Infiniti F50. Manual — part 499
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VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
EC-637
C
D
E
F
G
H
I
J
K
L
M
A
EC
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 CONSULT-II.
4.
Turn VIAS control solenoid valve “ON” and “OFF”, and check vacuum existence under the following condi-
tions.
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 harness connector.
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.
PBIB1256E
Condition
Vacuum
12V direct current supply
Should exist.
No supply
Should not exist.
PBIB1257E
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EC-638
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
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
OK or NG
OK
>> GO TO 5.
NG
>> Repair hoses or tubes.
5.
CHECK VACUUM TANK
Refer to
EC-639, "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 harness connector.
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.
SEF109L
PBIB1253E
Voltage: Battery voltage
PBIB0173E
![](/vehicles/zatt/pasieses/thed/leamer.png)
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
EC-639
C
D
E
F
G
H
I
J
K
L
M
A
EC
7.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E32, F32
●
Fuse, fusible link and relay block (J/B) connector E3
●
10A fuse
●
Harness continuity between fuse and VIAS control solenoid valve
>> Repair 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 27 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-639, "Component Inspection"
OK or NG
OK
>> GO TO 10.
NG
>> Replace VIAS control solenoid valve.
10.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
EBS00MNU
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.
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
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EC-640
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
With GST
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
EBS00MNV
VIAS CONTROL SOLENOID VALVE
Refer to
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
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