Infiniti M35/M45 Y50. Manual - part 740

VIAS

EC-1433

[VK45DE]

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Diagnostic Procedure

NBS005PN

1. 

CHECK OVERALL FUNCTION

 With CONSULT-II

1.

Start engine and warm it up to normal operating temperature.

2.

Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CON-
SULT-II.

3.

Turn VIAS control solenoid valve ON and OFF, and make sure
that power valve actuator (1) rod moves.

 Without CONSULT-II

1.

Lift up the vehicle.

2.

Start engine and warm it up to normal operating temperature.

3.

Make sure that power valve actuator (1) rod moves when chang-
ing the gear position to N and D alternately.

OK or NG

OK

>> INSPECTION END

NG (With CONSULT-II)>>GO TO 2.
NG (Without CONSULT-II)>>GO TO 3.

PBIB0844E

PBIB2725E

PBIB2725E

EC-1434

[VK45DE]

VIAS

2. 

CHECK VACUUM EXISTENCE

 With CONSULT-II

1.

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

2.

Start engine and let it idle.

3.

Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CON-
SULT-II.

4.

Turn VIAS control solenoid valve ON and OFF, and check vac-
uum existence under the following conditions.

OK or NG

OK

>> Repair or replace power valve actuator.

NG

>> GO TO 4.

3. 

CHECK VACUUM EXISTENCE

 Without CONSULT-II

1.

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

2.

Disconnect VIAS control solenoid valve (1) harness connector.

–

: Vehicle front

3.

Start engine and let it idle.

4.

Apply 12V of direct current between VIAS control solenoid valve
terminals 1 and 2.

5.

Check vacuum existence under the following conditions.

OK or NG

OK

>> Repair or replace power valve actuator.

NG

>> GO TO 4.

VIAS SOL VALVE

Vacuum

ON

Should exist.

OFF

Should not exist.

PBIB0844E

PBIB2694E

Condition

Vacuum

12V direct current supply

Should exist.

No supply

Should not exist.

PBIB0845E

VIAS

EC-1435

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4. 

CHECK VACUUM HOSE

1.

Stop engine.

2.

Check hoses and tubes between intake manifold and power
valve actuator for crack, clogging, improper connection or dis-
connection. Refer to 

EC-814, "Vacuum Hose Drawing"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Repair hoses or tubes.

5. 

CHECK VACUUM TANK

Refer to 

EC-1436, "Component Inspection"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Replace vacuum tank.

6. 

CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect VIAS control solenoid valve (1) harness connector.

–

: Vehicle front

3.

Turn ignition switch ON.

4.

Check voltage between terminal 1 and ground with CONSULT-II
or tester.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E12, F3

●

Harness continuity between IPDM E/R and VIAS control solenoid valve

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

SEF109L

PBIB2694E

Voltage: Battery voltage

PBIB0173E

EC-1436

[VK45DE]

VIAS

8. 

CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 29 and VIAS control solenoid valve terminal 2.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 9.

NG

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

9. 

CHECK VIAS CONTROL SOLENOID VALVE

Refer to 

EC-1436, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace VIAS control solenoid valve.

10. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-857, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

NBS005PO

VIAS CONTROL SOLENOID VALVE

 With CONSULT-II

1.

Reconnect harness connectors disconnected.

2.

Turn ignition switch ON.

3.

Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode.

4.

Check air passage continuity and operation delay time under the
following conditions.

Operation takes less than 1 second.

 Without CONSULT-II

Check air passage continuity and operation delay time under the fol-
lowing conditions.

Operation takes less than 1 second.

Continuity should exist.

Condition

VIAS SOL VALVE

Air passage continuity 

between (A) and (B)

Air passage continuity 

between (A) and (C)

ON

Yes

No

OFF

No

Yes

PBIB0177E

Condition

Air passage continuity 

between (A) and (B)

Air passage continuity 

between (A) and (C)

12V direct current supply 
between terminals 1 and 2

Yes

No

No supply

No

Yes

SEF313Q