Infiniti FX35, FX50 (S51). Manual - part 786

INTAKE VALVE TIMING CONTROL

EC-685

< SYSTEM DESCRIPTION >

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INTAKE VALVE TIMING CONTROL

System Diagram

INFOID:0000000005237205

System Description

INFOID:0000000005237206

INPUT/OUTPUT SIGNAL CHART

*: This signal is sent to the ECM via the CAN communication line.

SYSTEM DESCRIPTION

This mechanism hydraulically controls cam phases continuously with the fixed operating angle of the intake
valve.
The ECM receives signals such as crankshaft position, camshaft position, engine speed, and engine coolant
temperature. Then, the ECM sends ON/OFF pulse duty signals to the intake valve timing control solenoid
valve depending on driving status. This makes it possible to control the shut/open timing of the intake valve to
increase engine torque in low/mid speed range and output in high speed range.

JMBIA1532GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor

Engine speed and piston position

Intake valve timing 
control

Intake valve timing control 
solenoid valve

Camshaft position sensor

Engine oil temperature sensor

Engine oil temperature

Engine coolant temperature sensor

Engine coolant temperature

Unified meter and A/C amp.

Vehicle speed*

PBIB3276E

EC-686

< SYSTEM DESCRIPTION >

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INTAKE VALVE TIMING CONTROL

Component Parts Location

INFOID:0000000005589027

1.

IPDM E/R

2.

VVEL control module

3.

Battery current sensor

4.

VVEL actuator motor relay

5.

Cooling fan relay-1

6.

Cooling fan relay-2

7.

Mass air flow sensor (bank 2)

8.

Refrigerant pressure sensor

9.

Exhaust valve timing control position 
sensor (bank 2)

10. Exhaust valve timing control sole-

noid valve (bank 2)

11.

Camshaft position sensor (bank 2)

12. Intake valve timing control solenoid 

valve (bank 2)

13. Cooling fan motor-1

14. Cooling fan control module-1

15. Cooling fan motor-2

16. Cooling fan control module-2

17. Intake valve timing control solenoid 

valve (bank 1)

18. Camshaft position sensor (bank 1)

19. Exhaust valve timing control sole-

noid valve (bank 1)

20. Exhaust valve timing control position 

sensor (bank 1)

21. Mass air flow sensor (with intake air 

temperature sensor) (bank 1)

22. ICC brake hold relay (ICC models)

23. Brake booster pressure sensor

24. Ignition coil (with power transistor) 

and spark plug (bank 1)

25. VVEL actuator motor (bank 1)

26. VVEL control shaft position sensor 

(bank 1)

27. Fuel injector (bank 1)

28. Electric throttle control actuator 

(bank 1)

29. A/F sensor 1 (bank 1)

30. Knock sensor (bank 1)

JMBIA1535ZZ

INTAKE VALVE TIMING CONTROL

EC-687

< SYSTEM DESCRIPTION >

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31. EVAP canister purge volume con-

trol solenoid valve

32. Manifold Absolute Pressure Sensor

(This sensor is not for controlling the 
engine system, nor for the on board 
diagnosis.)

33. Knock sensor (bank 2)

34. Crankshaft position sensor

35. Electric throttle control actuator 

(bank2)

36. VVEL actuator motor (bank 2)

37. VVEL control shaft position sensor 

(bank 2)

38. A/F sensor 1 (bank 2)

39. Engine coolant temperature sensor

40. Fuel injector (bank 2)

41. EVAP service port

42. Ignition coil (with power transistor) 

and spark plug (bank 2)

1.

Mass air flow sensor (bank 2)

2.

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

1.

Electric throttle control actuator 
(bank 2)

2.

Electric throttle control actuator 
(bank 1)

1.

Cooling fan relay-1

2.

Cooling fan relay-2

Vehicle front

JMBIA1536ZZ

JMBIA1537ZZ

JMBIA1538ZZ

EC-688

< SYSTEM DESCRIPTION >

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INTAKE VALVE TIMING CONTROL

1.

Cooling fan motor-1

2.

Cooling fan control module-1

3.

Cooling fan motor-2

4.

Cooling fan control module-2

 Vehicle front

JMBIA1539ZZ

JMBIA1576GB

1.

A/F sensor 1 (bank 1) 

2.

A/F sensor 1 (bank 2) 

 Vehicle front

JMBIA1540ZZ

JMBIA1541ZZ