Nissan Frontier D22. Manual - part 451

DTC P0441 EVAP CONTROL SYSTEM

EC-907

[VG33E]

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EC

12. 

CHECK CLOSED THROTTLE POSITION SWITCH

 With CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF.

3.

Turn ignition switch ON.

4.

Select “DATA MONITOR” mode with CONSULT-II.

5.

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

If NG, adjust closed throttle position switch.
Check the following items. Refer to 

EC-646, "Basic Inspection"

 .

6.

If it is impossible to adjust closed throttle position switch in “Basic Inspection”, replace closed throttle posi-
tion switch.

OK or NG

OK

>> GO TO 14.

NG

>> Replace throttle position switch with throttle position sensor.

Throttle valve conditions

CLSD THL/P SW

Completely closed

ON

Partially open or completely open

OFF

Items

Specifications

Ignitions timing

10 

± 5° BTDC

Base idle speed

700 

± 50 rpm (in P or N position)

Closed throttle position switch idle 
position adjustment

Feeler gauge thickness and switch 
condition
0.3 mm (0.012 in): ON
0.4 mm (0.016 in): OFF

Target idle speed

750 

± 50 rpm (in P or N position)

EC-908

[VG33E]

DTC P0441 EVAP CONTROL SYSTEM

13. 

CHECK CLOSED THROTTLE POSITION SWITCH

 Without CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Turn ignition switch OFF.

3.

Disconnect closed throttle position switch harness connector.

4.

Check continuity between closed throttle position switch termi-
nals 4 and 5.
Resistance measurement must be made with closed throttle
position switch installed in vehicle.

If NG, adjust closed throttle position switch.
Check the following items. Refer to 

EC-646, "Basic Inspection"

 .

5.

If it is impossible to adjust closed throttle position switch in “Basic Inspection”, replace closed throttle posi-
tion switch.

OK or NG

OK

>> GO TO 14.

NG

>> Replace throttle position switch with throttle position sensor.

14. 

CHECK EVAP PURGE LINE

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

EC-1165, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 15.

NG

>> Replace it.

15. 

CLEAN EVAP PURGE LINE

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

>> GO TO 16.

16. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-696, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

Throttle valve conditions

Continuity

Completely closed

Yes

Partially open or completely closed

No

Items

Specifications

Ignitions timing

10 

± 5° BTDC

Base idle speed

700 

± 50 rpm (in P or N position)

Closed throttle position switch idle 
position adjustment

Feeler gauge thickness and switch 
condition
0.3 mm (0.012 in): ON 
0.4 mm (0.016 in): OFF

Target idle speed

750 

± 50 rpm (in P or N position)

BBIA0423E

DTC P0442 EVAP CONTROL SYSTEM

EC-909

[VG33E]

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EC

DTC P0442 EVAP CONTROL SYSTEM

PFP:14950

On Board Diagnosis Logic

UBS00DKT

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

EC-1083

 .)

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.

PBIB1438E

EC-910

[VG33E]

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.

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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

UBS00DKU

NOTE:

●

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

EC-1083

.)

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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:

●

Perform “DTC WORK SUPPORT” when the fuel level is between 1/4 to 3/4 full and vehicle is placed
on flat level surface.

●

Open engine hood before conducting the following procedure.

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait at least 5 seconds.

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 prop-
erly.

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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.

●

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 sys-
tem 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 
missing 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 EVAP vapor cut

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ORVR system leaks