Nissan Murano. Manual - part 500

EC-110

< SYSTEM DESCRIPTION >

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VARIABLE INDUCTION AIR SYSTEM

VARIABLE INDUCTION AIR SYSTEM

System Diagram

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System Description

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INPUT/OUTPUT SIGNAL CHART

*: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTION

In the medium speed range, the ECM sends the ON signal to the VIAS control solenoid valve. This signal
introduces the intake manifold vacuum into the power valve actuator and therefore closes the power valve.

JMBIA1831GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

VIAS control

VIAS control solenoid valve 1
VIAS control solenoid valve 2

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Battery

Battery voltage*

JMBIA0181GB

VARIABLE INDUCTION AIR SYSTEM

EC-111

< SYSTEM DESCRIPTION >

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Under this condition, the pressure waves of the exhaust stroke do not disturb the pressure waves of the intake
stroke of each opposite bank. Therefore, charging efficiency is increased together with the effect of the long
intake passage.
However, in the high speed range, the ECM sends the OFF signal to the VIAS control solenoid valve and the
power valve is opened. Under this condition, the pressure waves of intake stroke are resonant with those of
each opposite bank exhaust stroke. Therefore, charging efficiency is also increased.
In addition, both valves 1 and 2 are opened or closed in other ranges mentioned above. Thus maximum
charging efficiency is obtained for the various driving conditions.

VACUUM HOSE DRAWING

1.

Power valve actuator 1

2.

VIAS control solenoid valve 1

3.

VIAS control solenoid valve 2

4.

Power valve actuator 2

5.

Intake manifold collector

JMBIA0172ZZ

EC-112

< SYSTEM DESCRIPTION >

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VARIABLE INDUCTION AIR SYSTEM

Component Parts Location

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1.

Intake valve timing control solenoid 
valve (bank 1)

2.

Intake valve timing control solenoid 
valve (bank 2)

3.

Electronic controlled engine mount 
control solenoid valve

4.

Fuel injector (bank 2)

5.

A/F sensor 1 (bank 2)

6.

Cooling fan motor-2

7.

Ignition coil (with power transistor) 
and spark plug (bank 2)

8.

Camshaft position sensor (PHASE) 
(bank 2)

9.

Crankshaft position sensor (POS)

10. Engine coolant temperature sensor

11.

Cooling fan motor-1

12. ECM

13. Refrigerant pressure sensor

14. Battery current sensor

15. IPDM E/R

16. Mass air flow sensor (with intake air 

temperature sensor)

17. Electric throttle control actuator

18. EVAP service port

19. Power valve actuator 2

20. EVAP canister purge volume control 

solenoid valve

21. Camshaft position sensor (PHASE) 

(bank 1)

22. Ignition coil (with power transistor) 

and spark plug (bank 1)

23. A/F sensor 1 (bank 1)

24. Fuel injector (bank 1)

25. VIAS control solenoid valve 1 and 2

26. Power valve actuator 1

JMBIA1108ZZ

VARIABLE INDUCTION AIR SYSTEM

EC-113

< SYSTEM DESCRIPTION >

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1.

Mas air flow sensor (with intake air 
temperature sensor)

2.

Electric throttle control actuator

: Vehicle front

1.

Ignition coil (with power transistor) 
and spark plug (bank 1)

2.

Fuel injector (bank 1)

3.

Fuel injector (bank 2)

4.

Ignition coil (with power transistor) 
and spark plug (bank 2)

5.

Knock sensor (bank 2)

6.

Knock sensor (bank 1)

: Vehicle front

1.

Crankshaft position sensor (POS)

2.

Camshaft position sensor (PHASE) 
(bank 1)

3.

Camshaft position sensor (PHASE) 
(bank 2)

: Vehicle front

JMBIA1109ZZ

JMBIA1110ZZ

JMBIA1114ZZ