Infiniti Q45. Manual — part 451
DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-443
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DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
PFP:25085
Component Description
NBS001XO
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
NBS001XP
Specification data are reference values.
On Board Diagnosis Logic
NBS001XQ
NOTE:
If DTC P0453 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
P0453
0453
EVAP control system pressure
sensor high input
An excessively high voltage from the
sensor is sent to ECM.
●
Harness or connectors
(The sensor circuit is open or shorted.)
●
EVAP control system pressure sensor
●
EVAP canister vent control valve
●
EVAP canister
●
Water separator
●
Rubber hose from EVAP canister vent
control valve to water separator
EC-444
DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
DTC Confirmation Procedure
NBS001XR
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.
Wait at least 10 seconds.
7.
If 1st trip DTC is detected, go to
EC-446, "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.
Wait at least 10 seconds.
5.
Select “Service $07” with GST.
If 1st trip DTC is detected, go to
EC-446, "Diagnostic Procedure"
.
SEF194Y
PBIB1110E
DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-445
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Wiring Diagram
NBS001XS
TBWM1234E
EC-446
DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure
NBS001XT
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
32
G
EVAP control system pres-
sure sensor
[Ignition switch: ON]
Approximately 1.8 - 4.8V
48
R
Sensor power supply
(EVAP control system pres-
sure sensor)
[Ignition switch: ON]
Approximately 5V
67
B
Sensor ground
(MAF sensor, IAT sensor,
ECT sensor, FTT sensor,
EVAP control system pres-
sure sensor, PSP sensor,
ICC steering switch, ASCD
steering switch, Refrigerant
pressure sensor)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
PBIB2417E
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