Nissan Frontier D40. Instruction — part 379
P0420 THREE WAY CATALYST FUNCTION
EC-207
< COMPONENT DIAGNOSIS >
[QR25DE]
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EC
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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 22, 23, 41, 42 and
ground with CONSULT-III or tester.
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 5 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:
• Never 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.
NOTE:
When the gap is less than 13 mm, the spark might be generated even if the coil is malfunctioning.
Items
Specifications
Target idle speed
A/T: 700
±
50 rpm (in P or N position)
M/T: 625
±
50 rpm (in Neutral position)
Ignition timing
A/T: 15
±
5
°
BTDC (in P or N position)
M/T: 15
±
5
°
BTDC (in Neutral position)
Voltage: Battery voltage
MBIB0030E
Spark should be generated.
BBIA0534E
PBIB2325E
EC-208
< COMPONENT DIAGNOSIS >
[QR25DE]
P0420 THREE WAY CATALYST FUNCTION
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 3 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).
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 3 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.
10.
CHECK FUEL INJECTOR
1.
Turn ignition switch OFF.
2.
Remove fuel injector assembly. Refer to
EM-38, "Removal and Installation"
.
Keep fuel hose and all fuel injectors connected to fuel injector gallery.
3.
Reconnect all fuel injector harness connectors.
4.
Disconnect all ignition coil harness connectors.
5.
Turn ignition switch ON.
check that 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
Perform
GI-46, "Intermittent Incident"
.
Trouble is fixed>>INSPECTION END
Trouble is not fixed>>Replace three way catalyst (manifold).
Spark should be generated.
SEF156I
Spark should be generated.
P0441 EVAP CONTROL SYSTEM
EC-209
< COMPONENT DIAGNOSIS >
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P0441 EVAP CONTROL SYSTEM
System Description
INFOID:0000000005273204
NOTE:
If DTC P0441 is displayed with other DTC such as P2122, P2123 P2127, P2128, 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:0000000005273205
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:0000000005273206
CAUTION:
Always drive vehicle at a safe speed.
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:
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.
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 properly,
EVAP control system has a leak between intake man-
ifold and EVAP control system pressure sensor.
• EVAP canister purge volume control
solenoid 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
solenoid valve circuit
• Accelerator pedal position sensor
• Blocked purge port
• EVAP canister vent control valve
EC-210
< COMPONENT DIAGNOSIS >
[QR25DE]
P0441 EVAP CONTROL SYSTEM
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Start engine and let it idle for at least 70 seconds.
4.
Select “PURG FLOW P0441” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode with CON-
SULT-III.
5.
Touch “START”.
If “COMPLETED” is displayed, go to step 7.
6.
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 does not change for a long time, retry from step 2.
7.
Make sure that “OK” is displayed after touching “SELF-DIAG RESULTS”. If “NG” is displayed, refer to
Overall Function Check
INFOID:0000000005273207
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 and warm it up to normal operating temperature.
3.
Turn ignition switch OFF, wait at least 10 seconds.
4.
Start engine and wait at least 70 seconds.
5.
Set voltmeter probes to ECM terminals 32 (EVAP control system
pressure sensor signal) and ground.
6.
Check EVAP control system pressure sensor value at idle speed
and note it.
7.
Establish and maintain the following conditions for at least 1
minute.
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
Diagnosis Procedure
INFOID:0000000005273208
1.
CHECK EVAP CANISTER
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
Selector lever
Suitable position
VHCL SPEED SE
32 - 120 km/h (20 - 75 MPH)
ENG SPEED
500 - 3,800 rpm
B/FUEL SCHDL
1.0 - 10.0 msec
COOLAN TEMP/S
More than 0
°
C (32
°
F)
Air conditioner switch
ON
Headlamp switch
ON
Engine speed
Approx. 3,000 rpm
Shift lever
Any position other than P, N or R
PBIB1109E
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