Infiniti FX35, FX50 (S51). Manual - part 842

P0447 EVAP CANISTER VENT CONTROL VALVE

EC-909

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

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Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Clean the rubber tube using an air blower.

8.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-909, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace EVAP canister vent control valve.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005237379

1.

CHECK EVAP CANISTER VENT CONTROL VALVE-I

1.

Turn ignition switch OFF.

2.

Remove EVAP canister vent control valve from EVAP canister.

3.

Check portion (A) of EVAP canister vent control valve for rust.

Is it rusted?

YES

>> Replace EVAP canister vent control valve

NO

>> GO TO 2.

2.

CHECK EVAP CANISTER VENT CONTROL VALVE-II

 With CONSULT-III

1.

Reconnect harness connectors disconnected.

2.

Turn ignition switch ON.

3.

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

4.

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

Operation takes less than 1 second.

 Without CONSULT-III

1.

Disconnect EVAP canister vent control valve harness connector.

2.

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

JMBIA0168ZZ

VENT CONTROL/V Condition

Air passage continuity between (A) and (B)

ON

Not existed

OFF

Existed

JMBIA0169ZZ

EC-910

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P0447 EVAP CANISTER VENT CONTROL VALVE

Operation takes less than 1 second.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace EVAP canister vent control valve

3.

CHECK EVAP CANISTER VENT CONTROL VALVE-III

 With CONSULT-III

1.

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

2.

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

3.

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

Operation takes less than 1 second.

 Without CONSULT-III

1.

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

2.

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

Operation takes less than 1 second.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace EVAP canister vent control valve

Condition

Air passage continuity between (A) and (B)

12 V direct current supply between
 terminals 1 and 2

Not existed

OFF

Existed

VENT CONTROL/V Condition

Air passage continuity between (A) and (B)

ON

Not existed

OFF

Existed

JMBIA0169ZZ

Condition

Air passage continuity between (A) and (B)

12 V direct current supply between
 terminals 1 and 2

Not existed

OFF

Existed

P0448 EVAP CANISTER VENT CONTROL VALVE

EC-911

< DTC/CIRCUIT DIAGNOSIS >

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P0448 EVAP CANISTER VENT CONTROL VALVE

Description

INFOID:0000000005237380

The EVAP canister vent control valve is located on the EVAP canis-
ter and is used to seal the canister vent.
This solenoid valve responds to signals from the ECM. When the
ECM sends an ON signal, the coil in the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal
the vent is necessary for the on board diagnosis of other evaporative
emission control system components.
This solenoid valve is used only for diagnosis, and usually remains
opened.
When the vent is closed, under normal purge conditions, the evapo-
rative emission control system is depressurized and allows “EVAP
Control System” diagnosis.

DTC Logic

INFOID:0000000005237381

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test. 
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 5 seconds.

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Start engine and let it idle for at least 1 minute. 

4.

Repeat next procedures 3 times.

-

Increase the engine speed up to between 3,000 and 3,500 rpm and maintain that speed for 2 minutes and
50 seconds to 3 minutes.

Do not exceed 3 minutes.

-

Fully released accelerator pedal and keep engine idle for approximately 5 seconds.

5.

Repeat next procedure 20 times.

-

Quickly increase the engine speed up to between 4,000 and 4,500 rpm and maintain that speed for 25 to
30 seconds.

PBIB1263E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0448

EVAP canister vent control 
valve close

EVAP canister vent control valve remains 
closed under specified driving conditions.

• EVAP canister vent control valve
• EVAP control system pressure sensor 

and the circuit

• Blocked rubber tube to EVAP canister 

vent control valve

• EVAP canister is saturated with water

EC-912

< DTC/CIRCUIT DIAGNOSIS >

[VK50VE]

P0448 EVAP CANISTER VENT CONTROL VALVE

-

Fully released accelerator pedal and keep engine idle for at least 35 seconds.

6.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-912, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005237382

1.

CHECK RUBBER TUBE

1.

Turn ignition switch OFF.

2.

Disconnect rubber tube connected to EVAP canister vent control valve.

3.

Check the rubber tube for clogging.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Clean rubber tube using an air blower.

2.

CHECK EVAP CANISTER VENT CONTROL VALVE

Refer to 

EC-913, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Replace EVAP canister vent control valve.

3.

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.

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 4.

NO

>> GO TO 6.

4.

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 2.1 kg (4.6 lb).

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• EVAP canister for damage

JMBIA1516GB

PBIB2731E