Nissan Frontier D40. Manual - part 504

 

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Nissan Frontier D40. Manual - part 504

 

 

P0448 EVAP CANISTER VENT CONTROL VALVE

EC-707

< COMPONENT DIAGNOSIS >

[VQ40DE]

C

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E

F

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EC

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P

O

2.

Check portionof B EVAP canister vent control valve for being
rusted.
If NG, go to next step.

3.

Reconnect harness connectors disconnected.

4.

Turn ignition switch ON.

5.

Perform “VENT CONTROL/V” in “ACTIVE TEST” mode.

6.

Check air passage continuity and operation delay time.
Check new O-ring is installed properly.

Operation takes less than 1 second.

If NG, replace EVAP canister vent control valve.
If OK, go to next step.

7.

Clean the air passage (portion A to B) of EVAP canister vent control valve using an air blower.

8.

Perform step 6 again.

9.

If NG, replace EVAP canister vent control valve.

 Without CONSULT-III

1.

Remove EVAP canister vent control valve from EVAP canister.

2.

Check portion B of EVAP canister vent control valve for being
rusted.

3.

Check air passage continuity and operation delay time under the
following conditions.
Check new O-ring is installed properly.

Operation takes less than 1 second.

If NG, go to next step.

4.

Clean the air passage (portion A to B) of EVAP canister vent control valve using an air blower.

5.

Perform step 3 again.

6.

If NG, replace EVAP canister vent control valve.

PBIB1033E

Condition VENT CONTROL/V

Air passage continuity

 between (A) and (B)

ON

No

OFF

Yes

PBIB1033E

Condition

Air passage continuity

 between (A) and (B)

12V direct current supply between
 terminals 1 and 2

No

OFF

Yes

PBIB1034E

EC-708

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0448 EVAP CANISTER VENT CONTROL VALVE

DRAIN FILTER

1.

Check visually for insect nests in the drain filter air inlet.

2.

Check visually for cracks or flaws in the appearance.

3.

Check visually for cracks or flaws in the hose.

4.

Blow air into port A and check that it flows freely out of port B.

5.

Block port B.

6.

Blow air into port A and check that there is no leakage.

7.

If NG, replace drain filter.

PBIB3641E

P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

EC-709

< COMPONENT DIAGNOSIS >

[VQ40DE]

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P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

Component Description

INFOID:0000000005273678

The EVAP control system pressure sensor (2) detects pressure in
the purge line. The sensor output voltage to the ECM increases as
pressure increases.
• EVAP canister vent control valve (1)
• Drain filter (3)
• EVAP canister (4)
•

: Vehicle front

On Board Diagnosis Logic

INFOID:0000000005273679

If DTC P0451 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to

EC-758

.

DTC Confirmation Procedure

INFOID:0000000005273680

1.

If DTC Confirmation Procedure has been previously conducted, always perform the following before con-
ducting the next step.

a.

Turn ignition switch OFF and wait at least 10 seconds.

b.

Turn ignition switch ON.

c.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Start engine and wait at least 40 seconds.
NOTE:
Do not depress accelerator pedal even slightly.

3.

Check 1st trip DTC.

4.

If 1st trip DTC is detected, go to 

EC-709, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005273681

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

ALBIA0514ZZ

PBIB3370E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0451
0451

EVAP control system 
pressure sensor perfor-
mance

ECM detects a sloshing signal from the EVAP 
control system pressure sensor

• Harness or connectors
• EVAP control system pressure sensor

EC-710

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0451 EVAP CONTROL SYSTEM PRESSURE SENSOR

2.

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

EC-549, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK EVPA CONTROL SYSTEM PRESSURE SENSOR CONNECTOR FOR WATER

1.

Disconnect EVAP control system pressure sensor (2) harness
connector.

-

EVAP canister vent control valve (1)

-

Drain filter (3)

-

EVAP canister (4)

-

: Vehicle front

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

Refer to 

EC-710, "Component Inspection"

.

OK or NG

OK

>> GO TO 4.

NG

>> Replace EVAP control system pressure sensor.

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-46, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005273682

EVAP CONTROL SYSTEM PRESSURE SENSOR

1.

Remove EVAP control system pressure sensor with its harness connector connected from EVAP canister.
Do not reuse the O-ring, replace it with a new one.

2.

Install a vacuum pump to EVAP control system pressure sensor.

3.

Turn ignition switch ON and check output voltage between ECM
terminal 32 and ground under the following conditions.

CAUTION:

• Always calibrate the vacuum pump gauge when using it.

BBIA0539E

Water should not exist.

ALBIA0514ZZ

Applied vacuum kPa

(kg/cm

2

, psi)

Voltage V

Not applied

1.8 - 4.8

-26.7 (-0.272, -3.87)

2.1 to 2.5V lower than above value

PBIB1173E

 

 

 

 

 

 

 

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