Nissan Maxima. Manual - part 466

EC-348

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

1. Start engine and warm it up to normal operating temperature.

2. Set voltmeter probes to ECM harness connector terminals under the following conditions.

3. Check that the voltage is less than 4.2 V.

4. Turn ignition switch OFF and wait at least 10 seconds.

5. Turn ignition switch ON.

6. Turn ignition switch OFF and wait at least 10 seconds.

7. Start engine and wait at least 20 seconds.

8. Check 1st trip DTC.
Is 1st trip DTC detected?

YES

>> Go to 

EC-348, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010095030

Regarding Wiring Diagram information, refer to 

EC-554, "Wiring Diagram"

.

1.

CHECK GROUND CONNECTION

1. Turn ignition switch OFF.

2. Check ground connection E9. Refer to Ground Inspection in 

GI-44, "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 that water is not inside connectors.
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 sen-

sor 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.

ECM

Connector

+

–

Terminal

Terminal

E10

95

(Fuel tank temperature sensor signal)

104

(Sensor ground)

EVAP control system pressure sensor

Ground

Voltage (V)

Connector

Terminal

B41

3

Ground

Approx. 5

PBIB0138E

P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-349

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Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors B29, E29

• Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit.

6.

CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Repair short to ground or short to power in harness or connectors.

7.

CHECK COMPONENTS

Check the following.

• Crankshaft position sensor (POS) (Refer to 

EC-299, "Component Inspection"

.)

• Refrigerant pressure sensor (Refer to 

EC-515, "Diagnosis Procedure"

.)

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace malfunctioning components.

8.

CHECK APP SENSOR

Refer to 

EC-469, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> GO TO 9.

9.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1. Replace accelerator pedal assembly. Refer to 

ACC-3, "Removal and Installation"

.

2. Refer to 

EC-469, "Special Repair Requirement"

.

>> INSPECTION END

10.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND

SHORT

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.

EVAP control system pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

B41

3

E10

91

Existed

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F13

72

Refrigerant pressure sensor

E219

1

76

CKP sensor (POS)

F30

1

E10

87

APP sensor

E40

6

91

EVAP control system pressure sensor

B41

3

EC-350

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 12.

NO

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors B10, E29

• Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.

12.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND

SHORT
1. Check the continuity between EVAP control system pressure sensor harness connector and ECM har-

ness connector.

2. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 14.

NO

>> GO TO 13.

13.

DETECT MALFUNCTIONING PART

Check the following.

• Harness connectors B10, E29

• Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit, short to ground or short to power in harness or connectors.

14.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-350, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace EVAP control system pressure sensor. Refer to 

FL-17, "Removal and Installation"

.

15.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-41, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000010095031

1.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

1. Turn ignition switch OFF.

2. Remove EVAP control system pressure sensor with its harness connector.

Always replace O-ring with a new one.

3. Install a vacuum pump to EVAP control system pressure sensor.

EVAP control system pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

B41

1

E10

96

Existed

EVAP control system pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

B41

2

E10

86

Existed

P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-351

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4. Turn ignition switch ON and check output voltage between ECM

terminals under the following conditions.

CAUTION:

• Always calibrate the vacuum pump gauge when using it.
• Never 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. Refer to 

FL-17, "Removal and Installation"

.

ECM

Applied vacu-

um kPa

(kg/cm

2

, psi)

Voltage

Con-

nector

+

–

Terminal

Terminal

E10

86

(EVAP control 

system pressure 

sensor signal)

96

(Sensor 
ground)

Not applied

1.8 - 4.8 V

-26.7 (-0.272, 

-3.87)

2.1 to 2.5 V lower 
than above value

JMBIA1871ZZ