Infiniti FX35 / FX45. Manual - part 550

DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-961

< SERVICE INFORMATION >

[VK45DE]

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4.

Select “DATA MONITOR” mode with CONSULT-III.

5.

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

°

C (32

°

F).

6.

Start engine and wait at least 20 seconds.

7.

Check 1st trip DTC.

8.

If 1st trip DTC is detected, go to 

EC-963, "Diagnosis 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.

Start engine and wait at least 20 seconds.

5.

Select “Service $07” with GST.

6.

If 1st trip DTC is detected, go to 

EC-963, "Diagnosis Procedure"

.

PBIB1110E

EC-962

< SERVICE INFORMATION >

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DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

Wiring Diagram

INFOID:0000000001326806

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.

TBWM1340E

DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-963

< SERVICE INFORMATION >

[VK45DE]

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Diagnosis Procedure

INFOID:0000000001326807

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

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

EC-723, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK CONNECTOR

1.

Disconnect EVAP control system pressure sensor harness connector.

2.

Check sensor harness connector for water.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace harness connector.

3.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch ON.

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

32

OR

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

48

L

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

[Ignition switch: ON]

Approximately 5V

67

B/W

Sensor ground

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 0V

PBIB2195E

Water should not exist.

PBIB1522E

EC-964

< SERVICE INFORMATION >

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DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

2.

Check voltage between EVAP control system pressure sensor
terminal 3 and ground with CONSULT-III or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors B201, M81
• Harness connectors M82, F102
• 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.

5.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between EVAP control system pressure sensor terminal 1 and ECM terminal
67.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 6.

6.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors B201, M81
• Harness connectors M82, F102
• 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.

7.

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

SHORT

1.

Check harness continuity between ECM terminal 32 and EVAP control system pressure sensor terminal
2.
Refer to Wiring Diagram.

2.

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 B201, M81
• Harness connectors M82, F102

Voltage: Approximately 5V

PBIB0138E

Continuity should exist.

Continuity should exist.