Infiniti Q45. Manual — part 529

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

EC-755

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EC

6.

CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect VIAS control solenoid valve harness connector.

3.

Turn ignition switch ON.

4.

Check voltage between VIAS control solenoid valveterminal 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 M135, F105

●

Harness continuity between VIAS control solenoid valve and ECM relay

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

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 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-756, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace VIAS control solenoid valve.

PBIB2421E

Voltage: Battery voltage

PBIB0173E

Continuity should exist.

EC-756

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

10.

CHECK INTERMITTENT INCIDENT

Refer to

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

>> INSPECTION END

Component Inspection

NBS0026X

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.

VACUUM TANK

1.

Disconnect vacuum hose connected to vacuum tank.

2.

Connect a vacuum pump to the port A of vacuum tank.

3.

Apply vacuum and make sure that vacuum exists at the port B.

Removal and Installation

NBS0026Y

VIAS CONTROL SOLENOID VALVE

Refer to

EM-19, "INTAKE MANIFOLD"

.

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

MEC488B

PBIB0846E

MIL AND DATA LINK CONNECTOR

EC-757

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EC

MIL AND DATA LINK CONNECTOR

PFP:24814

Wiring Diagram

NBS00281

TBWM1261E

EC-758

MIL AND DATA LINK CONNECTOR

TBWM1262E