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 

EC-425, "Diagnosis Procedure"

.)

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace malfunctioning component.

6.

CHECK APP SENSOR

Refer to 

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.

Perform 

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 >

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8.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-279, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace EVAP control system pressure sensor.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

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 

EC-281, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009947395

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to 

GI-43, "Circuit Inspection"

.

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