Nissan Pathfinder (2008 year). Manual — part 263
P0420, P0430 THREE WAY CATALYST FUNCTION
EC-221
< COMPONENT DIAGNOSIS >
[VQ40DE]
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NG
>> Repair or replace.
4.
CHECK IGNITION TIMING
Check the following items. Refer to
OK or NG
OK
>> GO TO 5.
NG
>> Follow the
5.
CHECK FUEL INJECTOR
1.
Stop engine and then turn ignition switch ON.
2.
Check voltage between ECM terminals 21, 22, 23, 40, 41, 42
and ground with CONSULT-III or tester.
Refer to Wiring Diagram for FUEL INJECTOR,
Diagram - ENGINE CONTROL SYSTEM -"
OK or NG
OK
>> GO TO 6.
NG
>> Perform
.
6.
CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1.
Turn ignition switch OFF.
2.
Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pres-
sure applies again during the following procedure.
3.
Start engine.
4.
After engine stalls, crank it two or three times to release all fuel
pressure.
5.
Turn ignition switch OFF.
6.
Remove all ignition coil harness connectors to avoid the electri-
cal discharge from the ignition coils.
7.
Remove ignition coil and spark plug of the cylinder to be
checked.
8.
Crank engine for five seconds or more to remove combustion gas in the cylinder.
9.
Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm
between the edge of the spark plug and grounded metal portion
as shown in the figure.
11. Crank engine for about three seconds, and check whether spark
is generated between the spark plug and the grounded metal
portion.
CAUTION:
• Do not approach to the spark plug and the ignition coil
within 50cm. Be careful not to get an electrical shock
while checking, because the electrical discharge voltage
becomes 20kV or more.
• It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
Items
Specifications
Target idle speed
625
±
50 rpm (in P or N position)
Ignition timing
15
±
5
°
BTDC (in P or N position)
Battery voltage should exist.
PBIB1172E
Spark should be generated.
BBIA0534E
PBIB2325E
EC-222
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0420, P0430 THREE WAY CATALYST FUNCTION
NOTE:
When the gap is less than 13 mm, the spark might be generated even if the coil is malfunctioning.
OK or NG
OK
>> GO TO 10.
NG
>> GO TO 7.
7.
CHECK FUNCTION OF IGNITION COIL-II
1.
Turn ignition switch OFF.
2.
Disconnect spark plug and connect a known-good spark plug.
3.
Crank engine for about three seconds, and recheck whether spark is generated between the spark plug
and the grounded metal portion.
OK or NG
OK
>> GO TO 8.
NG
>> Check ignition coil, power transistor and their circuits. Refer to
8.
CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK
>> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to
.
NG
>> 1.
Repair or clean spark plug.
2.
GO TO 9.
9.
CHECK FUNCTION OF IGNITION COIL-III
1.
Reconnect the initial spark plugs.
2.
Crank engine for about three seconds, and recheck whether spark is generated between the spark plug
and the grounded portion.
OK or NG
OK
>> INSPECTION END
NG
>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to
10.
CHECK FUEL INJECTOR
1.
Turn ignition switch OFF.
2.
Remove fuel injector assembly.
Refer to
EM-47, "Removal and Installation"
Keep fuel hose and all fuel injectors connected to fuel tube.
3.
Reconnect all fuel injector harness connectors.
4.
Disconnect all ignition coil harness connectors.
5.
Turn ignition switch ON.
Make sure fuel does not drip from fuel injector.
OK or NG
OK (Does not drip.)>>GO TO 11.
NG (Drips.)>>Replace the fuel injector(s) from which fuel is dripping.
11.
CHECK INTERMITTENT INCIDENT
.
Spark should be generated.
SEF156I
Spark should be generated.
P0420, P0430 THREE WAY CATALYST FUNCTION
EC-223
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Trouble is fixed.>>INSPECTION END
Trouble is not fixed.>>Replace three way catalyst (manifold).
EC-224
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0441 EVAP CONTROL SYSTEM
P0441 EVAP CONTROL SYSTEM
System Description
INFOID:0000000001376195
NOTE:
If DTC P0441 is displayed with other DTC such as P2122, P2123, P2127, P2128 or P2138, first perform
trouble diagnosis for other DTC.
In this evaporative emission (EVAP) control system, purge flow occurs during non-closed throttle conditions.
Purge volume is related to air intake volume. Under normal purge conditions (non-closed throttle), the EVAP
canister purge volume control solenoid valve is open to admit purge flow. Purge flow exposes the EVAP con-
trol system pressure sensor to intake manifold vacuum.
On Board Diagnosis Logic
INFOID:0000000001376196
Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow
are adequate. If not, a malfunction is determined.
DTC Confirmation Procedure
INFOID:0000000001376197
CAUTION:
Always drive vehicle at a safe speed.
