Infiniti F50. Manual - part 429

DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-357

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7. 

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

SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminal 110 and EVAP control system pressure sensor terminal
2.
Refer to Wiring Diagram.

3.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 9.

NG

>> GO TO 8.

8. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors B401, B251

●

Harness connectors B211, M141

●

Harness connectors M135, F105

●

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.

9. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-357, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace EVAP control system pressure sensor.

10. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

EBS00MF3

EVAP CONTROL SYSTEM PRESSURE SENSOR

1.

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

CAUTION:

Never apply force to the air hole protector of the sensor if equipped.

2.

Remove hose from EVAP control system pressure sensor.

3.

Install a vacuum pump to EVAP control system pressure sensor.

4.

Turn ignition switch “ON”.

Continuity should exist.

EC-358

DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

5.

Use pump to apply vacuum and pressure to EVAP control sys-
tem pressure sensor as shown in figure.

CAUTION:

●

Always calibrate the vacuum pump gauge when using it.

●

Do not apply below -93.3 kPa (-700 mmHg, -27.56 inHg) or
pressure over 101.3 kPa (760 mmHg, 29.92 inHg).

6.

Check voltage between ECM terminal 110 and ground with
CONSULT-II or tester.

CAUTION:

Discard any EVAP control system pressure sensor which has dropped from a height of more than
0.5 m (19.7 in) onto a hard surface such a concrete floor; use a new one.

7.

If NG, replace EVAP control system pressure sensor.

Applied vacuum kPa

(mmHg, inHg)

Voltage V

Not applied

1.8 - 4.8

-26.7 (-200 mmHg, -7.87)

2.1 to 2.5V lower than above value

PBIB0156E

DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-359

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DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

PFP:25085

Component Description

EBS00MF4

The EVAP control system pressure sensor detects pressure in the purge line. The sensor output voltage to the
ECM increases as pressure increases.

CONSULT-II Reference Value in Data Monitor Mode

EBS00MF5

Specification data are reference values.

On Board Diagnosis Logic

EBS00MF6

PBIB0026E

PBIB1207E

MONITOR ITEM

CONDITION

SPECIFICATION

EVAP SYS PRES

●

Ignition switch: ON

Approx. 1.8 - 4.8V

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0453
0453

EVAP control system pressure 
sensor high input

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

●

Harness or connectors
(The sensor circuit is open or shorted.)

●

EVAP control system pressure sensor

●

EVAP canister vent control valve

●

EVAP canister

●

Water separator

●

Rubber hose from EVAP canister vent 
control valve to water separator

EC-360

DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

DTC Confirmation Procedure

EBS00MF7

NOTE:
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.

 WITH CONSULT-II

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-II.

5.

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

°

C (32

°

F).

6.

Start engine and wait at least 20 seconds.

7.

If 1st trip DTC is detected, go to 

EC-362, "Diagnostic Procedure"

.

 WITH GST

1.

Start engine and warm it up to normal operating temperature.

2.

Check that voltage between ECM terminal 92 (Fuel tank temper-
ature sensor signal) and ground is less than 4.2V.

3.

Turn ignition switch “OFF” and wait at least 10 seconds.

4.

Start engine and wait at least 20 seconds.

5.

Select “MODE 7” with GST.
If 1st trip DTC is detected, go to 

EC-362, "Diagnostic Procedure"

.

SEF194Y

SEF340X