Infiniti G37 Coupe. Manual - part 532

P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-309

< COMPONENT DIAGNOSIS >

[VQ37VHR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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 15.

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.

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

EC-310

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

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 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 EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-310, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace EVAP control system pressure sensor.

15.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001734131

1.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

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

P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-311

< COMPONENT DIAGNOSIS >

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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

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

EC-312

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

Description

INFOID:0000000001910888

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:0000000001734133

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

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-III

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.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Turn ignition switch ON.

6.

Select “DATA MONITOR” mode with CONSULT-III.

PBIB3370E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0453

EVAP control system 
pressure sensor high in-
put

An excessively high voltage from the sensor is 
sent to ECM.

• Harness or connectors

(EVAP control system pressure sensor 
circuit is open or shorted.)
[CKP sensor (POS) circuit is shorted.]
(APP sensor 2 circuit is shorted.)
(Refrigerant pressure sensor circuit is 
shorted.)
(Brake booster pressure sensor circuit is 
shorted)

• EVAP control system pressure sensor
• Crankshaft position sensor (POS)
• Accelerator pedal position sensor
• Refrigerant pressure sensor
• Brake booster pressure sensor
• EVAP canister vent control valve
• EVAP canister
• Rubber hose from EVAP canister vent 

control valve to vehicle frame