Nissan Frontier D22. Instruction — part 300

DTC P0420 THREE WAY CATALYST FUNCTION

EC-303

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EC

8.

CHECK INJECTOR

1.

Turn ignition switch OFF.

2.

Remove injector assembly.
Keep fuel hose and all injectors connected to injector gallery.

3.

Disconnect camshaft position sensor harness connector.

4.

Turn ignition switch “ON”.
Make sure fuel does not drip from injector.

OK or NG

OK (Does not drip.)>>GO TO 9.
NG (Drips.)>>Replace the injector(s) from which fuel is dripping.

9.

CHECK INTERMITTENT INCIDENT

Perform

EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

Trouble is fixed.>>INSPECTION END.
Trouble is not fixed.>>Replace three way catalyst (manifold).

EC-304

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DTC P0441 EVAP CONTROL SYSTEM

DTC P0441 EVAP CONTROL SYSTEM

PFP:14950

System Description

UBS00D78

NOTE:
If DTC P0441 is displayed with DTC P0510, perform trouble diagnosis for “DTC P0510” first. (See

EC-

407

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. Purge flow exposes the EVAP control system pressure
sensor to intake manifold vacuum.

On Board Diagnosis Logic

UBS00D79

Under normal conditions (non-closed throttle), sensor output voltage indicates if pressure drop and purge flow
are adequate. If not, a fault is determined.

PBIB1402E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0441

EVAP control system
incorrect purge flow

EVAP control system does not operate prop-
erly, EVAP control system has a leak between
intake manifold and EVAP control system pres-
sure 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

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Blocked rubber tube

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Cracked EVAP canister

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Closed throttle position switch

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Blocked purge port

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EVAP canister vent control valve

DTC P0441 EVAP CONTROL SYSTEM

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DTC Confirmation Procedure

UBS00D7A

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 5 seconds before conducting the next test.
TESTING CONDITION:

●

For best results perform test at a temperature of 5

°C (41°F) or more.

●

Before performing the following procedure, confirm that battery voltage is more than 11V at idle.

WITH CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF and wait at least 5 seconds.

3.

Start engine and let it idle for at least 60 seconds.

4.

Select “PURG FLOW P0441” of “EVAP SYSTEM” in “DTC CONFIRMATION” mode with CONSULT-II.

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-II screen. Maintain
the conditions continuously until “TESTING” changes to “COMPLETED”. (It will take at least 30 seconds.)

If “TESTING” is not changed 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-

306, "Diagnostic Procedure"

.

Overall Function Check

UBS00D7B

Use this procedure to check the overall monitoring function of the EVAP control system purge flow monitoring.
During this check, a 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 and wait at least 5 seconds.

4.

Start engine and wait at least 60 seconds.

Selector lever

Suitable position

Vehicle speed

32 - 120 km/h (20 - 75 MPH)

ENG SPEED

500 - 3,750 rpm

Engine coolant temperature

More than 70

°C (158°F)

PBIB0826E

EC-306

[KA24DE]

DTC P0441 EVAP CONTROL SYSTEM

5.

Set voltmeter probes to ECM terminals 62 (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-306, "Diagnostic Procedure"

.

Diagnostic Procedure

UBS00D7C

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 service port and install
vacuum gauge.

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.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 4.

Air conditioner switch

ON

Head lamp switch

ON

Rear window defogger switch

ON

Engine speed

Approx. 3,000 rpm

Gear position

Any position other than N or P

LEC045A

SEF339V

PURG VOL CONT/V

Vacuum

100.0%

Should exist.

0.0%

Should not exist.

SEF801Y