Infiniti Q45 (FY33). Manual — part 226
SEF609U
PEF422W
SEF462U
PEF295U
DIAGNOSTIC TROUBLE CODE CONFIRMATION
PROCEDURE
CAUTION:
I
Never use compressed air or high pressure pump.
Otherwise, EVAP system may be damaged.
I
Do not start the engine.
I
Do not exceed 4.12 kPa (0.042 kg/cm
2
, 0.6 psi) of pressure
in EVAP system.
NOTE:
I
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PRO-
CEDURE” has been previously conducted, always turn
ignition switch “OFF” and wait at least 5 seconds before
conducting the next test.
I
Always remove service port adapter from service port
after applying air up to 0.69 to 1.38 kPa (5.17 to 10.34
mmHg, 0.20 to 0.41 inHg).
I
During the test, clamp the EVAP hose tightly as shown at
left.
I
When clamping the hose, do not clamp other than middle
of the hose to prevent loose or damage of the hose.
I
If DTC P1448 is displayed with P1440, perform TROUBLE
DIAGNOSIS FOR DTC P1448 first. (See EC-464.)
1) Turn ignition switch “OFF”.
2) Clamp the EVAP hose as shown left.
3) Turn ignition switch “ON”.
4) Select “EVAP SML LEAK P1440” of “EVAPORATIVE
SYSTEM” in “DTC WORK SUPPORT” mode with CON-
SULT-II.
Follow the instruction displayed.
5) Make sure that “OK” is displayed.
If
“NG”
is
displayed,
refer
to
“DIAGNOSTIC
PROCEDURE”, EC-435.
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I
Be sure to read the explanation of “Driving pattern” on
EC-56 before driving vehicle.
I
It is better that the fuel level is low.
1) Start engine.
2) Drive vehicle according to “Driving pattern”, EC-56.
3) Stop vehicle.
4) Select “MODE 1” with GST.
I
If SRT of EVAP system is not set yet, go to the follow-
ing step.
I
If SRT of EVAP system is set, the result will be OK.
5) Turn ignition switch “OFF” and wait at least 5 seconds.
6) Start engine.
It is not necessary to cool engine down before driving.
7) Drive vehicle again according to the “Driving pattern”,
8) Stop vehicle.
9) Select “MODE 3” with GST.
I
If P1447 is displayed on the screen, go to “TROUBLE
DIAGNOSIS FOR DTC P1447”, EC-457.
I
If P0440 is displayed on the screen, go to “DIAGNOS-
TIC PROCEDURE”, EC-301.
I
If P1440 is displayed on the screen, go to “TROUBLE
DIAGNOSIS FOR DTC P1440”, EC-435.
I
If P0440 and P1440 are not displayed on the screen, go
to the following step.
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1440
Evaporative Emission (EVAP) Control System
(Small Leak) (Positive Pressure) (Cont’d)
EC-433
10) Select “MODE 1” with GST.
I
If SRT of EVAP system is set, the result will be OK.
I
If SRT of EVAP system is not set, go to step 6).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I
Be sure to read the explanation of “Driving pattern” on
EC-56 before driving vehicle.
I
It is better that the fuel level is low.
1) Start engine.
2) Drive vehicle according to “Driving pattern”, EC-56.
3) Stop vehicle.
4) Turn ignition switch “OFF” and wait at least 5 seconds.
5) Turn ignition switch “ON” and perform “Diagnostic Test
Mode (Self-diagnostic results)” with ECM.
6) If 1st trip DTC is detected, go to “DIAGNOSTIC
PROCEDURE”, EC-435.
TROUBLE DIAGNOSIS FOR DTC P1440
Evaporative Emission (EVAP) Control System
(Small Leak) (Positive Pressure) (Cont’d)
EC-434
SEF434Q
SEF462U
SEF463U
SEF200U
SEF598U
DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK FUEL FILLER CAP.
1. Check for genuine NISSAN fuel filler
cap design.
2. Check for air releasing sound while
opening the fuel filler cap. If the air
releasing sound is heard, go to
.
