Nissan Murano Z51. Manual - part 613

EC-460

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

VARIABLE INDUCTION AIR SYSTEM

VARIABLE INDUCTION AIR SYSTEM

Description

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Power Valves 1 and 2

The power valves 1 and 2 are installed in intake manifold collector and used to control the suction passage of
the variable induction air control system. They are set in the fully closed or fully opened position by the power
valve actuators 1 and 2 operated by the vacuum stored in the vacuum tank. The vacuum to power valve actu-
ators is controlled by the VIAS control solenoid valves 1 and 2.

Component Function Check

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1.

CHECK OVERALL FUNCTION-I

 With CONSULT-III

1.

Start engine and warm it up to the normal operating temperature.

2.

Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT-III.

3.

Turn VIAS control solenoid valve 1 “ON” and “OFF”, and check that power valve actuator 1 rod moves.

 Without CONSULT-III

1.

Start engine and warm it up to the normal operating temperature.

2.

Rev engine quickly up to approximately 5,000 rpm.

3.

Check that power valve actuator 1 rod moves.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>>

EC-461, "Diagnosis Procedure"

.

2.

CHECK OVERALL FUNCTION-II

 With CONSULT-III

1.

Power valve actuator 1

2.

Power valve actuator 1 rod

3.

Power valve actuator 2

4.

Power valve actuator 2 rod

: Vehicle front

1.

Power valve actuator 1

2.

Power valve actuator 1 rod

3.

Power valve actuator 2

4.

Power valve actuator 2 rod

: Vehicle front

JMBIA1129ZZ

JMBIA1386ZZ

VARIABLE INDUCTION AIR SYSTEM

EC-461

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1.

Perform “VIAS S/V-2” in “ACTIVE TEST” mode with CONSULT-III.

2.

Turn VIAS control solenoid valve 2 “ON” and “OFF”, and check that power valve actuator 2 rod moves.

 Without CONSULT-III

1.

When revving engine up to 5,000 rpm quickly.

2.

Rev engine quickly up to approximately 5,000 rpm.

3.

Check that power valve actuator 2 rod moves.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>>

EC-461, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005536897

1.

INSPECTION START

Confirm the malfunctioning system (power valve 1 or power valve 2). Refer to 

EC-460, "Component Function

Check"

.

Which system is related to the incident?

Power valve 1>>GO TO 2.
Power valve 2>>GO TO 6.

2.

CHECK VACUUM EXISTENCE-I

 With CONSULT-III

1.

Stop engine and disconnect vacuum hose connected to power valve actuator 1.

2.

Start engine and let it idle.

3.

Perform “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT-III.

4.

Turn VIAS control solenoid valve 1 ON and OFF, and check vacuum existence under the following condi-
tions.

1.

Power valve actuator 1

2.

Power valve actuator 1 rod

3.

Power valve actuator 2

4.

Power valve actuator 2 rod

: Vehicle front

1.

Power valve actuator 1

2.

Power valve actuator 1 rod

3.

Power valve actuator 2

4.

Power valve actuator 2 rod

: Vehicle front

JMBIA1129ZZ

JMBIA1386ZZ

EC-462

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

VARIABLE INDUCTION AIR SYSTEM

 Without CONSULT-III

1.

Stop engine and disconnect vacuum hose connected to power valve actuator 1.

2.

Disconnect VIAS control solenoid valve 1 harness connector.

3.

Start engine.

4.

Rev engine quickly up to approximately 5,000 rpm.

5.

Check vacuum existence under the following conditions.

Is the inspection result normal?

YES

>> Repair or replace power valve actuator 1.

NO

>> GO TO 3.

3.

CHECK VACUUM TANK

1.

Stop engine and disconnect vacuum hose connected to intake manifold collector.

2.

Start engine and let it idle.

3.

Check vacuum existence from intake manifold collector.

Does vacuum existence from the intake manifold collector?

YES

>> GO TO 4.

NO

>> Replace intake manifold collector.

4.

CHECK VACUUM HOSE

1.

Stop engine.

2.

Check vacuum hose for crack, clogging, improper connection or
disconnection. Refer to 

EC-94, "System Diagram"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair hoses or tubes.

5.

CHECK VIAS CONTROL SOLENOID VALVE 1

Refer to 

EC-388, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace VIAS control solenoid valve 1.

6.

CHECK VACUUM EXISTENCE-II

 With CONSULT-III

1.

Stop engine and disconnect vacuum hose connected to power valve actuator 2.

2.

Start engine and let it idle.

3.

Perform “VIAS S/V-2” in “ACTIVE TEST” mode with CONSULT-III.

4.

Turn VIAS control solenoid valve 2 ON and OFF, and check vacuum existence under the following condi-
tions.

VIAS S/V-1

Vacuum

ON

Existed

OFF

Not existed

Condition

Vacuum

Idle

Existed

Rev engine quickly up to approximately 5,000 rpm

Not existed

SEF109L

VARIABLE INDUCTION AIR SYSTEM

EC-463

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

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 Without CONSULT-III

1.

Stop engine and disconnect vacuum hose connected to power valve actuator 2.

2.

Disconnect VIAS control solenoid valve 1 harness connector.

3.

Start engine.

4.

Rev engine quickly up to approximately 5,000 rpm.

5.

Check vacuum existence under the following conditions.

Is the inspection result normal?

YES

>> Repair or replace power valve actuator 2.

NO

>> GO TO 7.

7.

CHECK VACUUM HOSE

1.

Stop engine.

2.

Check vacuum hose for crack, clogging, improper connection or
disconnection. Refer to 

EC-94, "System Diagram"

.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair hoses or tubes.

8.

CHECK VIAS CONTROL SOLENOID VALVE 2

Refer to 

EC-391, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace VIAS control solenoid valve 2.

9.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

VIAS S/V 2

Vacuum

ON

Existed

OFF

Not existed

Condition

Operation

Idle

Existed

Rev engine quickly up to approximately 5,000 rpm

Not existed

SEF109L