Infiniti QX56 (Z62). Manual - part 591

EC-342

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

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

>> Proceed to 

EC-342, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000006288323

1.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR CONNECTOR

1.

Disconnect EVAP control system pressure sensor harness connector.

2.

Check that water is not inside connectors.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace harness connector.

2.

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 9.

NO

>> GO TO 3.

3.

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.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open between ECM and EVAP control system pressure sensor
• Loose or poor connection for each connector and harness

>> Repair open circuit.

5.

CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

EVAP control system pressure sensor

Ground

Voltage (V)

Connector

Terminal

C17

3

Ground

Approx. 5

EVAP control system pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

C17

3

E80

133

Existed

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

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Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair short to ground or short to power in harness or connectors. 

6.

CHECK COMPONENTS

Check the following.
• Crankshaft position sensor (Refer to 

EC-301, "Component Inspection (Crankshaft Position Sensor)"

.)

• Camshaft position sensor (bank 1) (Refer to 

EC-306, "Component Inspection (Camshaft Position Sensor)"

.)

• Battery current sensor (Refer to 

EC-427, "Component Inspection (Battery Current Sensor)"

.)

• Refrigerant pressure sensor (Refer to 

EC-520, "Component Function Check"

.)

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace malfunctioning component.

7.

CHECK APP SENSOR

Refer to 

EC-470, "Component Inspection (Accelerator Pedal Position Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> GO TO 8.

8.

REPLACE ACCELERATOR PEDAL ASSEMBLY

Replace accelerator pedal assembly.
Refer to 

ACC-3, "MODELS WITHOUT DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation"

(Without distance control assist system)
Refer to 

ACC-4, "MODELS WITH DISTANCE CONTROL ASSIST SYSTEM : Removal and Installation"

 (With

distance control assist system).

>> INSPECTION END

9.

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 11.

NO

>> GO TO 10.

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F110

76

Crankshaft position sensor

F74

1

77

Camshaft position sensor (bank 1)

F84

1

E80

133

EVAP control system pressure sen-
sor

C17

3

Battery current sensor

E63

2

Refrigerant pressure sensor

E77

1

131

APP sensor 2 (Without ICC)

E110

1

APP sensor 2 (with ICC)

E67

9

EVAP control system 

pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

C17

1

E80

150

Existed

EC-344

< DTC/CIRCUIT DIAGNOSIS >

[VK56VD]

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

10.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between EVAP control system pressure sensor and ECM
• Loose or poor connection for each connector and harness

>> Repair open circuit, short to ground or short to power in harness or connectors.

11.

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 13.

NO

>> GO TO 12.

12.

DETECT MALFUNCTIONING PART

Check the following.
• Harness for open or short between EVAP control system pressure sensor and ECM
• Loose or poor connection for each connector and harness

>> Repair open circuit, short to ground or short to power in harness or connectors.

13.

CHECK RUBBER TUBE

1.

Disconnect rubber tube connected to EVAP canister vent control valve. Refer to 

FL-10, "Hydraulic Lay-

out"

.

2.

Check the rubber tube for clogging.

Is the inspection result normal?

YES

>> GO TO 14.

NO

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

14.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-327, "Component Inspection (EVAP Canister Vent Control Valve)"

.

Is the inspection result normal?

YES

>> GO TO 15.

NO

>> Replace EVAP canister vent control valve. Refer to 

FL-10, "Exploded View"

. 

15.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-335, "Component Inspection (EVAP Control System Pressure Sensor)"

.

Is the inspection result normal?

YES

>> GO TO 16.

NO

>> Replace EVAP control system pressure sensor. Refer to 

FL-10, "Exploded View"

.

16.

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.

EVAP control system 

pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

C17

2

E80

143

Existed

P0453 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-345

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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 17.

NO

>> GO TO 19.

17.

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 2.5 kg (5.5 lb).

Is the inspection result normal?

YES

>> GO TO 19.

NO

>> GO TO 18.

18.

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. Refer to 

FL-10, "Hydraulic Layout"

.

19.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (EVAP Control System Pressure Sensor)

INFOID:0000000006288365

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.

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.

JSBIA0692ZZ

ECM

Condition

[Applied vacuum kPa (kg/cm

2

, psi)]

Voltage (V)

Connector

+

–

Terminal

Terminal

E80

143

150

Not applied

1.8 - 4.8

-26.7 (-0.272, -3.87)

2.1 to 2.5 lower than above value