Infiniti I30. Emission Control System (2003 year). Manual — part 35
7
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected.
CAUTION:
Never apply force to the air hole protector of the sensor if equipped.
SEF799W
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.
CAUTION:
쐌
Always calibrate the vacuum pump gauge when using it.
쐌
Do not apply below −20 kPa (−150 mmHg, −5.91 inHg) or over 20 kPa (150 mmHg, 5.91 inHg) of pressure.
5. Check input voltage between ECM terminal 60 and ground.
SEC908C
MTBL1159
CAUTION:
Discard and 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.
OK or NG
OK (With CONSULT-II)
䊳
GO TO 8.
OK (Without CONSULT-
II)
䊳
GO TO 9.
NG
䊳
Replace EVAP control system pressure sensor.
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DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-545
8
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
1. Turn ignition switch “OFF”.
2. Reconnect harness connectors disconnected.
3. Start engine.
4. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-II. Check that engine speed varies according
to the valve opening.
SEC142D
OK or NG
OK
䊳
GO TO 10.
NG
䊳
GO TO 9.
9
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
With CONSULT-II
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
SEF334X
Without CONSULT-II
Check air passage continuity of EVAP canister purge volume control solenoid valve under the following conditions.
SEF335X
OK or NG
OK
䊳
GO TO 10.
NG
䊳
Replace EVAP canister purge volume control solenoid valve.
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-546
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
䊳
GO TO 11.
NG
䊳
Clean the rubber tube using an air blower.
11
CHECK EVAP CANISTER VENT CONTROL VALVE-I
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being rusted.
SEF376Z
OK or NG
OK
䊳
GO TO 12.
NG
䊳
Replace EVAP canister vent control valve.
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DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-547
12
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
䊳
GO TO 14.
NG
䊳
GO TO 13.
13
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 procedure 9 again.
OK or NG
OK
䊳
GO TO 14.
NG
䊳
Replace EVAP canister vent control valve.
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-548
14
CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve attached.
2. Check if water will drain from the EVAP canister.
SEF596U
Yes or No
Yes
䊳
GO TO 15.
No
䊳
GO TO 18.
15
CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 lb).
OK or NG
OK
䊳
GO TO 17.
NG
䊳
GO TO 16.
16
DETECT MALFUNCTIONING PART
Check the following.
쐌
EVAP canister for damage
쐌
EVAP hose between EVAP canister and water separater for clogging or poor connection
䊳
Repair hose or replace EVAP canister.
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DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-549
17
CHECK WATER SEPARATOR
1. Check visually for insect nests in the water separator air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Check that A and C are not clogged by blowing air into B with A, and then C plugged.
PBIB1032E
5. In case of NG in items 2 - 4, replace the parts.
NOTE:
Do not disassemble water separator.
OK or NG
OK
䊳
GO TO 18.
NG
䊳
Clean or replace water separator.
18
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
DTC P1444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Diagnostic Procedure (Cont’d)
EC-550
SEF381Z
SEF267X
Component Description
NHEC1096
The EVAP canister vent control valve is located on the EVAP can-
ister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is ener-
gized. A plunger will then move to seal the canister vent. The abil-
ity to seal the vent is necessary for the on board diagnosis of other
evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the
evaporative emission control system is depressurized and allows
“EVAP Control System (Small Leak)” diagnosis.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC1097
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
VENT CONT/V
쐌
Ignition switch: ON
OFF
On Board Diagnosis Logic
NHEC1099
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P1446
1446
EVAP canister vent
control valve closed
EVAP canister vent control valve remains closed
under specified driving conditions.
쐌
EVAP canister vent control valve
쐌
EVAP control system pressure sensor
and the circuit
쐌
Blocked rubber tube to EVAP canister
vent control valve
쐌
Water separator
쐌
EVAP canister is saturated with water.
PBIB0164E
DTC Confirmation Procedure
NHEC1100
CAUTION:
Always drive vehicle at a safe speed.
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.
WITH CONSULT-II
NHEC1100S01
1)
Turn ignition switch “ON”.
2)
Select “DATA MONITOR” mode with CONSULT-II.
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DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Component Description
EC-551
3)
Start engine.
4)
Drive vehicle at a speed of approximately 80 km/h (50 MPH)
for a maximum of 15 minutes.
NOTE:
If a malfunction exists, NG result may be displayed quicker.
5)
If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-554.
WITH GST
NHEC1100S02
Follow the procedure “WITH CONSULT-II” above.
DTC P1446 EVAP CANISTER VENT CONTROL VALVE
DTC Confirmation Procedure (Cont’d)
EC-552
Wiring Diagram
=NHEC1101
MEC553D
SEF668XC
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DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Wiring Diagram
EC-553
Diagnostic Procedure
NHEC1102
1
CHECK RUBBER TUBE
1. Turn ignition switch “OFF”.
2. Disconnect rubber tube connected to EVAP canister vent control valve.
3. Check the rubber tube for clogging.
SEF267X
OK or NG
OK
䊳
GO TO 2.
NG
䊳
Clean rubber tube using an air blower.
2
CHECK WATER SEPARATOR
1. Check visually for insect nests in the water separator air inlet.
2. Check visually for cracks or flaws in the appearance.
3. Check visually for cracks or flaws in the hose.
4. Check that A and C are not clogged by blowing air into B with A, and then C plugged.
PBIB1032E
5. In case of NG in items 2 - 4, replace the parts.
NOTE:
Do not disassemble water separator.
OK or NG
OK
䊳
GO TO 3.
NG
䊳
Clean or replace water separator.
DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure
EC-554
3
CHECK EVAP CANISTER VENT CONTROL VALVE-I
1. Remove EVAP canister vent control valve from EVAP canister.
2. Check portion B of EVAP canister vent control valve for being rusted.
SEF376Z
OK or NG
OK
䊳
GO TO 4.
NG
䊳
Replace EVAP canister vent control valve.
4
CHECK EVAP CANISTER VENT CONTROL VALVE-II
With CONSULT-II
1. Turn ignition switch ON.
2. Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
3. 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
䊳
GO TO 6.
NG
䊳
GO TO 5.
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DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-555
5
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 the procedure 4 again.
OK or NG
OK
䊳
GO TO 6.
NG
䊳
Replace EVAP canister vent control valve.
6
CHECK IF EVAP CANISTER SATURATED WITH WATER
1. Remove EVAP canister with EVAP canister vent control valve attached.
2. Check if water will drain from the EVAP canister.
SEF596U
Yes or No
Yes
䊳
GO TO 7.
No
䊳
GO TO 9.
7
CHECK EVAP CANISTER
Weigh the EVAP canister with the EVAP canister vent control valve attached.
The weight should be less than 1.8 kg (4.0 lb).
OK or NG
OK
䊳
GO TO 9.
NG
䊳
GO TO 8.
8
DETECT MALFUNCTIONING PART
Check the following.
쐌
EVAP canister for damage
쐌
EVAP hose between EVAP canister and water separator for clogging or poor connection
䊳
Repair hose or replace EVAP canister.
9
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR HOSE
Check disconnection or improper connection of hose connected to EVAP control system pressure sensor.
OK or NG
OK
䊳
GO TO 10.
NG
䊳
Repair it.
DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-556
10
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR
1. Disconnect EVAP control system pressure sensor harness connector.
SEF268X
2. Check connectors for water.
Water should not exist.
OK or NG
OK
䊳
GO TO 11.
NG
䊳
Replace EVAP control system pressure sensor.
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DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-557
11
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1. Remove EVAP control system pressure sensor with its harness connector connected.
CAUTION:
Never apply force to the air hole protector of the sensor if equipped.
SEF799W
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.
CAUTION:
쐌
Always calibrate the vacuum pump gauge when using it.
쐌
Do not apply below −20 kPa (−150 mmHg, −5.91 inHg) or over 20 kPa (150 mmHg, 5.91 inHg) of pressure.
5. Check input voltage between ECM terminal 60 and ground.
SEC908C
MTBL1159
CAUTION:
Discard and 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.
OK or NG
OK
䊳
GO TO 12.
NG
䊳
Replace EVAP control system pressure sensor.
12
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.
䊳
INSPECTION END
DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-558
SEF381Z
SEF267X
Component Description
NHEC1103
NOTE:
If DTC P1448 is displayed with P0442, perform trouble diagno-
sis for DTC P1448 first.
The EVAP canister vent control valve is located on the EVAP can-
ister and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is ener-
gized. A plunger will then move to seal the canister vent. The abil-
ity to seal the vent is necessary for the on board diagnosis of other
evaporative emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the
evaporative emission control system is depressurized and allows
“EVAP Control System (Small Leak)” diagnosis.
CONSULT-II Reference Value in Data Monitor
Mode
NHEC1104
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
VENT CONT/V
쐌
Ignition switch: ON
OFF
On Board Diagnosis Logic
NHEC1106
DTC No.
Trouble diagnosis
name
DTC Detecting Condition
Possible Cause
P1448
1448
EVAP canister vent
control valve open
EVAP canister vent control valve remains opened
under specified driving conditions.
쐌
EVAP canister vent control valve
쐌
EVAP control system pressure sensor
and circuit
쐌
Blocked rubber tube to EVAP canister
vent control valve
쐌
Water separator
쐌
EVAP canister is saturated with water.
쐌
Vacuum cut valve
DTC Confirmation Procedure
NHEC1107
NOTE:
쐌
If DTC P1448 is displayed with P0442, perform trouble
diagnosis for DTC P1448 first.
쐌
If
“DTC
Confirmation
Procedure”
has
been
previously
conducted, always turn ignition switch “OFF” and wait at least
10 seconds before conducting the next test.
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DTC P1448 EVAP CANISTER VENT CONTROL VALVE
Component Description
EC-559
SEC760C
SEC761C
SEC762C
SEC763C
WITH CONSULT-II
NHEC1107S01
TESTING CONDITION:
쐌
Perform “DTC WORK SUPPORT” when the fuel level is
between 1/4 to 3/4 full and vehicle is placed on flat level
surface.
쐌
Always perform test at a temperature of 0 to 30°C (32 to
86°F).
쐌
Open engine hood before conducting the following proce-
dure.
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-119.
6)
Make sure that “OK” is displayed.
If “NG” is displayed, go to the following step.
NOTE:
Make sure that EVAP hoses are connected to EVAP canister
purge volume control solenoid valve properly.
7)
Stop engine and wait at least 10 seconds, then turn “ON”.
8)
Disconnect hose from water separator.
9)
Select “VENT CONTROL/V” of “ACTIVE TEST” mode with
CONSULT-II.
10) Touch “ON” and “OFF” alternately.
PBIB0153E
11) Make sure the following.
Condition
VENT CONTROL/V
Air passage continuity
between A and B
ON
No
OFF
Yes
If the result is NG, go to “Diagnostic Procedure”, EC-563.
If the result is OK, go to “Diagnostic Procedure” for DTC
P0442, EC-341.
DTC P1448 EVAP CANISTER VENT CONTROL VALVE
DTC Confirmation Procedure (Cont’d)
EC-560
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