Nissan Cube. Manual — part 348
EC-278
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness connector.
3.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch ON.
2.
Check the voltage between EVAP control system pressure sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> GO TO 4.
4.
CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair short to ground or short to power in harness or connectors.
5.
CHECK COMPONENTS
Check the following.
• Battery current sensor (Refer to
EC-337, "Component Inspection"
.)
• Crankshaft position sensor (POS) (Refer to
EC-244, "Component Inspection"
• Refrigerant pressure sensor (Refer to
.)
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace malfunctioning component.
6.
CHECK APP SENSOR
EC-385, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> GO TO 7.
7.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1.
Replace accelerator pedal assembly
2.
EC-385, "Special Repair Requirement"
>> INSPECTION END
Water should not exist.
EVAP control system pressure sen-
sor
Ground
Voltage
Connector
Terminal
B21
3
Ground
Approx. 5 V
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F8
74
Refrigerant pressure sensor
E49
3
75
CKP sensor (POS)
F20
1
76
EVAP control system pressure sen-
sor
B21
3
77
Battery current sensor
F53
1
E16
102
APP sensor
E110
5
P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-279
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
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8.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-279, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace EVAP control system pressure sensor.
9.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000009947392
1.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR
1.
Turn ignition switch OFF.
2.
Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Always replace O-ring with a new one.
3.
Install a vacuum pump to EVAP control system pressure sensor.
4.
Turn ignition switch ON and check output voltage between ECM harness connector 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).
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace EVAP control system pressure sensor
ECM
Condition
[Applied vacuum kPa (kg/cm
2
, psi)
Voltage
Connector
Terminal
F8
42
(EVAP control system pressure
sensor signal)
Not applied
1.8 - 4.8 V
-26.7 (-0.272, -3.87)
2.1 to 2.5 V lower than above value
EC-280
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
Description
INFOID:0000000009947393
The EVAP control system pressure sensor detects pressure in the
purge line. The sensor output voltage to the ECM increases as pres-
sure increases.
DTC Logic
INFOID:0000000009947394
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
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.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
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.
5.
Make sure that “FUEL T/TMP SE” indication is more than 0
°
C (32
°
F).
6.
Start engine and wait at least 20 seconds.
7.
Check 1st trip DTC.
With GST
1.
Start engine and warm it up to normal operating temperature.
2.
Set voltmeter probes to ECM harness connector and ground as per the following.
PBIB3370E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0452
EVAP control system
pressure sensor low input
An excessively low voltage from the sensor is
sent to ECM.
• Harness or connectors
(EVAP control system pressure sensor
circuit is open or shorted.)
[Crankshaft position sensor (POS) circuit
is shorted.)
(Accelerator pedal position sensor circuit
is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
(Battery current sensor circuit is shorted.)
• EVAP control system pressure sensor
• Crankshaft position sensor (POS)
• Accelerator pedal position sensor
• Refrigerant pressure sensor
• Battery current sensor
P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR
EC-281
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
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3.
Make sure that the voltage is less than 4.2 V.
4.
Turn ignition switch OFF and wait at least 10 seconds.
5.
Start engine and wait at least 20 seconds.
6.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009947395
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK CONNECTOR
1.
Disconnect EVAP control system pressure sensor harness connector.
2.
Check sensor harness connector for water.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness connector.
3.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-I
1.
Turn ignition switch ON.
2.
Check the voltage between EVAP control system pressure sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> GO TO 4.
4.
CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between EVAP control system pressure sensor harness connector and ECM har-
ness connector.
Is the inspection result normal?
ECM
Ground
Connector
Terminal
F8
43
(Fuel tank temperature sensor signal)
Ground
Water should not exist.
EVAP control system pressure sen-
sor
Ground
Voltage
Connector
Terminal
B21
3
Ground
Approx. 5 V
EVAP control system pressure sen-
sor
ECM
Continuity
Connector
Terminal
Connector
Terminal
B21
3
F8
76
Existed
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