Infiniti FX35 / FX45. Manual — part 606
SNOW MODE SWITCH
EC-1185
< SERVICE INFORMATION >
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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.
7.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body.
Refer to
OK or NG
OK
>> GO TO 8.
NG
>> Repair or replace ground connections.
8.
CHECK SNOW MODE INDICATOR LAMP GROUND CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between snow mode switch terminal 2 and ground.
Refer to Wiring Diagram.
2.
Also check harness for short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit or short to power in harness or connectors.
9.
CHECK SNOW MODE SWITCH
EC-1185, "Component Inspection"
.
OK or NG
OK
>> GO TO 10.
NG
>> Replace snow mode switch.
10.
CHECK INTERMITTENT INCIDENT
>> INSPECTION END
Component Inspection
INFOID:0000000001327081
SNOW MODE SWITCH
PBIB2195E
Continuity should exist.
EC-1186
< SERVICE INFORMATION >
[VK45DE]
SNOW MODE SWITCH
1.
Check continuity between snow mode switch terminals 1 and 4
under the following conditions.
2.
If NG, replace snow mode switch.
If OK, go to following step.
3.
Check continuity between snow mode switch terminals 2 and 4
under the following conditions.
4.
If NG, replace snow mode switch.
CONDITION
CONTINUITY
Snow mode switch: ON
Should exist
Snow mode switch: OFF
Should not exist
PBIB2563E
CONDITION
CONTINUITY
1
Should exist
2
Should not exist
PBIB2564E
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
EC-1187
< SERVICE INFORMATION >
[VK45DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
Description
INFOID:0000000001327082
SYSTEM DESCRIPTION
*: The ECM determines the start signal status by the signals of engine speed and battery voltage.
When the engine is running at low or medium speed, the power valve isfully closed. Under this condition, the
effective suction port length is equivalentto the total length of the intake manifold collector's suction port includ-
ingthe intake valve. This long suction port provides increased air intake whichresults in improved suction effi-
ciency and higher torque generation.
The surge tank and one-way valve are provided. When engine is runningat high speed, the ECM sends the
signal to the VIAS control solenoid valve.This signal introduces the intake manifold vacuum into the power
valve actuatorand therefore opens the power valve to two suction passages together in thecollector.
Under this condition, the effective port length is equivalent to thelength of the suction port provided indepen-
dently for each cylinder. Thisshortened port length results in enhanced engine output with reduced suctionre-
sistance under high speeds.
The power valve is always open regardless of the engine speed when gear position is in N or P.
COMPONENT DESCRIPTION
Power Valve
Sensor
Input signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed*
VIAS control
VIAS control solenoid valve
Mass air flow sensor
Amount of intake air
Throttle position sensor
Throttle position
Accelerator pedal position sensor
Accelerator pedal position
Battery
Battery voltage*
Engine coolant temperature sensor
Engine coolant temperature
PBIB1876E
EC-1188
< SERVICE INFORMATION >
[VK45DE]
VARIABLE INDUCTION AIR CONTROL SYSTEM (VIAS)
The power valve is installed in intake manifold collector and used to
control the suction passage of the variable induction air control sys-
tem. It is set in the fully closed or fully opened position by the power
valve actuator (1) operated by the vacuum stored in the surge tank.
The vacuum in the surge tank is controlled by the VIAS control sole-
noid valve.
•
: Vehicle front
VIAS Control Solenoid Valve
The VIAS control solenoid valve (1) cuts the intake manifold vacuum
signal for power valve control. It responds to ON/OFF signals from
the ECM. When the solenoid is off, the vacuum signal from the
intake manifold is cut. When the ECM sends an ON signal the coil
pulls the plunger downward and feeds the vacuum signal to the
power valve actuator.
• Vacuum tank (2)
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000001327083
PBIB3237E
PBIB3236E
MONITOR ITEM
CONDITION
SPECIFICATION
VIAS S/V
• Selector lever: P or N
ON
• Engine speed: More than 5,000 rpm
• Selector lever: Except P or N
• Engine speed: Less than 5,000 rpm
OFF
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