Infiniti I35 (A33). Manual — part 251
13
CHECK EVAP CANISTER VENT CONTROL VALVE-II
With CONSULT-II
1. Reconnect harness connectors disconnected.
2. Turn ignition switch “ON”.
3. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
4. Check air passage continuity and operation delay time.
SEC158D
Without CONSULT-II
Check air passage continuity and operation delay time under the following conditions.
SEF378Z
Make sure new O-ring is installed properly.
OK or NG
OK
©
GO TO 15.
NG
©
GO TO 14.
14
CHECK EVAP CANISTER VENT CONTROL VALVE-III
1. Clean the air passage (Portion A to B) of EVAP canister vent control valve using an air blower.
2. Perform Test No. 13 again.
OK or NG
OK
©
GO TO 15.
NG
©
Replace EVAP canister vent control valve.
15
CHECK EVAP PURGE LINE
Inspect EVAP purge line (pipe and rubber tube). Check for evidence of leaks.
Refer to “EVAPORATIVE EMISSION LINE DRAWING”, EC-41.
OK or NG
OK
©
GO TO 16.
NG
©
Replace it.
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DTC P0441 EVAP CONTROL SYSTEM
Diagnostic Procedure (Cont’d)
EC-345
16
CLEAN EVAP PURGE LINE
Clean EVAP purge line (pipe and rubber tube) using air blower.
©
GO TO 17.
17
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-152.
©
INSPECTION END
DTC P0441 EVAP CONTROL SYSTEM
Diagnostic Procedure (Cont’d)
EC-346
On Board Diagnosis Logic
NHEC0960
NOTE:
If DTC P0442 is displayed with P1448, perform trouble diagno-
sis for DTC P1448 first. (See EC-566.)
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 con-
trol 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.
SEC936C
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 properly.
I
Incorrect fuel tank vacuum relief valve
I
Incorrect fuel filler cap used
I
Fuel filler cap remains open or fails to
close.
I
Foreign matter caught in fuel filler cap
I
Leak is in line between intake mani-
fold and EVAP canister purge volume
control solenoid valve.
I
Foreign matter caught in EVAP canis-
ter vent control valve
I
EVAP canister or fuel tank leaks
I
EVAP purge line (pipe and rubber
tube) leaks
I
EVAP purge line rubber tube bent
I
Blocked or bent rubber tube to EVAP
control system pressure sensor
I
Loose or disconnected rubber tube
I
EVAP canister vent control valve and
the circuit
I
EVAP canister purge volume control
solenoid valve and the circuit
I
Absolute pressure sensor
I
Fuel tank temperature sensor
I
O-ring of EVAP canister vent control
valve is missing or damaged.
I
Water separator
I
EVAP canister is saturated with water.
I
EVAP control system pressure sensor
I
Fuel level sensor and the circuit
I
Refueling control valve
I
ORVR system leaks
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DTC P0442 EVAP CONTROL SYSTEM
On Board Diagnosis Logic
EC-347
CAUTION:
I
Use only a genuine NISSAN fuel filler cap as a replace-
ment. If an incorrect fuel filler cap is used, the MIL may
come on.
I
If the fuel filler cap is not tightened properly, the MIL may
come on.
I
Use only a genuine NISSAN rubber tube as a replacement.
SEC760C
SEC761C
SEC762C
SEC763C
DTC Confirmation Procedure
NHEC1444
NOTE:
I
If DTC P0442 is displayed with P1448, perform trouble
diagnosis for DTC P1448 first (see EC-566).
I
If
DTC
Confirmation
Procedure
has
been
previously
conducted, always turn ignition switch OFF and wait at least 10
seconds before conducting the next test.
I
Make sure that EVAP hoses are connected to EVAP canis-
ter purge volume control solenoid valve properly.
TESTING CONDITION:
I
Perform “DTC WORK SUPPORT” when the fuel level is
between 1/4 and 3/4 full, and vehicle is placed on flat level
surface.
I
Always perform test at a temperature of 0 to 30°C (32 to
86°F).
I
Open engine hood before conducting the following proce-
dure.
WITH CONSULT-II
NHEC1444S01
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 “EVP 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 dis-
played on the CONSULT-II screen, go to “Basic Inspection”,
EC-120.
6)
Make sure that “OK” is displayed.
If “NG” is displayed, refer to “Diagnostic Procedure”, EC-349.
NOTE:
Make sure that EVAP hoses are connected to EVAP canister
purge volume control solenoid valve properly.
WITH GST
NHEC1444S02
NOTE:
Be sure to read the explanation of “Driving Pattern” on EC-81
before driving vehicle.
1)
Start engine.
2)
Drive vehicle according to “Driving Pattern”, EC-81.
DTC P0442 EVAP CONTROL SYSTEM
On Board Diagnosis Logic (Cont’d)
EC-348
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