Infiniti M35/M45 Y50. Manual — part 666
DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-1137
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DTC Confirmation Procedure
NBS005I1
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.
WITH CONSULT-II
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
3.
Start engine and wait at least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.
If 1st trip DTC is detected, go to
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic Procedure
NBS005I2
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten ground screws on the body.
Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
SEF194Y
1.
Body ground M70
2.
Body ground M16
PBIB2782E
EC-1138
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DTC P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
2.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER
1.
Disconnect EVAP control system pressure sensor (3) harness
connector.
–
Illustration shows the view from under the vehicle.
–
: Vehicle front
–
EVAP canister vent control valve (1)
–
EVAP canister (2)
2.
Check sensor harness connector for water.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace harness connector.
3.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
Refer to
EC-1138, "Component Inspection"
.
OK or NG
OK
>> GO TO 4.
NG
>> Replace EVAP control system pressure sensor.
4.
CHECK INTERMITTENT INCIDENT
Refer to
EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
For Wiring Diagram, refer to
.
>> INSPECTION END
Component Inspection
NBS005I3
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 vacuum below -93.3 kPa (-700 mmHg, -27.56
inHg) or pressure over 101.3 kPa (760 mmHg, 29.92 inHg).
4.
If NG, replace EVAP control system pressure sensor.
Water should not exist.
PBIB2702E
Applied vacuum kPa
(mmHg, inHg)
Voltage V
Not applied
1.8 - 4.8
-26.7 (-200, -7.87)
2.1 to 2.5V lower than above value
PBIB1173E
DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-1139
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DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
PFP:25085
Component Description
NBS005I4
The EVAP control system pressure sensor (3) detects pressure in
the purge line. The sensor output voltage to the ECM increases as
pressure increases.
●
Illustration shows the view from under the vehicle.
●
: Vehicle front
●
EVAP canister vent control valve (1)
●
EVAP canister (2)
CONSULT-II Reference Value in Data Monitor Mode
NBS005I5
Specification data are reference values.
On Board Diagnosis Logic
NBS005I6
NOTE:
If DTC P0452 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to
EC-1193, "DTC P0643 SENSOR POWER SUPPLY"
.
PBIB2702E
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
EC-1140
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DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
DTC Confirmation Procedure
NBS005I7
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-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/TMP 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
.
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
.
SEF194Y
PBIB1110E
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