Nissan Altima L32. Instruction — part 293
P0441 EVAP CONTROL SYSTEM
EC-293
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
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3. Disconnect vacuum hose connected to EVAP canister purge volume control solenoid valve at EVAP ser-
vice port and install vacuum gauge. For the location of EVAP service port, refer to
.
4. Start engine and let it idle.
Do not depress accelerator pedal even slightly.
5. Check vacuum gauge indication before 60 seconds passed after starting engine.
6. Revving engine up to 2,000rpm after 100 seconds passed after starting engine.
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 4.
4.
CHECK EVAP PURGE LINE
1. Turn ignition switch OFF.
2. Check EVAP purge line for improper connection or disconnection.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair it.
5.
CHECK EVAP PURGE HOSE AND PURGE PORT
1. Disconnect purge hoses connected to EVAP service port A and
EVAP canister purge volume control solenoid valve B.
2. Blow air into each hose and EVAP purge port C.
3. Check that air flows freely.
Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 6.
YES-2 >> Without CONSULT-III: GO TO 7.
NO
>> Repair or clean hoses and/or purge port.
6.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-III
1. Start engine.
2. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-III. Check that engine speed var-
ies according to the valve opening.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 7.
Vacuum should not exist.
Vacuum should exist.
SEF367U
SEF368U
EC-294
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
P0441 EVAP CONTROL SYSTEM
7.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-304, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Replace EVAP canister purge volume control solenoid valve.
8.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
2. Check connectors for water.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace EVAP control system pressure sensor.
9.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Replace EVAP control system pressure sensor.
10.
CHECK RUBBER TUBE FOR CLOGGING
1. Disconnect rubber tube connected to EVAP canister vent control valve.
2. Check the rubber tube for clogging.
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> Clean the rubber tube using an air blower.
11.
CHECK EVAP CANISTER VENT CONTROL VALVE
EC-310, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Replace EVAP canister vent control valve.
12.
CHECK EVAP PURGE LINE
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Replace it.
13.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 14.
14.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
>> INSPECTION END
Water should not exist.
P0442 EVAP CONTROL SYSTEM
EC-295
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
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P0442 EVAP CONTROL SYSTEM
DTC Logic
INFOID:0000000004349330
DTC DETECTION LOGIC
NOTE:
If DTC P0442 is displayed with DTC P0456, first perform the trouble diagnosis for DTC P0456. Refer to
This diagnosis detects leaks in the EVAP purge line using engine intake manifold vacuum.
If pressure does not increase, the ECM will check for leaks in the line between the fuel tank and EVAP canister
purge volume control solenoid valve, under the following “Vacuum test” conditions.
The EVAP canister vent control valve is closed to shut the EVAP purge line off. The EVAP canister purge vol-
ume control solenoid valve will then be opened to depressurize the EVAP purge line using intake manifold
vacuum. After this occurs, the EVAP canister purge volume control solenoid valve will be closed.
CAUTION:
• Use only a genuine NISSAN fuel filler cap as a replacement. If an incorrect fuel filler cap is used, the
MIL may come on.
• If the fuel filler cap is not tightened properly, the MIL may come on.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0442
EVAP control system
small leak detected
(negative pressure)
EVAP control system has a leak, EVAP
control system does not operate prop-
erly.
• Incorrect fuel tank vacuum relief valve
• Incorrect fuel filler cap used
• Fuel filler cap remains open or fails to close.
• Foreign matter caught in fuel filler cap.
• Leak is in line between intake manifold and EVAP
canister purge volume control solenoid valve.
• Foreign matter caught in EVAP canister vent con-
trol valve.
• EVAP canister or fuel tank leaks
• EVAP purge line (pipe and rubber tube) leaks
• EVAP purge line rubber tube bent
• Loose or disconnected rubber tube
• EVAP canister vent control valve and the circuit
• EVAP canister purge volume control solenoid
valve and the circuit
• Fuel tank temperature sensor
• O-ring of EVAP canister vent control valve is
missing or damaged
• EVAP canister is saturated with water
• EVAP control system pressure sensor
• Fuel level sensor and the circuit
• Refueling EVAP vapor cut valve
• ORVR system leaks
PBIB1026E
EC-296
< COMPONENT DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
P0442 EVAP CONTROL SYSTEM
• Use only a genuine NISSAN rubber tube as a replacement.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
• Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 and 3/4 full, and vehicle is placed
on flat level surface.
• Always perform test at a temperature of 0 to 30
°C (32 to 86°F).
NOTE:
Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve
properly.
Do you have CONSULT-III?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT-III
1. Turn ignition switch ON.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.
4. Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70
°C (32 - 158°F)
INT/A TEMP SE: 0 - 30
°C (32 - 86°F)
5. Select “EVAP SML LEAK P0442/P1442” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-III.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-III screen, go to
EC-24, "BASIC INSPECTION : Special Repair Requirement"
.
Which is displayed on CONSULT-III screen?
OK
>> INSPECTION END
NG
>> Go to
3.
PERFORM COMPONENT FUNCTION CHECK
With GST
NOTE:
Be sure to read the explanation of DRIVING PATTERN in
before driving
vehicle.
1. Start engine.
2. Drive vehicle according to DRIVING PATTERN.
3. Stop vehicle.
4. Turn ignition switch OFF, wait at least 10 seconds and then turn ON.
5. Select Service $07 with GST.
Is 1st trip DTC displayed?
YES-1 >> P0441: Go to
YES-2 >> P0442: Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000004349331
1.
CHECK FUEL FILLER CAP DESIGN
1. Turn ignition switch OFF.
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