Infiniti Q45 (FY33). Manual — part 237
SEC059C
SEF239Y
9) Select “PURG VOL C/V P1444” of “EVAPORATIVE
SYSTEM” in “DTC WORK SUPPORT” mode with CON-
SULT-II.
10) Touch “START”.
If “COMPLETED” is displayed on CONSULT-II screen,
go to step 12).
11) When the following conditions are met, “TESTING” will
be displayed on the CONSULT-II screen. Maintain the
conditions continuously until “TESTING” changes to
“COMPLETED”. (It will take at least 20 seconds.)
CMPS-RPM (POS): 900 - 6,300 rpm
Vehicle speed: 36 - 120 km/h (22 - 75 MPH)
B/FUEL SCHDL: 2 - 4.8 msec
Selector lever: Suitable position
If “TESTING” is not displayed after 5 minutes, retry
from step 3).
12) Make sure that “OK” is displayed after touching “SELF-
DIAG RESULTS”. If “NG” is displayed, refer to
“TROUBLE DIAGNOSIS FOR DTC P1444”, EC-444.
13) Select “VC CUT/V BP/V P1491” of “EVAPORATIVE
SYSTEM” in “DTC WORK SUPPORT” mode with CON-
SULT-II.
14) Touch “START”.
15) When the following conditions are met, “TESTING” will
be displayed on the CONSULT-II screen. Maintain the
conditions continuously until “TESTING” changes to
“COMPLETED”. (It will take at least 30 seconds.)
CMPS-RPM (POS): 900 - 6,300 rpm
Vehicle speed: 36 - 120 km/h (22 - 75 MPH)
B/FUEL SCHDL: 0.5 - 4.5 msec
Selector lever: Suitable position
If “TESTING” is not displayed after 5 minutes, retry
from step 3).
16) Make sure that “OK” is displayed after touching “SELF-
DIAG RESULTS”. If “NG” is displayed, refer to “DIAG-
NOSTIC PROCEDURE”, EC-478.
SEF530Q
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
OVERALL FUNCTION CHECK
1) Remove vacuum cut valve and vacuum cut valve
bypass valve as an assembly.
2) Apply vacuum to port
q
A
and check that there is no
suction from port
q
B
.
3) Apply vacuum to port
q
B
and check that there is suction
from port
q
A
.
4) Blow air in port
q
B
and check that there is a resistance
to flow out of port
q
A
.
5) Supply battery voltage to the terminal.
6) Blow air in port
q
A
and check that air flows freely out of
port
q
B
.
7) Blow air in port
q
B
and check that air flows freely out of
port
q
A
.
8) If NG, go to “DIAGNOSTIC PROCEDURE”, EC-478.
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1491
Vacuum Cut Valve Bypass Valve (Cont’d)
EC-477
SEC057C
SEF530Q
SEF623U
SEF427U
DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK COMPONENT.
1. Remove vacuum cut valve and vacuum
cut valve bypass valve as an assembly.
2. Apply vacuum to port
q
A
and check that
there is no suction from port
q
B
.
3. Apply vacuum to port
q
B
and check that
there is suction from port
q
A
.
4. Blow air in port
q
B
and check that there
is a resistance to flow out of port
q
A
.
5. Select “VC/V BYPASS/V” in
“ACTIVE TEST” mode with CON-
SULT-II and touch “ON”.
-------------------------------------------------------------------------------------------------------------------------------------- OR --------------------------------------------------------------------------------------------------------------------------------------
5. Supply battery voltage to the ter-
minal.
6. Blow air in port
q
A
and check that air
flows freely out of port
q
B
.
7. Blow air in port
q
B
and check that air
flows freely out of port
q
A
.
NG
E
OK
Check the following.
I
EVAP purge line between
EVAP canister and fuel
tank for clogging or dis-
connection.
I
EVAP canister Refer to
EC-26.
I
EVAP purge port of fuel
tank for clogging
If NG, repair or replace.
OK
Go to
below.
Check bypass hoses for clogging.
OK
E
NG
Repair or replace hoses.
CHECK COMPONENT
(Vacuum cut valve, vacuum cut valve
bypass valve).
Refer to “COMPONENT INSPECTION” on
next page.
