pressure sensor (Refer to MTC-38, "Magnet Clutch Circuit (If Equipped)".)
• Crankshaft position sensor (POS) (Refer to EC-798, "
Component Inspection".)
OK or NG
OK >> GO TO 5.
NG >> Replace malfunctioning components.
5.CHECK APP SENSOR
Refer to EC-969, "
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-580, "
Accelerator Pedal Released Position Learning".
3. Perform EC-580, "
Throttle Valve Closed Position Learning".
4. Perform EC-580, "
Idle Air Volume Learning".
>> INSPECTION END
7.CHECK EVAP CONTROL SY STEM PRESSURE SENSOR
Refer to EC-850, "
Component Inspection".
OK or NG
OK >> GO TO 8.
NG >> Replace EVAP control system pressure sensor.
8.CHECK INTERMITTENT INCIDENT
Refer to EC-632
.
For wiring diagram, refer to EC-853, "
Wiring Diagram".
>> INSPECTION END
Component InspectionINFOID:0000000006342020
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.
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 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 2.5 V lower than above value
PBIB3314E
Revision: May 2010 2011 Versa