Infiniti Q45. Manual — part 449
DTC P0448 EVAP CANISTER VENT CONTROL VALVE
EC-435
C
D
E
F
G
H
I
J
K
L
M
A
EC
Component Inspection
NBS00232
EVAP CANISTER VENT CONTROL VALVE
With CONSULT-II
1.
Remove EVAP canister vent control valve from EVAP canister.
2.
Check portion B of EVAP canister vent control valve for being
rusted.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
3.
Reconnect harness connectors disconnected.
4.
Turn ignition switch ON.
5.
Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.
6.
Check air passage continuity and operation delay time.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
7.
Clean the air passage (Portion A to B ) of EVAP canister vent control valve using an air blower.
8.
Perform step 5 again.
Without CONSULT-II
1.
Remove EVAP canister vent control valve from EVAP canister.
2.
Check portion B of EVAP canister vent control valve for being
rusted.
3.
Check air passage continuity and operation delay time under the
following conditions.
Make sure new O-ring is installed properly.
Operation takes less than 1 second.
If NG, replace EVAP canister vent control valve.
If OK, go to next step.
4.
Clean the air passage (Portion A to B ) of EVAP canister vent control valve using an air blower.
5.
Perform step 3 again.
SEF337X
Condition VENT CONTROL/V
Air passage continuity between A and B
ON
No
OFF
Yes
PBIB1679E
SEF337X
Condition
Air passage continuity between A and B
12V direct current supply between
terminals 1 and 2
No
OFF
Yes
PBIB0154E
EC-436
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
PFP:25085
Component Description
NBS001XH
The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the
ECM increases as pressure increases.
CONSULT-II Reference Value in Data Monitor Mode
NBS001XI
Specification data are reference values.
On Board Diagnosis Logic
NBS001XJ
NOTE:
If DTC P0452 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to
EC-492, "DTC P0643 SENSOR POWER SUPPLY"
.
PBIB0026E
PBIB1207E
MONITOR ITEM
CONDITION
SPECIFICATION
EVAP SYS PRES
●
Ignition switch: ON
Approx. 1.8 - 4.8V
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0452
0452
EVAP control system pressure
sensor low input
An excessively low voltage from the
sensor is sent to ECM.
●
Harness or connectors
(The sensor circuit is open or shorted.)
●
EVAP control system pressure sensor
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-437
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC Confirmation Procedure
NBS001XK
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.
TESTING CONDITION:
Always perform test at a temperature of more than 5
°
C (41
°
F).
WITH CONSULT-II
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON.
4.
Select “DATA MONITOR” mode with CONSULT-II.
5.
Make sure that “FUEL T/TEMP SE” is more than 0
°
C (32
°
F).
6.
Start engine and wait at least 20 seconds.
If 1st trip DTC is detected, go to
EC-439, "Diagnostic Procedure"
.
WITH GST
1.
Start engine and warm it up to normal operating temperature.
2.
Check that voltage between ECM terminal 107 (Fuel tank tem-
perature sensor signal) and ground is less than 4.2V.
3.
Turn ignition switch OFF and wait at least 10 seconds.
4.
Start engine and wait at least 20 seconds.
5.
Select “Service $07” with GST.
If 1st trip DTC is detected, go to
EC-439, "Diagnostic Procedure"
.
SEF194Y
PBIB1110E
EC-438
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Wiring Diagram
NBS001XL
TBWM1234E
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