Infiniti FX35 / FX45. Manual — part 551
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-965
< SERVICE INFORMATION >
[VK45DE]
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EC
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• Harness for open or short between EVAP control system pressure sensor and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-965, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace EVAP control system pressure sensor.
10.
CHECK INTERMITTENT INCIDENT
>> INSPECTION END
Component Inspection
INFOID:0000000001326808
EVAP CONTROL SYSTEM PRESSURE SENSOR
1.
Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one.
2.
Install a vacuum pump to EVAP control system pressure sensor.
3.
Turn ignition switch ON and check output voltage between ECM
terminal 32 and ground under the following conditions.
CAUTION:
• Always calibrate the vacuum pump gauge when using it.
• Do not apply below -93.3 kPa (-0.952 kg/cm
2
, -13.53 psi) or
pressure over 101.3 kPa (1.033 kg/cm
2
, 14.69 psi).
4.
If NG, replace EVAP control system pressure sensor.
Applied vacuum kPa
(kg/cm
2
, psi)
Voltage V
Not applied
1.8 - 4.8
-26.7 (-0.272, -3.87)
2.1 to 2.5V lower than above value
PBIB1173E
EC-966
< SERVICE INFORMATION >
[VK45DE]
DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
Component Description
INFOID:0000000001326809
The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the
ECM increases as pressure increases.
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000001326810
Specification data are reference values.
On Board Diagnosis Logic
INFOID:0000000001326811
NOTE:
If DTC P0453 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
.
DTC Confirmation Procedure
INFOID:0000000001326812
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 5
°
C (41
°
F) or more.
WITH CONSULT-III
PBIB1522E
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 in-
put
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
• Rubber hose from EVAP canister vent
control valve to vehicle frame
DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-967
< SERVICE INFORMATION >
[VK45DE]
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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.
Make sure that “FUEL T/TMP SE” is more than 0
°
C (32
°
F).
5.
Start engine and wait at least 20 seconds.
6.
Check 1st trip DTC.
7.
If 1st trip DTC is detected, go to
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.
6.
If 1st trip DTC is detected, go to
PBIB1110E
EC-968
< SERVICE INFORMATION >
[VK45DE]
DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR
Wiring Diagram
INFOID:0000000001326813
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.
TBWM1340E
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