OK
E
NG
Replace malfunctioning
parts.
CHECK COMPONENT
(EVAP control system pressure sensor).
1. Check for disconnection of hose con-
nected to the sensor.
2. Check sensor harness connector for
water.
Water should not exist.
If OK, go to the following step.
3. Check EVAP control system pressure
sensor.
Refer to “COMPONENT INSPECTION” on
next page.
OK
E
NG
Repair or replace harness,
connectors and/or replace
EVAP control system pres-
sure sensor.
CHECK COMPONENT
(EVAP canister vent control valve).
Refer to “COMPONENT INSPECTION”,
EC-480.
OK
E
NG
Repair or replace.
Perform “TROUBLE DIAGNOSIS FOR
INTERMITTENT INCIDENT”, EC-117.
INSPECTION END
TROUBLE DIAGNOSIS FOR DTC P1491
Vacuum Cut Valve Bypass Valve (Cont’d)
H
H
H
H
H
H
H
H
EC-478
SEC057C
SEF351Q
COMPONENT INSPECTION
Vacuum cut valve bypass valve
Check air passage continuity.
Perform “VC/V BYPASS/V” in “ACTIVE TEST” mode.
Condition
VC/V BYPASS/V
Air passage continuity
between
q
A
and
q
B
ON
Yes
OFF
No
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Condition
Air passage continuity
between
q
A
and
q
B
12V direct current supply between terminals
Yes
No supply
No
If NG or operation takes more than 1 second, replace vacuum cut
valve bypass valve.
SEF379Q
Vacuum cut valve
Check vacuum cut valve as follows:
1.
Plug port
q
C
and
q
D
with fingers.
2.
Apply vacuum to port
q
A
and check that there is no suction
from port
q
B
.
3.
Apply vacuum to port
q
B
and check that there is suction from
port
q
A
.
4.
Blow air in port
q
B
and check that there is a resistance to flow
out of port
q
A
.
5.
Open port
q
C
and
q
D
.
6.
Blow air in port
q
A
check that air flows freely out of port
q
C
.
7.
Blow air in port
q
B
check that air flows freely out of port
q
D
.
SEF357W
SEF799W
EVAP control system pressure sensor
1.
Remove EVAP control system pressure sensor with its har-
ness connector connected.
2.
Remove hose from EVAP control system pressure sensor.
3.
Turn ignition switch “ON”.
4.
Use pump to apply vacuum and pressure to EVAP control
system pressure sensor as shown in figure.
5.
Check output voltage between ECM terminal
q
92
and ground.
Pressure (Relative to atmospheric pressure)
Voltage (V)
0 kPa (0 mmHg, 0 inHg)
3.0 - 3.6
−9.3 kPa (−70 mmHg, −2.76 inHg)
0.4 - 0.6
CAUTION:
I
Always calibrate the vacuum pump gauge when using it.
I
Do not apply below −20 kPa (−150 mmHg, −5.91 inHg) or
over 20 kPa (150 mmHg, 5.91 inHg) of pressure.
6.
If NG, replace EVAP control system pressure sensor.
I
Never apply force to the air hole protector of the sensor,
if equipped.
I
Discard any EVAP control system pressure sensor which
has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new
one.
GI
MA
EM
LC
FE
AT
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1491
Vacuum Cut Valve Bypass Valve (Cont’d)
EC-479
SEC050C
AEC783A
EVAP canister vent control valve
Check air passage continuity.
Perform “VENT CONTROL/V” in “ACTIVE TEST” mode with
CONSULT-II.
Condition
VENT CONTROL/V
Air passage continuity
between
q
A
and
q
B
ON
No
OFF
Yes
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Condition
Air passage continuity
between
q
A
and
q
B
12V direct current supply between ter-
minals
q
1
and
q
2
No
No supply
Yes
If NG or operation takes more than 1 second, clean valve using air
blower or replace as necessary.
If the portion
q
B
is rusted, replace EVAP canister vent control
valve.
Make sure new O-ring is installed properly.
TROUBLE DIAGNOSIS FOR DTC P1491
Vacuum Cut Valve Bypass Valve (Cont’d)
EC-480
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст