Nissan Frontier D40. Manual - part 379

P0420 THREE WAY CATALYST FUNCTION

EC-207

< COMPONENT DIAGNOSIS >

[QR25DE]

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EC

N

P

O

OK or NG

OK

>> GO TO 5.

NG

>> Follow the 

EC-19, "Basic Inspection"

.

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 

EC-375, "Diagnosis Procedure"

.

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 

EC-382

.

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 >

[QR25DE]

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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 

EC-

210, "Diagnosis Procedure"

.

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 

EC-210, "Diagnosis Procedure"

.

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