If the air releasing sound is not heard,
check the following.
Was the cap tightened properly?
If Yes, check fuel filler cap vacuum
relief valve.
Refer to “EVAPORATIVE EMISSION
SYSTEM”, EC-27.
If No, open fuel filler cap, then clean
cap and filler neck thread using air
blower. Retighten until ratcheting sound
is heard.
OK
E
NG
If genuine NISSAN fuel
filler cap is not used,
replace with genuine
NISSAN fuel filler cap.
CHECK FOR EVAP LEAK.
I
Never use compressed air or a high
pressure pump.
I
Improper installation of service port
may cause a leak.
I
Do not exceed 4.12 kPa (0.042
kg/cm
2
, 0.6 psi) of pressure in EVAP
system.
To locate the EVAP leak, do the following.
1. Install the EVAP service port adapter
and the pressure pump securely.
2. Turn ignition switch “ON”.
Select “EVAP SYSTEM
CLOSE” of “WORK SUPPORT”
mode with CONSULT-II.
3. Touch “START” and apply posi-
tive pressure to the EVAP line.
4. Using EVAP leak detector,
locate the leak. Refer to the
instruction manual for more
details about the leak detector.
Refer to “Evaporative Emission
Line Drawing”, EC-29.
-------------------------------------------------------------------------------------------------------------------------------------- OR --------------------------------------------------------------------------------------------------------------------------------------
2. Turn ignition switch “OFF”.
3. Apply 12 volts DC to EVAP
canister vent control valve. The
valve will close. (Continue to
apply 12 volts until the end of
test.)
4. Apply 12 volts DC to vacuum
cut valve bypass valve. The
valve will open. (Continue to
apply 12V until the end of test.)
5. Pressurize the EVAP line using
pressure gauge with 1.3 to 2.7
kPa (10 to 20 mmHg, 0.39 to
0.79 inHg), then remove pump
and service port adapter.
6. Locate the leak using a leak
detector. Refer to the instruction
manual for more details about
the leak detector. Refer to
“Evaporative Emission Line
Drawing”, EC-29.
OK
E
NG
Repair or replace.
q
A
(Go to next page.)
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1440
Evaporative Emission (EVAP) Control System
(Small Leak) (Positive Pressure) (Cont’d)
H
H
H
EC-435
SEF599U
SEF593U
SEF594U
SEF596U
q
A
CHECK COMPONENT
(EVAP canister purge volume control
valve).
Refer to “COMPONENT INSPECTION”,
EC-439.
OK
E
NG
Replace EVAP canister
purge volume control
valve.
CHECK COMPONENT
(EVAP canister purge control valve).
Refer to “COMPONENT INSPECTION”,
EC-493.
OK
E
NG
Replace EVAP canister
purge control valve.
CHECK COMPONENT AND CIRCUIT
(EVAP canister vent control valve, O-ring
and water separator).
Refer to “COMPONENT INSPECTION”,
EC-441 and “P0446 EVAP canister vent con-
trol valve for California”, EC-315.
OK
E
NG
Repair or replace EVAP
canister vent control valve
and O-ring or harness/
connectors.
CHECK IF EVAP CANISTER SATU-
RATED WITH WATER.
1. Remove EVAP canister with EVAP can-
ister vent control valve attached.
2. Check if water will drain from the EVAP
canister. If it will, weigh the EVAP canis-
ter with the vent control valve attached.
If the weight is:
More than 1.8 kg (4.0 lb)
→
NG
Less than 1.8 kg (4.0 lb)
→
OK
OK
E
NG
Replace EVAP canister
and check the following.
1. Check hose connections
to the EVAP canister
and water separator for
clogging and poor con-
nection.
2. Check water separator.
Refer to “COMPONENT
INSPECTION”, EC-441.
q
B
(Go to next page.)
TROUBLE DIAGNOSIS FOR DTC P1440
Evaporative Emission (EVAP) Control System
(Small Leak) (Positive Pressure) (Cont’d)
H
H
H
H
H
EC-436
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