Infiniti Q45. Manual - part 451

DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-443

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DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

PFP:25085

Component Description

NBS001XO

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

NBS001XP

Specification data are reference values.

On Board Diagnosis Logic

NBS001XQ

NOTE:
If DTC P0453 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to 

EC-492, "DTC P0643 SENSOR POWER SUPPLY"

 .

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-444

DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

DTC Confirmation Procedure

NBS001XR

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 more than 5

°

C (41

°

F).

 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.

Wait at least 10 seconds.

7.

If 1st trip DTC is detected, go to 

EC-446, "Diagnostic Procedure"

.

 WITH GST

1.

Start engine and warm it up to normal operating temperature.

2.

Check that voltage between ECM terminal 107 (Fuel tank tem-
perature sensor signal) and ground is less than 4.2V.

3.

Turn ignition switch OFF and wait at least 10 seconds.

4.

Wait at least 10 seconds.

5.

Select “Service $07” with GST.
If 1st trip DTC is detected, go to 

EC-446, "Diagnostic Procedure"

.

SEF194Y

PBIB1110E

DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-445

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Wiring Diagram

NBS001XS

TBWM1234E

EC-446

DTC P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

NBS001XT

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten three ground screws on the body.
Refer to 

EC-154, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

32

G

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

48

R

Sensor power supply
(EVAP control system pres-
sure sensor)

[Ignition switch: ON]

Approximately 5V

67

B

Sensor ground
(MAF sensor, IAT sensor, 
ECT sensor, FTT sensor, 
EVAP control system pres-
sure sensor, PSP sensor, 
ICC steering switch, ASCD 
steering switch, Refrigerant 
pressure sensor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

PBIB2417E