Infiniti FX35, FX50 (S51). Manual - part 627

 

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Infiniti FX35, FX50 (S51). Manual - part 627

 

 

MULTIPORT FUEL INJECTION SYSTEM

EC-49

< SYSTEM DESCRIPTION >

[VQ35HR]

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Knock sensor

EC-265, "Description"

Mass air flow sensor

EC-168, "Description"

Power steering pressure sensor

EC-351, "Description"

Throttle position sensor

EC-189, "Description"

Component

Reference

EC-50

< SYSTEM DESCRIPTION >

[VQ35HR]

ELECTRIC IGNITION SYSTEM

ELECTRIC IGNITION SYSTEM

System Diagram

INFOID:0000000005236702

System Description

INFOID:0000000005236703

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 signal. Comput-
ing 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

Engine speed*

& Piston position

Ignition timing 
control

Ignition coil (with power tran-
sistor)

Camshaft position sensor

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

TCM

Gear position

Battery

Battery voltage*

2

Knock sensor

Engine knocking

Unified meter and A/C amp.

Vehicle speed*

1

ELECTRIC IGNITION SYSTEM

EC-51

< SYSTEM DESCRIPTION >

[VQ35HR]

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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:0000000005568461

1.

IPDM E/R

2.

Battery current sensor

3.

Cooling fan relay

4.

Mass air flow sensor (with intake air 
temperature sensor) (bank 1)

5.

Refrigerant pressure sensor

6.

Cooling fan motor-2

7.

Intake valve timing control solenoid 
valve

8.

Exhaust valve timing control magnet 
retarder

9.

Cooling fan control module

10. Cooling fan motor-1

11.

Mass air flow sensor (with intake air 
temperature sensor) (bank 2)

12. ICC brake hold relay (ICC models)

13. Ignition coil (with power transistor) 

and spark plug (bank 2)

14. Electric throttle control actuator 

(bank 2)

15. A/F sensor 1 (bank 2)

16. Fuel injector (bank 2)

17. Camshaft position sensor

18. Engine coolant temperature sensor

19. Knock sensor

20. Exhaust valve timing control position 

sensor

21. EVAP canister purge volume control 

solenoid valve

22. Fuel injector (bank 1)

23. Ignition coil (with power transistor) 

and spark plug (bank 1)

24. EVAP service port

25. A/F sensor 1 (bank 1)

26. Crankshaft position sensor

27. Electric throttle control actuator 

(bank 1)

JMBIA1496ZZ

EC-52

< SYSTEM DESCRIPTION >

[VQ35HR]

ELECTRIC IGNITION SYSTEM

1.

Mass air flow sensor (with intake air 
temperature sensor) (bank 1)

2.

Mass air flow sensor (with intake air 
temperature sensor) (bank 2)

1.

Electric throttle control actuator 
(bank 1)

2.

Electric throttle control actuator 
(bank 2)

1.

Cooling fan control module

2.

Cooling fan motor-1

3.

Cooling fan motor-2

4.

Cooling fan relay

JMBIA1497ZZ

JMBIA0004ZZ

JMBIA1498ZZ

 

 

 

 

 

 

 

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