2009 NISSAN LATIO air condition

EC-1330< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0444, P0445 EVAP CANISTER
PURGE VOLUME CONTROL SOLENOID
VALVE
DTC P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLE-
NOID VALVE
Description INFOID:0000000004501184
SYSTEM DESCRIPTION
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM though CAN communication line.
This system controls flow rate of fuel vapor from the EVAP canister. The opening of the vapor by-pass pas-
sage in the EVAP canister purge volume control sol enoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/O FF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engi ne control. The optimum value stored in the ECM is
determined by considering various engine conditions. When t he engine is operating, the flow rate of fuel vapor
from the EVAP canister is r egulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve uses a ON/
OFF duty to control the flow rate of fuel vapor from the EVAP canis-
ter. The EVAP canister purge volume control solenoid valve is
moved by ON/OFF pulses from the ECM. The longer the ON pulse,
the greater the amount of fuel vapor that will flow through the valve.
CONSULT-III Reference Value in Data Monitor Mode INFOID:0000000004501185
Specification data are reference values. Sensor Input Signal to ECM
ECM
function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
1
EVAP can-
ister purge
flow control EVAP canister purge volume
control solenoid valve
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Battery Battery voltage*1
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
(Mixture ratio feedback signal)
Fuel tank temperature sensor Fuel temperature in fuel tank
ABS actuator and electric unit (control unit) Vehicle speed*2
Combination meter PBIA9215J
MONITOR ITEM CONDITION SPECIFICATION
PURG VOL C/V • Engine: After warming up
• Shift lever: P or N (A/T, CVT), Neutral (M/T)
• Air conditioner switch: OFF
• No load Idle
(Accelerator pedal is not depressed
even slightly, after engine starting) 0%
2,000 rpm 0 - 50%

DTC P0444, P0445 EVAP CANISTER P
URGE VOLUME CONTROL SOLENOID
VALVE
EC-1335
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
With CONSULT-III
Check air passage continuity of EV AP canister purge volume control
solenoid valve under the following conditions.
Without CONSULT-III
Check air passage continuity of EV AP canister purge volume control
solenoid valve under the following conditions.
Removal and Installation INFOID:0000000004501188
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to EM-141, " Component " .Condition
(PURG VOL CONT/V value) Air passage continuity
between A and B
100% Yes
0% No PBIA9668J
Condition
Air passage continuity
between A and B
12V direct current supply between
terminals 1 and 2 Yes
No supply No PBIA9560J

EC-1340< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0447 EVAP CANISTER VENT CONTROL VALVE
OK or NG OK >> GO TO 10.
NG >> Replace EVAP canister vent control valve. 10.
CHECK INTERMITTENT INCIDENT
Refer to EC-1138 .
>> INSPECTION END
Component Inspection INFOID:0000000004500200
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 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 control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being
rusted. PBIB1033E
Condition VENT CONTROL/V Air passage continuity between A and B
ON No
OFF Yes PBIB1033E

DTC P0447 EVAP CANISTER
VENT CONTROL VALVE
EC-1341
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
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. Condition Air passage continuity between A and B
12V direct current supply between
terminals 1 and 2 No
OFF Yes PBIB1034E

DTC P0448 EVAP CANISTER
VENT CONTROL VALVE
EC-1345
< SERVICE INFOMATION >
[MR TYPE 2] C
D E
F
G H
I
J
K L
M A EC
NP
O
Diagnosis Procedure
INFOID:00000000045002061.
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-1314, " Component Inspection " .
OK or NG OK >> GO TO 3.
NG >> Replace drain filter. 3.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to EC-1340, " 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 - 14V)
32 P ECM relay
(Self shut-off) [Engine is running]
[Ignition switch: OFF]
• For a few seconds after turning ignition switch OFF 0 - 1.0V
[Ignition switch: OFF]
• More than a few seconds after turning igni-
tion switch OFF BATTERY VOLTAGE
(11 - 14V)
105 G Power supply for ECM [Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V) BBIA0693E

DTC P0448 EVAP CANISTER
VENT CONTROL VALVE
EC-1347
< SERVICE INFOMATION >
[MR TYPE 2] 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
Condition Air passage continuity between A and B
12V direct current supply between
terminals 1 and 2 No
OFF Yes PBIB1034E

EC-1350< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0451 EVAP CONTROL
SYSTEM PRESSURE SENSOR
• Refrigerant pressure sensor (Refer to MTC-37 .)
• Crankshaft position sensor (POS) (Refer to EC-1298, " Component Inspection " .)
OK or NG OK >> GO TO 5.
NG >> Replace malfunctioning components. 5.
CHECK APP SENSOR
Refer to EC-1468, " 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-1084, " Accelerator Pedal Released Position Learning " .
3. Perform EC-1084, " Throttle Valve Closed Position Learning " .
4. Perform EC-1084, " Idle Air Volume Learning " .
>> INSPECTION END 7.
CHECK EVAP CONTROL SY STEM PRESSURE SENSOR
Refer to EC-1350, " Component Inspection " .
OK or NG OK >> GO TO 8.
NG >> Replace EVAP control system pressure sensor. 8.
CHECK INTERMITTENT INCIDENT
Refer to EC-1138 .
For wiring diagram, refer to EC-1353, " Wiring Diagram " .
>> INSPECTION END
Component Inspection INFOID:0000000004500213
EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor wit h 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 2.5V lower than above value PBIB3314E

EC-1354< SERVICE INFOMATION >
[MR TYPE 2]
DTC P0452 EVAP CONTROL
SYSTEM PRESSURE SENSOR
Diagnosis Procedure INFOID:00000000045002191.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground screws on the body.
Refer to EC-1144, " Ground Inspection " .
OK or NG OK >> GO TO 2.
NG >> Repair or replace ground connections. 2.
CHECK CONNECTOR
TER-
MI-
NAL
NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
42 V EVAP control system pres-
sure sensor [Ignition switch: ON]
Approximately 1.8 - 4.8V
51 O Sensor ground
(EVAP control system pres-
sure sensor) [Engine is running]
• Warm-up condition
• Idle speed Approximately 0V
74 W Sensor power supply
(Refrigerant pressure
sensor) [Ignition switch: ON]
Approximately 5V
75 BR Sensor power supply
[Crankshaft position sensor
(POS)] [Ignition switch: ON]
Approximately 5V
76 W EVAP control system pres-
sure sensor power supply [Ignition switch: ON]
Approximately 5V
102 SB Sensor power supply
(Accelerator pedal position
sensor 2) [Ignition switch: ON]
Approximately 5V:
Vehicle front
1. Body ground E24 2. Engine ground F9 3. Engine ground F16
4. Body ground E15 BBIA0698E