Nissan Pathfinder (2012 year). Instruction — part 336
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-769
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Description
INFOID:0000000007358634
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 via the 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 solenoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is
determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor
from the EVAP canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve is used to
control the flow rate of fuel vapor from the EVAP canister. 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.
On Board Diagnosis Logic
INFOID:0000000007358635
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed*
1
EVAP canister
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
Unified meter control unit
Vehicle speed*
2
PBIB2057E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0443
0443
EVAP canister purge
volume control solenoid
valve
The canister purge flow is detected during the
specified driving conditions, even when EVAP
canister purge volume control solenoid valve is
completely closed.
• EVAP control system pressure sensor
• EVAP canister purge volume control so-
lenoid valve
(The valve is stuck open.)
• EVAP canister vent control valve
• Drain filter
• EVAP canister
• Hoses
(Hoses are connected incorrectly or
clogged.)
August 2012
2012 Pathfinder
EC-770
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
DTC Confirmation Procedure
INFOID:0000000007358636
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Always perform test at a temperature of 5
°
C (41
°
F) or more.
WITH CONSULT
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. Turn ignition switch OFF and wait at least 10 seconds.
5. Turn ignition switch ON.
6. Select “PURG VOL CN/V P1444” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with
CONSULT.
7. Touch “START”.
8. Start engine and let it idle until “TESTING” on CONSULT changes to “COMPLETED”. (It will take approxi-
mately 10 seconds.)
If “TESTING” is not displayed after 5 minutes, retry from step 2.
9. Check that “OK” is displayed after touching “SELF-DIAG RESULTS”.
If “NG” is displayed, go to
.
WITH GST
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. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and let it idle for at least 20 seconds.
6. Select Service $07 with GST.
7. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000007358637
1.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve
(1) harness connector.
-
EVAP service port (2)
-
: Vehicle front
3. Turn ignition switch ON.
ALBIA0349ZZ
August 2012
2012 Pathfinder
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-771
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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4. Check voltage between EVAP canister purge volume control
solenoid valve terminal 1 and ground with CONSULT or tester.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E2, F32
• IPDM E/R harness connector E119
• Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
• Harness for open or short between EVAP canister purge volume control solenoid valve and ECM
>> Repair harness or connectors.
3.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 45 and EVAP canister purge volume control solenoid
valve terminal 2. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
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 5.
NG
>> Replace EVAP control system pressure sensor. Refer to
FL-16, "Removal and Installation"
.
5.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-788, "Component Inspection"
OK or NG
OK (With CONSULT)>>GO TO 6.
OK (Without CONSULT)>>GO TO 7.
NG
>> Replace EVAP control system pressure sensor. Refer to
FL-16, "Removal and Installation"
.
6.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Start engine.
4. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT.
5. Check that engine speed varies according to the valve opening.
Voltage: Battery voltage
PBIB2245E
Continuity should exist.
Water should not exist.
August 2012
2012 Pathfinder
EC-772
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-773, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace EVAP canister purge volume control solenoid valve. Refer to
.
8.
CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
OK or NG
OK
>> GO TO 9.
NG
>> Clean the rubber tube using an air blower.
9.
CHECK DRAIN FILTER
EC-761, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace drain filter. Refer to
.
10.
CHECK EVAP CANISTER VENT CONTROL VALVE
EC-779, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> Replace EVAP canister vent control valve. Refer to
FL-16, "Removal and Installation"
.
11.
CHECK IF EVAP CANISTER IS SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached. Refer to
FL-16, "Removal and Installation"
2. Check if water will drain from the EVAP canister.
Yes or No
Yes
>> GO TO 12.
No
>> GO TO 14.
12.
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 14.
NG
>> GO TO 13.
13.
DETECT MALFUNCTIONING PART
Check the following.
• EVAP canister for damage
• EVAP hose between EVAP canister and drain filter for clogging or poor connection
BBIA0558E
August 2012
2012 Pathfinder
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-773
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
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>> Repair hose or replace EVAP canister. Refer to
FL-16, "Removal and Installation"
14.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
.
