Nissan Teana J32. Manual - part 389

EC-94

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

VARIABLE INDUCTION AIR SYSTEM

In the medium speed range, the power valves are closed. 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, charg-
ing efficiency is increased together with the effect of the long intake passage.
However, in the high speed range, the power valves are open. 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 (valves 1 and 2 for VQ35DE engine and a valve for VQ25DE engine) are opened or
closed in other ranges mentioned above. Thus maximum charging efficiency is obtained for the various driving
conditions.

VACUUM HOSE DRAWING (VQ35DE engine)

VACUUM HOSE DRAWING (VQ25DE engine)

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

EC-95

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1.

Power valve actuator

2.

VIAS control solenoid valve

3.

Intake manifold collector

JMBIA1522ZZ

EC-96

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

VARIABLE INDUCTION AIR SYSTEM

Component Parts Location

INFOID:0000000003860679

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.

Cooling fan motor-2

6.

A/F sensor 1 (bank 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. Power valve actuator 2 (VQ35DE 

models)

19. EVAP canister purge volume control 

solenoid valve

20. Camshaft position sensor (PHASE) 

(bank 1)

21. Ignition coil (with power transistor) 

and spark plug (bank 1)

22. A/F sensor 1 (bank 1)

23. Fuel injector (bank 1)

24. VIAS control solenoid valve 1 and 2 

(VQ35DE models)

25. Power valve actuator 1

JMBIA1373ZZ

VARIABLE INDUCTION AIR SYSTEM

EC-97

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1.

Mass 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.

EVAP canister

: Vehicle front

1.

Knock sensor (bank 1)

2.

Knock sensor (bank 2)

3.

Knock sensor

: Vehicle front

JMBIA1374ZZ

JMBIA1375ZZ

JMBIA1376GB

JMBIA1377ZZ