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.
PBIB3640E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0441
0441
EVAP control system in-
correct purge flow
EVAP control system does not operate proper-
ly, EVAP control system has a leak between in-
take manifold and EVAP control system
pressure sensor.
• EVAP canister purge volume control so-
lenoid valve stuck closed
• EVAP control system pressure sensor
and the circuit
• Loose, disconnected or improper con-
nection of rubber tube
• Blocked rubber tube
• Cracked EVAP canister
• EVAP canister purge volume control so-
lenoid valve circuit
• Accelerator pedal position sensor
• Blocked purge port
• EVAP canister vent control valve
• Drain filter
P0441 EVAP CONTROL SYSTEM
EC-225
< COMPONENT DIAGNOSIS >
[VQ40DE]
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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-III
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 70 seconds.
6.
Select “PURG FLOW P0441” of “EVAPORATIVE SYSTEM” in “DTC CONFIRMATION” mode with CON-
SULT-III.
7.
Touch “START”.
If “COMPLETED” is displayed, go to step 7.
8.
When the following conditions are met, “TESTING” will be displayed on the CONSULT-III screen. Maintain
the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take at least 35 seconds.)
If “TESTING” is not changed for a long time, retry from step 2.
9.
Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to
Overall Function Check
INFOID:0000000001376198
Use this procedure to check the overall monitoring function of the EVAP control system purge flow monitoring.
During this check, a 1st trip DTC might not be confirmed.
WITH GST
1.
Lift up drive wheels.
2.
Start engine (TCS switch or VDC switch OFF) and warm it up to normal operating temperature.
3.
Turn ignition switch OFF, wait at least 10 seconds.
4.
Turn ignition switch ON.
5.
Turn ignition switch OFF, wait at least 10 seconds.
6.
Start engine and wait at least 70 seconds.
7.
Set voltmeter probes to ECM terminals 32 (EVAP control system
pressure sensor signal) and ground.
8.
Check EVAP control system pressure sensor value at idle speed
and note it.
9.
Establish and maintain the following conditions for at least 1
minute.
10. 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.
11. If NG, go to
Diagnosis Procedure
INFOID:0000000001376199
1.
CHECK EVAP CANISTER
Selector lever
Suitable position
VHCL SPEED SE
32 - 120 km/h (20 - 75 MPH)
ENG SPEED
500 - 3,000 rpm
B/FUEL SCHDL
1.3 - 9.0 msec
COOLAN TEMP/S
70 - 100
°
C (158 - 212
°
F)
Air conditioner switch
ON
Headlamp switch
ON
Rear window defogger switch
ON
Engine speed
Approx. 3,000 rpm
Gear position
Any position other than P, N or R
PBIB1109E
EC-226
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0441 EVAP CONTROL SYSTEM
1.
Turn ignition switch OFF.
2.
Check EVAP canister for cracks.
OK or NG
OK (With CONSULT-III)>>GO TO 2.
OK (Without CONSULT-III)>>GO TO 3.
NG
>> Replace EVAP canister.
2.
CHECK PURGE FLOW
With CONSULT-III
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-III.
4.
Rev engine up to 2,000 rpm.
5.
Touch “Qd” and “Qu” on CONSULT-III 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-III
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.
4.
CHECK EVAP PURGE LINE
1.
Turn ignition switch OFF.
2.
Check EVAP purge line for improper connection or disconnection.
Refer to
.
OK or NG
OK
>> GO TO 5.
NG
>> Repair it.
5.
CHECK EVAP PURGE HOSE AND PURGE PORT
PURG VOL CONT/V
Vacuum
100%
Should exist.
0%
Should not exist.
Vacuum should not exist.
Vacuum should exist.
P0441 EVAP CONTROL SYSTEM
EC-227
< COMPONENT DIAGNOSIS >
[VQ40DE]
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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-III)>>GO TO 6.
OK (Without CONSULT-III)>>GO TO 7.
NG
>> 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.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-243, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> 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.
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-256, "DTC Confirmation Procedure"
EC-260, "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.
SEF367U
SEF368U
Water should not exist.
EC-228
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0441 EVAP CONTROL SYSTEM
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 DRAIN FILTER
EC-228, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace drain filter.
12.
CHECK EVAP CANISTER VENT CONTROL VALVE
EC-246, "Component Inspection"
OK or NG
OK
>> GO TO 13.
NG
>> Replace EVAP canister vent control valve.
13.
CHECK EVAP PURGE LINE
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.
Refer to
.
OK or NG
OK
>> GO TO 14.
NG
>> Replace it.
14.
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
>> GO TO 15.
15.
CHECK INTERMITTENT INCIDENT
.
>> INSPECTION END
Component Inspection
INFOID:0000000001603892
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.
PBIB3641E
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