Nissan Teana J32. Instruction — part 373

EC-30

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

MULTIPORT FUEL INJECTION SYSTEM

FUEL INJECTION TIMING

Two types of systems are used.
• Sequential Multiport Fuel Injection System

Fuel is injected into each cylinder during each engine cycle according to the firing order. This system is used
when the engine is running.

• Simultaneous Multiport Fuel Injection System

Fuel is injected simultaneously into all six cylinders twice each engine cycle. In other words, pulse signals of
the same width are simultaneously transmitted from the ECM.
The six injectors will then receive the signals 2 times for each engine cycle.
This system is used when the engine is being started and/or if the fail-safe system (CPU) is operating.

FUEL SHUT-OFF

Fuel to each cylinder is cut off during deceleration, operation of the engine at excessively high speeds or oper-
ation of the vehicle at excessively high speeds.

SEF179U

MULTIPORT FUEL INJECTION SYSTEM

EC-31

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Component Parts Location

INFOID:0000000003857771

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

EC-32

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

MULTIPORT FUEL INJECTION SYSTEM

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

MULTIPORT FUEL INJECTION SYSTEM

EC-33

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1.

Crankshaft position sensor (POS)

2.

Camshaft position sensor (PHASE)
(bank 2)

3.

Camshaft position sensor (PHASE)
(bank 1)

: Vehicle front

1.

Refrigerant pressure sensor

2.

Battery current sensor

: Vehicle front

1.

ECM

2.

Fuel pump fuse

3.

IPDM E/R

: Vehicle front

JMBIA1378ZZ

JMBIA1379ZZ

PBIB1686E