Infiniti I35 (A33). Manual — part 305
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
©
GO TO 2.
NG
©
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
©
GO TO 3.
NG
©
Clean or replace water separator.
GI
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DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure
EC-561
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
©
GO TO 4.
NG
©
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
©
GO TO 6.
NG
©
GO TO 5.
DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-562
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
©
GO TO 6.
NG
©
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
©
GO TO 7.
No
©
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
©
GO TO 9.
NG
©
GO TO 8.
8
DETECT MALFUNCTIONING PART
Check the following.
I
EVAP canister for damage
I
EVAP hose between EVAP canister and water separator for clogging or poor connection
©
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
©
GO TO 10.
NG
©
Repair it.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-563
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
©
GO TO 11.
NG
©
Replace EVAP control system pressure sensor.
DTC P1446 EVAP CANISTER VENT CONTROL VALVE
Diagnostic Procedure (Cont’d)
EC-564
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