Infiniti I30 (A33). Manual — part 313
Wiring Diagram
NHEC0344
MEC742C
SEF668XB
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1448 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (OPEN)
Wiring Diagram
EC-567
Diagnostic Procedure
NHEC0345
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 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.
SEF337X
OK or NG
OK
©
GO TO 3.
NG
©
Replace EVAP canister vent control valve.
DTC P1448 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (OPEN)
Diagnostic Procedure
EC-568
3
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.
SEF991Y
Without CONSULT-II
Check air passage continuity and operation delay time under the following conditions.
SEF339X
Make sure new O-ring is installed properly.
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
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. 3 again.
OK or NG
OK
©
GO TO 5.
NG
©
Replace EVAP canister vent control valve.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P1448 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (OPEN)
Diagnostic Procedure (Cont’d)
EC-569
5
CHECK VACUUM CUT VALVE
1. Turn ignition switch OFF.
2. Remove vacuum cut valve.
3. Check vacuum cut valve as follows:
SEF379Q
a. Plug port C and D with fingers.
b. Apply vacuum to port A and check that there is no suction from port B.
c. Apply vacuum to port B and check that there is suction from port A.
d. Blow air in port B and check that there is a resistance to flow out of port A.
e. Open port C and D.
f. Blow air in port A check that air flows freely out of port C.
g. Blow air in port B check that air flows freely out of port D.
OK or NG
OK
©
GO TO 6.
NG
©
Replace vacuum cut 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.
DTC P1448 EVAPORATIVE EMISSION (EVAP) CANISTER VENT CONTROL
VALVE (OPEN)
Diagnostic Procedure (Cont’d)
EC-570
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