>>
INSPECTION END
Component Inspection
INFOID:0000000007358638
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.
Without CONSULT
Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.
Condition
(PURG VOL C/V value)
Air passage continuity
between A and B
100%
Yes
0%
No
PBIB2058E
Condition
Air passage continuity
between A and B
12V direct current supply between
terminals 1 and 2
Yes
No supply
No
PBIB2059E
August 2012
2012 Pathfinder
EC-774
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
Description
INFOID:0000000007358639
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 via the 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 solenoid valve changes to control the flow rate. The EVAP
canister purge volume control solenoid valve repeats ON/OFF operation according to the signal sent from the
ECM. The opening of the valve varies for optimum engine control. The optimum value stored in the ECM is
determined by considering various engine conditions. When the engine is operating, the flow rate of fuel vapor
from the EVAP canister is regulated as the air flow changes.
COMPONENT DESCRIPTION
The EVAP canister purge volume control solenoid valve is used to
control the flow rate of fuel vapor from the EVAP canister. 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.
On Board Diagnosis Logic
INFOID:0000000007358640
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed*
1
EVAP canister
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
Unified meter control unit
Vehicle speed*
2
PBIB2057E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0444
0444
EVAP canister purge volume
control solenoid valve circuit
open
An excessively low voltage signal is sent to
ECM through the valve
• Harness or connectors
(The solenoid valve circuit is open or
shorted.)
• EVAP canister purge volume control
solenoid valve
P0445
0445
EVAP canister purge volume
control solenoid valve circuit
shorted
An excessively high voltage signal is sent to
ECM through the valve
• Harness or connectors
(The solenoid valve circuit is shorted.)
• EVAP canister purge volume control
solenoid valve
August 2012
2012 Pathfinder
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-775
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
DTC Confirmation Procedure
INFOID:0000000007358641
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.
1. Start engine and let it idle for at least 13 seconds.
2. Check 1st trip DTC.
3. If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000007358642
1.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect EVAP canister purge volume control solenoid valve
(1) harness connector.
-
EVAP service port (2)
-
: Vehicle front
3. Turn ignition switch ON.
4. Check voltage between EVAP canister purge volume control
solenoid valve terminal 1 and ground with CONSULT or tester.
OK or NG
OK
>> GO TO 3.
NG
>> GO TO 2.
2.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E2, F32
• IPDM E/R harness connector E119
• Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
• Harness for open or short between EVAP canister purge volume control solenoid valve and ECM
>> Repair harness or connectors.
3.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 45 and EVAP canister purge volume control solenoid
valve terminal 2. Refer to Wiring Diagram.
ALBIA0349ZZ
Voltage: Battery voltage
PBIB2245E
Continuity should exist.
August 2012
2012 Pathfinder
EC-776
< DTC/CIRCUIT DIAGNOSIS >
[VK56DE]
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
4. Also check harness for short to ground and short to power.
OK or NG
OK (With CONSULT)>>GO TO 4.
OK (Without CONSULT)>>GO TO 5.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT
1. Reconnect all harness connectors disconnected.
2. Start engine.
3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT. Check that engine speed varies
according to the valve opening.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
5.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-776, "Component Inspection"
OK or NG
OK
>> GO TO 6.
NG
>> Replace EVAP canister purge volume control solenoid valve. Refer to
.
6.
CHECK INTERMITTENT INCIDENT
GI-37, "Intermittent Incident"
>>
INSPECTION END
Component Inspection
INFOID:0000000007358643
EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT
Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.
Without CONSULT
Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.
Condition
(PURG VOL C/V value)
Air passage continuity
between A and B
100%
Yes
0%
No
PBIB2058E
Condition
Air passage continuity
between A and B
12V direct current supply between
terminals 1 and 2
Yes
No supply
No
PBIB2059E
August 2012
2012 Pathfinder
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