Nissan Maxima. Manual — part 392

EC-52

< SYSTEM DESCRIPTION >

[VQ35DE]

MULTIPORT FUEL INJECTION SYSTEM

1.

Knock sensor (bank 2) (view with in-
take manifold removed)

2.

Knock sensor (bank 1)

3.

Transmission range switch
(view with CVT removed)

4.

Battery

5.

IPDM E/R

6.

ECM

7.

Refrigerant pressure sensor (view
with front grille removed)

8.

Accelerator pedal position sensor

: Vehicle front

ALBIA0607ZZ

MULTIPORT FUEL INJECTION SYSTEM

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< SYSTEM DESCRIPTION >

[VQ35DE]

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Component Description

INFOID:0000000010094804

1.

Stop lamp switch

2.

ASCD brake switch

3.

ASCD steering switch

AWBIA0670ZZ

Component

Reference

A/F sensor 1

EC-218, "Description"

Accelerator pedal position sensor

EC-467, "Description"

Camshaft position sensor (PHASE)

EC-300, "Description"

Crankshaft position sensor (POS)

EC-296, "Description"

Engine coolant temperature sensor

EC-201, "Description"

Fuel injector

EC-496, "Description"

Heated oxygen sensor 2

EC-230, "Description"

Intake air temperature sensor

EC-198, "Description"

Knock sensor

EC-293, "Description"

Mass air flow sensor

EC-183, "Description"

TCM

EC-397, "Description"

Power steering pressure sensor

EC-386, "Description"

Throttle position sensor

EC-207, "Description"

EC-54

< SYSTEM DESCRIPTION >

[VQ35DE]

ELECTRIC IGNITION SYSTEM

ELECTRIC IGNITION SYSTEM

System Diagram

INFOID:0000000010094805

System Description

INFOID:0000000010094806

INPUT/OUTPUT SIGNAL CHART

*1: This signal is sent to the ECM via the CAN communication line.
*2: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTION

Ignition order: 1 - 2 - 3 - 4 - 5 - 6

The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the

engine. The ignition timing data is stored in the ECM.

The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-

nal. Computing this information, ignition signals are transmitted to the power transistor.

During the following conditions, the ignition timing is revised by the ECM according to the other data stored in

the ECM.

• At starting

• During warm-up

• At idle

• At low battery voltage

• During acceleration

The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed

within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not

JMBIA1527GB

Sensor

Input Signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed*

2

Piston position

Ignition timing
control

Ignition coil
(with power transistor)

Camshaft position sensor (PHASE)

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*

2

Knock sensor

Engine knocking

TCM

Gear position

Unified meter and A/C amp.

Vehicle speed*

1

ELECTRIC IGNITION SYSTEM

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< SYSTEM DESCRIPTION >

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operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.

The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.

Component Parts Location

INFOID:0000000010094807

1.

Intake valve timing control solenoid
valve (bank 1)

2.

Electronic controlled engine mount
control solenoid valve

3.

Exhaust valve timing control magnet
retarder (bank 2)

4.

Intake valve timing control solenoid
valve (bank 2)

5.

Knock sensor (bank 1 and 2)

6.

Fuel injector (bank 2)

7.

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

8.

Exhaust valve timing control position
sensor (bank 2)

9.

Crankshaft position sensor (POS)

10. Engine coolant temperature sensor

11. Camshaft position sensor (PHASE)

(bank 2)

12. Transmission range switch

13. Refrigerant pressure sensor

14. ECM

15. Battery current sensor

16. Condenser-2

17. EVAP canister purge volume control

solenoid valve

18. Mass air flow sensor (with intake air

temperature sensor)

19. Camshaft position sensor (PHASE)

(bank 1)

20. EVAP service port

21. Power valve actuator 2

22. Electric throttle control actuator

23. Exhaust valve timing control position

sensor (bank 1)

24. Ignition coil (with power transistor) and

spark plug (bank 1)

25. Fuel injector (bank 1)

26. VIAS control solenoid valve 1 and 2

27. Power valve actuator 1

28. Exhaust valve timing control magnet

retarder (bank 1)

29. Power steering pressure sensor

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