Nissan Altima L32. Manual - part 503

VARIABLE INDUCTION AIR SYSTEM

EC-1133

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VARIABLE INDUCTION AIR SYSTEM

System Diagram

INFOID:0000000004362002

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

EC-1134

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VARIABLE INDUCTION AIR SYSTEM

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 valves 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

VARIABLE INDUCTION AIR SYSTEM

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Component Parts Location

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1.

Power valve actuator 1

2.

Intake valve timing control solenoid 
valve (bank 1)

3.

Power steering pressure sensor

4.

Intake valve timing control solenoid 
valve (bank 2)

5.

VIAS control solenoid valves 1 and 2 6.

Fuel injector (bank 2)

7.

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

8.

Crankshaft position sensor (POS)

9.

Engine coolant temperature sensor

10. Camshaft position sensor (PHASE) 

(bank 2)

11. ECM

12. Refrigerant pressure sensor

13. Battery current sensor

14. PNP switch

15. Condenser-2

16. Mass air flow sensor (with intake air 

temperature sensor)

17. EVAP service port

18. Camshaft position sensor (PHASE) 

(bank 1)

19. Electric throttle control actuator

20. Power valve actuator 2

21. EVAP canister purge volume control 

solenoid valve

22. Ignition coil (with power transistor) 

and spark plug (bank 1)

23. Knock sensor

ALBIA0110ZZ

EC-1136

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VARIABLE INDUCTION AIR SYSTEM

1.

Mas air flow sensor (with intake air 
temperature sensor)

2.

Air cleaner case

3.

Engine coolant temperature sensor

4.

EVAP canister purge volume control 
solenoid valve

5.

Power valve actuator 1

6.

VIAS control solenoid valve 1

7.

VIAS control solenoid valve 2

8.

Power valve actuator 2

9.

Power steering pressure sensor

10. Tie rod (RH)

11. Power valve actuator 2

12. Camshaft position sensor (PHASE) 

(bank 1)

13. Camshaft position sensor (PHASE) 

(bank 2)
: Vehicle front

ALBIA0101ZZ