Nissan Frontier. Instruction — part 663
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-1223
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
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Check air passage continuity of EVAP canister purge volume control
solenoid valve under the following conditions.
EVAP CANISTER VENT CONTROL VALVE
With CONSULT
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portionof B EVAP canister vent control valve for being
rusted.
If NG, 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.
Check 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.
9. If NG, replace EVAP canister vent control valve.
Without CONSULT
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being
rusted.
Condition
Air passage continuity
between (A) and (B)
12V direct current supply between
terminals 1 and 2
Yes
No supply
No
PBIB2059E
PBIB1033E
Condition VENT CONTROL/V
Air passage continuity
between (A) and (B)
ON
No
OFF
Yes
PBIB1033E
EC-1224
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
3. Check air passage continuity and operation delay time under the
following conditions.
Check 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.
6. If NG, replace EVAP canister vent control valve.
DRAIN FILTER
1. Check visually for insect nests in the drain filter air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Blow air into port A and check that it flows freely out of port B.
5. Block port B.
6. Blow air into port A and check that there is no leakage.
7. If NG, replace drain filter.
Condition
Air passage continuity
between (A) and (B)
12V direct current supply between
terminals 1 and 2
No
OFF
Yes
PBIB1034E
PBIB3641E
P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-1225
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
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EC
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P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Description
INFOID:0000000009481863
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 through 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 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.
On Board Diagnosis Logic
INFOID:0000000009481864
DTC Confirmation Procedure
INFOID:0000000009481865
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
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 vol-
ume 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
Wheel sensor
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 so-
lenoid valve
EC-1226
< DTC/CIRCUIT DIAGNOSIS >
[VQ40DE FOR MEXICO]
P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11V 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
EC-1226, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000009481866
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
harness connector.
3. Turn ignition switch ON.
4. Check voltage between EVAP canister purge volume control
solenoid valve terminal 2 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
• 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 1. Refer to Wiring Diagram.
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
BBIA0550E
Voltage: Battery voltage
PBIB2605E
Continuity should exist.
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