Infiniti M45 (Y34). Manual - part 417

DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-357

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Wiring Diagram

ABS002KS

TBWA0292E

EC-358

DTC P0452 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

ABS002KT

1. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten two ground screws. 
Refer to 

EC-141, "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.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

89

B

Sensor ground

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

103

L

Sensor power supply

[Ignition switch: ON]

Approximately 5V

110

G

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

PBIB1118E

Water should not exist.

PBIB0026E

DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-359

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3. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch ON.

2.

Check voltage between EVAP control system pressure sensor
terminal 1 and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

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.

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 3 and ECM terminal
89.
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 B401, B251

●

Harness connectors B211, M141

●

Harness connectors M135, F105

●

Joint connector-30

●

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.

Voltage: Approximately 5V

PBIB0155E

Continuity should exist.

EC-360

DTC P0452 EVAP CONTROL SYSTEM PRESSURE SENSOR

7. 

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

SHORT

1.

Check harness continuity between ECM terminal 110 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 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 SHIELD CIRCUIT FOR OPEN AND SHORT

1.

Disconnect harness connectors B401, B251.

2.

Check the following continuity between harness connector B251 terminal 5 and ground.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 10.

10. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors B401, B251

●

Harness connectors B211, M141

●

Harness connectors M135, F105

●

Joint connector-28

●

Joint connector-29

●

Harness for open or short between harness connector B251 terminal 5 and ground

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

11. 

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-361, "Component Inspection"

 .

OK or NG

OK

>> GO TO 12.

NG

>> Replace EVAP control system pressure sensor.

Continuity should exist.

Continuity should exist.