Nissan Pathfinder (2007 year). Instruction — part 189
DTC P0441 EVAP CONTROL SYSTEM
EC-379
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EC
2007 Pathfinder
8.
Verify that EVAP control system pressure sensor value stays 0.1V less than the value at idle speed (mea-
sured at step 6) for at least 1 second.
9.
If NG, go to
EC-379, "Diagnostic Procedure"
.
Diagnostic Procedure
UBS00K92
1.
CHECK EVAP CANISTER
1.
Turn ignition switch OFF.
2.
Check EVAP canister for cracks.
OK or NG
OK (With CONSULT-II)>>GO TO 2.
OK (Without CONSULT-II)>>GO TO 3.
NG
>> Replace EVAP canister.
2.
CHECK PURGE FLOW
With CONSULT-II
1.
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
.
2.
Start engine and let it idle.
3.
Select “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II.
4.
Rev engine up to 2,000 rpm.
5.
Touch “Qd” and “Qu” on CONSULT-II screen to adjust “PURG
VOL CONT/V” opening and check vacuum existence.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 4.
3.
CHECK PURGE FLOW
Without CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Stop engine.
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 2,000 rpm after 100 seconds passed after starting engine.
OK or NG
OK
>> GO TO 7.
NG
>> GO TO 4.
PURG VOL CONT/V
Vacuum
100%
Should exist.
0%
Should not exist.
PBIB1678E
Vacuum should not exist.
Vacuum should exist.
EC-380
DTC P0441 EVAP CONTROL SYSTEM
2007 Pathfinder
4.
CHECK EVAP PURGE LINE
1.
Turn ignition switch OFF.
2.
Check EVAP purge line for improper connection or disconnection.
Refer to
EC-33, "EVAPORATIVE EMISSION LINE DRAWING"
OK or NG
OK
>> GO TO 5.
NG
>> 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.
OK or NG
OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG
>> Repair or clean hoses and/or purge port.
6.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
1.
Start engine.
2.
Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Refer to
EC-403, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace EVAP canister purge volume control solenoid valve.
SEF367U
SEF368U
PBIB1678E
DTC P0441 EVAP CONTROL SYSTEM
EC-381
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EC
2007 Pathfinder
8.
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 9.
NG
>> Replace EVAP control system pressure sensor.
9.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION
Refer to
EC-422, "DTC Confirmation Procedure"
for DTC P0452,
EC-428, "DTC Confirmation Procedure"
for P0453.
OK or NG
OK
>> GO TO 10.
NG
>> 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.
OK or NG
OK
>> GO TO 11.
NG
>> Clean the rubber tube using an air blower.
11.
CHECK EVAP CANISTER VENT CONTROL VALVE
Refer to
EC-410, "Component Inspection"
OK or NG
OK
>> GO TO 12.
NG
>> Replace EVAP canister vent control valve.
12.
CHECK EVAP PURGE LINE
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.
Refer to
EC-33, "EVAPORATIVE EMISSION LINE DRAWING"
.
OK or NG
OK
>> GO TO 13.
NG
>> 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
Refer to
EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Water should not exist.
EC-382
DTC P0442 EVAP CONTROL SYSTEM
2007 Pathfinder
DTC P0442 EVAP CONTROL SYSTEM
PFP:14950
On Board Diagnosis Logic
UBS00K93
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.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0442
0442
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
control 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
DTC P0442 EVAP CONTROL SYSTEM
EC-383
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EC
2007 Pathfinder
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.
●
Use only a genuine NISSAN rubber tube as a replacement.
DTC Confirmation Procedure
UBS00K94
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.
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).
WITH CONSULT-II
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-II.
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 “EVP SML LEAK P0442/P1442” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-II.
Follow the instruction displayed.
NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-II screen, go to
.
PBIB2643E
PBIB0829E
EC-384
DTC P0442 EVAP CONTROL SYSTEM
2007 Pathfinder
6.
Make sure that “OK” is displayed.
If “NG” is displayed, refer to
EC-384, "Diagnostic Procedure"
NOTE:
Make sure that EVAP hoses are connected to EVAP canister
purge volume control solenoid valve properly.
WITH GST
NOTE:
Be sure to read the explanation of
before driving vehicle.
1.
Start engine.
2.
Drive vehicle according to
3.
Stop vehicle.
4.
Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.
5.
Select Service $07 with GST.
–
If P0442 is displayed on the screen, go to
EC-384, "Diagnostic Procedure"
–
If P0441 is displayed on the screen, go to
EC-379, "Diagnostic Procedure"
Diagnostic Procedure
UBS00K95
1.
CHECK FUEL FILLER CAP DESIGN
1.
Turn ignition switch OFF.
2.
Check for genuine NISSAN fuel filler cap design.
OK or NG
OK
>> GO TO 2.
NG
>> Replace with genuine NISSAN fuel filler cap.
2.
CHECK FUEL FILLER CAP INSTALLATION
Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG
OK
>> GO TO 3.
NG
>> 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.
2. Retighten until ratcheting sound is heard.
3.
CHECK FUEL FILLER CAP FUNCTION
Check for air releasing sound while opening the fuel filler cap.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
SEC763C
SEF915U
DTC P0442 EVAP CONTROL SYSTEM
EC-385
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EC
2007 Pathfinder
4.
CHECK FUEL TANK VACUUM RELIEF VALVE
Refer to
EC-35, "FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FILLER CAP)"
.
OK or NG
OK
>> GO TO 5.
NG
>> Replace fuel filler cap with a genuine one.
5.
INSTALL THE PRESSURE PUMP
To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely. For the location of EVAP
service port, refer to
EC-33, "EVAPORATIVE EMISSION LINE
NOTE:
Improper installation of the EVAP service port adapter to the EVAP service port may cause leaking.
With CONSULT-II>>GO TO 6.
Without CONSULT-II>>GO TO 7.
BBIA0550E
SEF916U
EC-386
DTC P0442 EVAP CONTROL SYSTEM
2007 Pathfinder
6.
CHECK FOR EVAP LEAK
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “EVAP SYSTEM CLOSE” of “WORK SUPPORT” mode with CONSULT-II.
3.
Touch “START” and apply pressure into the EVAP line until the
pressure indicator reaches the middle of the bar graph.
CAUTION:
●
Never use compressed air or a high pressure pump.
●
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pres-
sure in the system.
4.
Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction instruction for more details.
Refer to
EC-33, "EVAPORATIVE EMISSION LINE DRAWING"
.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
7.
CHECK FOR EVAP LEAK
Without CONSULT-II
1.
Turn ignition switch OFF.
2.
Apply 12 volts DC to EVAP canister vent control valve. The
valve will close. (Continue to apply 12 volts until the end of test.)
3.
Pressurize the EVAP line using pressure pump with 1.3 to 2.7
kPa (10 to 20 mmHg, 0.39 to 0.79 inHg), then remove pump and
EVAP service port adapter.
CAUTION:
●
Never use compressed air or a high pressure pump.
●
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pres-
sure in the system.
4.
Using EVAP leak detector, locate the EVAP leak. For the leak
detector, refer to the instruction instruction for more details. Refer
to
EC-33, "EVAPORATIVE EMISSION LINE DRAWING"
.
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace.
PEF917U
SEF200U
BBIA0551E
SEF200U
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