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Infiniti M45 (Y34). Manual - part 411

DTC P0442 EVAP CONTROL SYSTEM

EC-333

DTC P0442 EVAP CONTROL SYSTEM

PFP:14950

On Board Diagnosis Logic

ABS002K5

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

EC-558

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.

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

●

Blocked or bent rubber tube to EVAP control sys-
tem pressure sensor

●

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

●

Water separator

●

EVAP canister is saturated with water

●

EVAP control system pressure sensor

●

Fuel level sensor and the circuit

●

Refueling control valve

●

ORVR system leaks

SEF323U

EC-334

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

ABS002K6

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

Turn ignition switch ON.

Turn ignition switch OFF and wait at least 10 seconds.

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

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

C (32 - 158

INT/A TEMP SE: 0 - 30

C (32 - 86

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-81, "Basic Inspection"

Make sure that “OK” is displayed.
If “NG” is displayed, refer to

EC-335, "Diagnostic Procedure"

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

PBIB2643E

PBIB0829E

SEC763C

DTC P0442 EVAP CONTROL SYSTEM

EC-335

WITH GST

NOTE:
Be sure to read the explanation of

EC-60, "Driving Pattern"

before driving vehicle.

Start engine.

Drive vehicle according to

EC-60, "Driving Pattern"

Stop vehicle.

Select “MODE 1” with GST.

–

If SRT of EVAP system is not set yet, go to the following step.

–

If SRT of EVAP system is set, the result will be OK.

Turn ignition switch OFF and wait at least 10 seconds.

Start engine.
It is not necessary to cool engine down before driving.

Drive vehicle again according to the

EC-60, "Driving Pattern"

Stop vehicle.

Select “MODE 3” with GST.

–

If P0442 is displayed on the screen, go to

EC-335, "Diagnostic Procedure"

–

If P0441 is displayed on the screen, go to

EC-329, "Diagnostic Procedure"

–

If P1442 is displayed on the screen, go to

EC-537, "Diagnostic Procedure"

–

If P0441, P0442 and P1442 are not displayed on the screen, go to the following step.

10. Select “MODE 1” with GST.

–

If SRT of EVAP system is set, the result will be OK.

–

If SRT of EVAP system is not set, go to step 6.

Diagnostic Procedure

ABS002K7

CHECK FUEL FILLER CAP DESIGN

Turn ignition switch OFF.

Check for genuine NISSAN fuel filler cap design.

OK or NG

>> GO TO 2.

>> Replace with genuine NISSAN fuel filler cap.

CHECK FUEL FILLER CAP INSTALLATION

Check that the cap is tightened properly by rotating the cap clockwise.
OK or NG

>> GO TO 3.

>> 1. Open fuel filler cap, then clean cap and fuel filler neck threads using air blower.

2. Retighten until ratcheting sound is heard.

CHECK FUEL FILLER CAP FUNCTION

Check for air releasing sound while opening the fuel filler cap.
OK or NG

>> GO TO 5.

>> GO TO 4.

SEF915U

EC-336

DTC P0442 EVAP CONTROL SYSTEM

CHECK FUEL TANK VACUUM RELIEF VALVE

Refer to

EC-695, "FUEL TANK VACUUM RELIEF VALVE (BUILT INTO FUEL FULLER CAP)"

OK or NG

>> GO TO 5.

>> Replace fuel filler cap with a genuine one.

INSTALL THE PRESSURE PUMP

To locate the EVAP leak, install EVAP service port adapter and pres-
sure pump to EVAP service port securely. For the location of EVAP
service port, refer to

EC-693, "EVAPORATIVE EMISSION LINE

DRAWING"

NOTE:
Improper installation of the EVAP service port adapter to the
EVAP service port may cause leaking.

With CONSULT-II>>GO TO 6.
Without CONSULT-II>>GO TO 7.

PBIB1114E

SEF916U

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