Infiniti G37 Coupe. Manual - part 533

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-313

< COMPONENT DIAGNOSIS >

[VQ37VHR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

7.

Make sure that “FUEL T/TMP SE” is more than 0

°

C (32

°

F).

8.

Start engine and wait at least 20 seconds.

9.

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 follows.

3.

Make sure that the voltage is less than 4.2V.

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-313, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001734134

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in 

GI-41, "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

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.

ECM

Ground

Connector

Terminal

M107

106

(Fuel tank temperature sensor signal)

Ground

Water should not exist.

EVAP control system pressure sensor

Ground

Voltage

Connector

Terminal

B30

3

Ground

Approx. 5V

EC-314

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors M7, B1
• Harness for open between ECM and EVAP control system pressure sensor

>> Repair open circuit.

6.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT-III

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-267, "Component Inspection"

.)

• Brake booster pressure sensor (Refer to 

EC-352, "Component Inspection"

.)

• Refrigerant pressure sensor (Refer to 

HAC-85, "Diagnosis Procedure"

.)

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Replace malfunctioning component.

8.

CHECK APP SENSOR

Refer to 

EC-460, "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

2.

Go to 

EC-460, "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.

EVAP control system pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

B30

3

M107

107

Existed

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F101

45

Brake booster pressure sensor

E48

1

46

CKP sensor (POS)

F2

1

M107

103

APP sensor

E112

6

107

EVAP control system pressure sensor

B30

3

111

Refrigerant pressure sensor

E77

3

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-315

< COMPONENT DIAGNOSIS >

[VQ37VHR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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 B1, M7
• Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit or 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 B1, M7
• Harness for open or short between EVAP control system pressure sensor and ECM

>> Repair open circuit or 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.

NO

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

15.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-298, "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-316, "Component Inspection"

.

Is the inspection result normal?

EVAP control system pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

B30

1

M107

112

Existed

EVAP control system pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

B30

2

M107

102

Existed

EC-316

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

YES

>> GO TO 17.

NO

>> Replace EVAP control system pressure sensor.

17.

CHECK IF EVAP CANISTER 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).

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 2.2 kg (4.9 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-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001734135

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).

2

: EVAP canister vent control valve

PBIB2731E

ECM

Ground

Condition

[Applied vacuum kPa (kg/cm

2

, psi)]

Voltage

Connector

Terminal

M107

102

Ground

Not applied

1.8 - 4.8V

-26.7 (-0.272, -3.87)

2.1 to 2.5V lower than above value