Infiniti FX35 / FX45. Manual - part 607

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

EC-1189

< SERVICE INFORMATION >

[VK45DE]

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EC

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Wiring Diagram

INFOID:0000000001327084

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

TBWM1370E

EC-1190

< SERVICE INFORMATION >

[VK45DE]

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

Diagnosis Procedure

INFOID:0000000001327085

1.

CHECK OVERALL FUNCTION

 With CONSULT-III

1.

Start engine and warm it up to normal operating temperature.

2.

Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CONSULT-III.

3.

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

 Without CONSULT-III

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

2.

CHECK VACUUM EXISTENCE

 With CONSULT-III

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 CONSULT-III.

4.

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

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

29

GY

VIAS control solenoid valve

[Engine is running]
• Selector lever: P or N

0 - 1.0V

[Engine is running]
• Selector lever: D
• Engine speed: Below 5,000 rpm

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
• Engine speed: Above 5,000 rpm

0 - 1.0V

PBIB3249E

PBIB3249E

VIAS SOL VALVE

Vacuum

ON

Should exist.

OFF

Should not exist.

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

EC-1191

< SERVICE INFORMATION >

[VK45DE]

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OK or NG

OK

>> Repair or replace power valve actuator.

NG

>> GO TO 4.

3.

CHECK VACUUM EXISTENCE

 Without CONSULT-III

1.

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

2.

Disconnect VIAS control solenoid valve (1) harness connector.

-

Vacuum tank (2)

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.

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-684, "Vacuum Hose Drawing"

.

OK or NG

OK

>> GO TO 5.

NG

>> Repair hoses or tubes.

5.

CHECK VACUUM TANK

Refer to 

EC-1193, "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.

PBIB3236E

Condition

Vacuum

12V direct current supply

Should exist

No supply

Should not exist

PBIB0845E

SEF109L

EC-1192

< SERVICE INFORMATION >

[VK45DE]

VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)

2.

Disconnect VIAS control solenoid valve (1) harness connector.

-

Vacuum tank (2)

3.

Turn ignition switch ON.

4.

Check voltage between VIAS control solenoid valve terminal 1
and ground with CONSULT-III or tester.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E211, M41
• Harness connectors M82, F102
• IPDM E/R connector E7
• 10A fuse
• 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.

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-1193, "Component Inspection"

.

OK or NG

OK

>> GO TO 10.

NG

>> Replace VIAS control solenoid valve.

10.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-717

.

>> INSPECTION END

PBIB3236E

Voltage: Battery voltage

PBIB0173E

Continuity should exist.