Nissan Frontier D22. Manual — part 302

DTC P0441 EVAP CONTROL SYSTEM

EC-311

[KA24DE]

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EC

14.

CHECK THROTTLE POSITION SWITCH

With CONSULT-II

1.

Install all removed parts.

2.

Start engine and warm it up to normal operation temperature.

3.

Turn ignition switch “OFF”.

4.

Turn ignition switch “ON”.

5.

Select “DATA MONITOR” mode with CONSULT-II.

6.

Check indication of “CLSD THL/P SW” under the following conditions.
Measurement must be made with throttle position switch installed in vehicle.

OK or NG

OK

>> GO TO 17.

NG

>> GO TO 16.

15.

CHECK THROTTLE POSITION SWITCH

1.

Install all removed parts.

2.

Start engine and warm it up to normal operation temperature.

3.

Turn ignition switch “OFF”.

4.

Disconnect closed throttle position switch harness connector.

5.

Check continuity between closed throttle position switch terminals 5 and 6 under the following conditions.
Resistance measurement must be made with throttle position switch installed in vehicle.

OK or NG

OK

>> GO TO 17.

NG

>> GO TO 16.

Throttle valve conditions

CLSD THL/P SW

Completely closed

ON

Partially open or completely open

OFF

LEC094A

EC-312

[KA24DE]

DTC P0441 EVAP CONTROL SYSTEM

16.

ADJUST THROTTLE POSITION SWITCH

Check the following items. Refer to

EC-74, "Basic Inspection"

.

Is it possible to adjust closed throttle position switch?

YES or NO

YES

>> GO TO 17.

NO

>> Replace throttle position switch.

17.

CHECK EVAP PURGE LINE

Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.
Refer to

EC-565, "EVAPORATIVE EMISSION LINE DRAWING"

.

OK or NG

OK

>> GO TO 18.

NG

>> Replace it.

18.

CLEAN EVAP PURGE LINE

Clean EVAP purge line (pipe and rubber tube) using air blower.

>> GO TO 19.

19.

CHECK INTERMITTENT INCIDENT

Refer to

EC-120, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

>> INSPECTION END.

Items

Specifications

Ignition timing

20

° ± 2° BTDC

Base idle speed

750

± 50 rpm

Closed throttle position switch idle
position adjustment

Feeler gauge thickness and switch condition
0.1 mm (0.004 in): ON
0.3 mm (0.012 in): OFF

Target idle speed

800

± 50 rpm

DTC P0442 EVAP CONTROL SYSTEM

EC-313

[KA24DE]

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EC

DTC P0442 EVAP CONTROL SYSTEM

PFP:14950

On Board Diagnosis Logic

UBS00D7D

NOTE:
If DTC P0442 is displayed with DTC P1448, first perform trouble diagnosis for DTC P1448. (See

EC-481

.)
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 vacuum cut valve bypass valve is opened to clear the line between the fuel tank and the EVAP canister
purge volume control solenoid valve. The EVAP canister vent control valve will then be closed to shut the
EVAP purge line off. The EVAP canister purge volume control solenoid valve is 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.

PBIB1402E

EC-314

[KA24DE]

DTC P0442 EVAP CONTROL SYSTEM

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

UBS00D7E

NOTE:

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If DTC P0442 is displayed with P1448, perform trouble diagnosis for DTC P1448 first. Refer to

EC-

481

.

●

Make sure that EVAP hoses are connected to EVAP canister purge volume control solenoid valve
properly.

●

If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and wait
at least 5 seconds before conducting the next test.

WITH CONSULT-II

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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0442

EVAP control system
small leak detected
(negative pressure)

EVAP control system has a leak,
EVAP control system does not
operate properly.

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Incorrect fuel tank vacuum relief valve

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Incorrect fuel filler cap used

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Fuel filler cap remains open or fails to close.

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Foreign matter caught in fuel filler cap.

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Leak is in line between intake manifold and EVAP
canister purge volume control solenoid valve.

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Foreign matter caught in EVAP canister vent control
valve.

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EVAP canister or fuel tank leaks

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EVAP purge line (pipe and rubber tube) leaks

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EVAP purge line rubber tube bent

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Blocked or bent rubber tube to EVAP control system
pressure sensor

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Loose or disconnected rubber tube

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EVAP canister vent control valve and the circuit

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EVAP canister purge volume control solenoid valve
and the circuit

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Fuel tank temperature sensor

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O-ring of EVAP canister vent control valve is miss-
ing or damaged

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Water separator

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EVAP canister is saturated with water

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EVAP control system pressure sensor

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Fuel level sensor and the circuit

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Refueling control valve

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ORVR system leaks