Infiniti FX35, FX50 (S51). Manual - part 846

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-925

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3.

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

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors B201, M117
• Harness connectors M116, F103
• Harness for open between ECM and EVAP control system pressure sensor

>> 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.
• Battery current sensor (Refer to 

EC-1025, "Component Inspection"

.)

• Camshaft position sensor (bank 1) (Refer to 

EC-881, "Component Inspection"

.)

• Crankshaft position sensor (Refer to 

EC-876, "Component Inspection"

.)

• Exhaust valve timing control position sensor (bank 1) (Refer to 

EC-978, "Component Inspection"

.)

• Manifold absolute pressure sensor (Refer to 

EC-785, "Component Inspection"

.)

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace malfunctioning component.

8.

CHECK APP SENSOR

Refer to 

EC-1081, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 20.

NO

>> GO TO 9.

9.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly

EVAP control system pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

B252

3

M160

107

Existed

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F111

87

Crankshaft position sensor

F2

1

91

Camshaft position sensor (bank 1)

F84

1

EVT control position sensor (bank 1)

F59

1

95

Battery current sensor

E21

1

EVAP control system pressure sensor

B252

3

Manifold absolute pressure sensor

F65

3

M160

99

APP sensor 2 (Without ICC)

E112

6

APP sensor 2 (With ICC)

E116

3

EC-926

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P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

2.

Perform 

EC-1082, "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.

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 B201, M117
• Harness connectors M116, F103
• 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 B201, M117
• Harness connectors M116, F103
• 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 RUBBER TUBE

1.

Disconnect rubber tube connected to EVAP canister vent control valve.

2.

Check the rubber tube for clogging.

Is the inspection result normal?

YES

>> GO TO 15.

EVAP control system 

pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

B252

1

F111

70

Existed

EVAP control system 

pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

B252

2

F111

80

Existed

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-927

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>> Clean the rubber tube using an air blower, repair or replace rubber tube.

15.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-909, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Replace EVAP canister vent control valve.

16.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-927, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 17.

NO

>> Replace EVAP control system pressure sensor.

17.

CHECK IF EVAP CANISTER IS SATURATED WITH WATER

1.

Remove EVAP canister with EVAP canister vent control valve and EVAP control system pressure sensor
attached.

2.

Check if water will drain from the EVAP canister (1).

-

EVAP canister vent control valve (2)

Does water drain from EVAP canister?

YES

>> GO TO 18.

NO

>> GO TO 20.

18.

CHECK EVAP CANISTER

Weigh the EVAP canister with the EVAP canister vent control valve and EVAP control system pressure sensor
attached.
The weight should be less than 2.1 kg (4.6 lb).
Is the inspection result normal?

YES

>> GO TO 20.

NO

>> GO TO 19.

19.

DETECT MALFUNCTIONING PART

Check the following.
• EVAP canister for damage
• EVAP hose between EVAP canister and vehicle frame for clogging or poor connection

>> Repair hose or replace EVAP canister.

20.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005237395

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.

4.

Turn ignition switch ON and check output voltage between ECM harness connector terminals under the
following conditions.

PBIB2731E

EC-928

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P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

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.

ECM

Condition

[Applied vacuum kPa (kg/cm

2

, psi)]

Voltage (V)

Connector

+

–

Terminal

Terminal

F111

80

70

Not applied

1.8 - 4.8

-26.7 (-0.272, -3.87)

2.1 to 2.5 lower than above value