Infiniti FX35, FX50 (S51). Manual - part 788

INTAKE VALVE TIMING CONTROL

EC-693

< SYSTEM DESCRIPTION >

[VK50VE]

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1.

Stop lamp switch

2.

ASCD brake switch (ASCD models)
ICC brake switch (ICC models)

3.

Brake pedal

4.

ECM

1.

ICC steering switch

2.

CANCEL switch

3.

RESUME/ACCELERATE switch

4.

SET/COAST switch

5.

DISTANCE switch

6.

MAIN switch

7.

LDP switch

1.

ASCD steering switch

2.

CANCEL switch

3.

RESUME/ACCELERATE switch

4.

SET/COAST switch

5.

MAIN switch

1.

Snow mode switch

JMBIA1509ZZ

JMBIA1507ZZ

JMBIA1508ZZ

JMBIA1623ZZ

EC-694

< SYSTEM DESCRIPTION >

[VK50VE]

INTAKE VALVE TIMING CONTROL

Component Description

INFOID:0000000005237208

Component

Reference

Camshaft position sensor

EC-877, "Description"

Crankshaft position sensor

EC-873, "Description"

Engine coolant temperature sensor

EC-790, "Description"

Intake valve timing control solenoid valve

EC-766, "Description"

VVEL SYSTEM

EC-695

< SYSTEM DESCRIPTION >

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VVEL SYSTEM

System Diagram

INFOID:0000000005237209

System Description

INFOID:0000000005237210

INPUT/OUTPUT SIGNAL CHART

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

SYSTEM DESCRIPTION

VVEL (Variable Valve Event & Lift) is a system that controls valve event and valve lift continuously. Rotational
movement of the drive shaft equipped with eccentric cam is transmitted to output cam via the rocker arm and
two kinds of links to depress the intake valve. ECM decides the target valve lift according to the driving condi-
tion and sends the command signal to the VVEL control module. The VVEL control module controls the rota-
tion of the control shaft using the VVEL actuator motor and changes the movement of the output cam by

JMBIA1569GB

Sensor

Input signal to ECM

ECM function

Actuator

Camshaft position sensor
Crankshaft position sensor

Engine speed and piston position

VVEL control

VVEL control module

↓

VVEL actuator sub assembly

Accelerator pedal position sensor

Accelerator pedal position

VVEL control shaft position sensor

Control shaft actual angle* 

1.

VVEL actuator motor

2.

VVEL control shaft position sensor

3.

Ball screw nut

4.

Ball screw shaft

5.

Rocker arm

6.

Link A

7.

Control shaft

8.

Eccentric cam

9.

Drive shaft

10. Valve lifter

11.

Intake valve

12. Link B

13. Output cam

JMBIA0739GB

EC-696

< SYSTEM DESCRIPTION >

[VK50VE]

VVEL SYSTEM

shifting the link supporting point. As a result, valve lift changes continuously to improve engine output and
response.

Component Parts Location

INFOID:0000000005589028

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