Infiniti M35/M45 Y50. Manual - part 479

DTC P0441 EVAP CONTROL SYSTEM

EC-389

[VQ35DE]

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EC

4. 

CHECK EVAP PURGE LINE

1.

Turn ignition switch OFF.

2.

Check EVAP purge line for improper connection or disconnection.
Refer to 

EC-40, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Repair it.

5. 

CHECK EVAP PURGE HOSE AND PURGE PORT

1.

Disconnect purge hoses connected to EVAP service port A  and
EVAP canister purge volume control solenoid valve B .

2.

Blow air into each hose and EVAP purge port C .

3.

Check that air flows freely.

OK or NG

OK (With CONSULT-II)>>GO TO 6.
OK (Without CONSULT-II)>>GO TO 7.
NG

>> Repair or clean hoses and/or purge port.

6. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

 With CONSULT-II

1.

Start engine.

2.

Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with
CONSULT-II. Check that engine speed varies according to the
valve opening.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE

Refer to 

EC-413, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Replace EVAP canister purge volume control solenoid valve.

SEF367U

SEF368U

PBIB1678E

EC-390

[VQ35DE]

DTC P0441 EVAP CONTROL SYSTEM

8. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1.

Disconnect EVAP control system pressure sensor harness connector.

2.

Check connectors for water.

OK or NG

OK

>> GO TO 9.

NG

>> Replace EVAP control system pressure sensor.

9. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR FUNCTION

Refer to 

EC-432, "DTC Confirmation Procedure"

  for DTC P0452, 

EC-438, "DTC Confirmation Procedure"

  for

DTC P0453.

OK or NG

OK

>> GO TO 10.

NG

>> Replace EVAP control system pressure sensor.

10. 

CHECK RUBBER TUBE FOR CLOGGING

1.

Disconnect rubber tube connected to EVAP canister vent control valve.

2.

Check the rubber tube for clogging.

OK or NG

OK

>> GO TO 11.

NG

>> Clean the rubber tube using an air blower.

11. 

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-420, "Component Inspection"

 .

OK or NG

OK

>> GO TO 12.

NG

>> Replace EVAP canister vent control valve.

12. 

CHECK EVAP PURGE LINE

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

EC-40, "EVAPORATIVE EMISSION LINE DRAWING"

 .

OK or NG

OK

>> GO TO 13.

NG

>> Replace it.

13. 

CLEAN EVAP PURGE LINE

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

>> GO TO 14.

14. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Water should not exist.

DTC P0442 EVAP CONTROL SYSTEM

EC-391

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DTC P0442 EVAP CONTROL SYSTEM

PFP:14950

On Board Diagnosis Logic

NBS004ZL

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 EVAP canister vent control valve is closed to shut the EVAP purge line off. The EVAP canister purge vol-
ume control solenoid valve will then be 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.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0442
0442

EVAP control system 
small leak detected 
(negative pressure)

EVAP control system has a leak, EVAP 
control system does not operate prop-
erly.

●

Incorrect fuel tank vacuum relief valve

●

Incorrect fuel filler cap used

●

Fuel filler cap remains open or fails to close.

●

Foreign matter caught in fuel filler cap.

●

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

●

Foreign matter caught in EVAP canister vent 
control valve.

●

EVAP canister or fuel tank leaks

●

EVAP purge line (pipe and rubber tube) leaks

●

EVAP purge line rubber tube bent

●

Loose or disconnected rubber tube

●

EVAP canister vent control valve and the circuit

●

EVAP canister purge volume control solenoid 
valve and the circuit

●

Fuel tank temperature sensor

●

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

●

EVAP canister is saturated with water

●

EVAP control system pressure sensor

●

Fuel level sensor and the circuit

●

Refueling EVAP vapor cut valve

●

ORVR system leaks

PBIB1026E

EC-392

[VQ35DE]

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

NBS004ZM

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:

●

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

●

Always perform test at a temperature of 0 to 30

°

C (32 to 86

°

F).

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.

4.

Make sure that the following conditions are met.
COOLAN TEMP/S: 0 - 70

°

C (32 - 158

°

F)

INT/A TEMP SE: 0 - 30

°

C (32 - 86

°

F)

5.

Select “EVAP SML LEAK P0442/P1442” of “EVAPORATIVE SYSTEM” in “DTC WORK SUPPORT” mode
with CONSULT-II.
Follow the instruction displayed.

NOTE:
If the engine speed cannot be maintained within the range displayed on the CONSULT-II screen, go to

EC-78, "Basic Inspection"

 .

PBIB2643E

PBIB0829E