Infiniti G37 Coupe. Manual - part 479

INTAKE VALVE TIMING CONTROL

EC-97

< FUNCTION DIAGNOSIS >

[VQ37VHR]

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 : Vehicle front

1.

Power steering pressure sensor

2.

Alternator

3.

Engine oil temperature sensor

 : Vehicle front

1.

EVAP service port

2.

EVAP canister purge volume control 
solenoid valve

3.

EVAP canister

4.

EVAP canister vent control valve

5.

EVAP control system pressure sen-
sor

 : Vehicle front

1.

Fuel level sensor unit and fuel pump 
harness connector

2.

Fuel level sensor unit and fuel pump 3.

Fuel pressure regulator

4.

Fuel tank temperature sensor

1.

Accelerator pedal position sensor

2.

ECM

JMBIA0845ZZ

JMBIA0019ZZ

JMBIA0015ZZ

EC-98

< FUNCTION DIAGNOSIS >

[VQ37VHR]

INTAKE VALVE TIMING CONTROL

Component Description

INFOID:0000000001733963

1.

ICC steering switch

2.

CANCEL switch

3.

RESUME/ACCELERATE switch

4.

SET/COAST switch

5.

DISTANCE switch

6.

MAIN switch

1.

ASCD steering switch

2.

CANCEL switch

3.

RESUME/ACCELERATE switch

4.

SET/COAST switch

5.

MAIN switch

1.

Stop lamp switch

2.

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

3.

Brake pedal

4.

ASCD clutch switch (ASCD models)
ICC clutch switch (ICC models)

5.

Clutch pedal

JMBIA0016ZZ

JMBIA0017ZZ

JMBIA0051ZZ

Component

Reference

Camshaft position sensor (PHASE)

EC-268, "Description"

Crankshaft position sensor (POS)

EC-264, "Description"

Engine coolant temperature sensor

EC-184, "Description"

Intake valve timing control solenoid valve

EC-162, "Description"

Vehicle speed sensor

EC-337, "Description"

VVEL SYSTEM

EC-99

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VVEL SYSTEM

System Diagram

INFOID:0000000001841366

System Description

INFOID:0000000001841367

INPUT/OUTPUT SIGNAL CHART

*: This signal is sent to the ECM through 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
shifting the link supporting point. As a result, valve lift changes continuously to improve engine output and
response.

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

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

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* 

EC-100

< FUNCTION DIAGNOSIS >

[VQ37VHR]

VVEL SYSTEM

Component Parts Location

INFOID:0000000001910710

1.

Battery current sensor

2.

IPDM E/R

3.

VVEL control module

4.

Cooling fan relay

5.

VVEL actuator motor relay

6.

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

7.

Refrigerant pressure sensor

8.

Camshaft position sensor (PHASE) 
(bank 1)

9.

Cooling fan motor-2

10. Intake valve timing control solenoid 

valve (bank 1)

11.

Cooling fan control module

12. Cooling fan motor-1

13. Intake valve timing control solenoid 

valve (bank 2)

14. Camshaft position sensor (PHASE) 

(bank 2)

15. Mass air flow sensor (with intake air 

temperature sensor) (bank 2)

16. ICC brake hold relay (ICC models)

17. Brake booster pressure sensor

18. Ignition coil (with power transistor) 

and spark plug (bank 2)

19. Electric throttle control actuator 

(bank 2)

20. A/F sensor 1 (bank 2)

21. Fuel injector (bank 2)

22. VVEL control shaft position sensor 

(bank 2)

23. VVEL actuator motor (bank 2)

24. Manifold absolute pressure (MAP) 

sensor

25. Engine coolant temperature sensor

26. Knock sensor

27. Fuel injector (bank 1)

28. VVEL actuator motor (bank 1)

29. EVAP canister purge volume control 

solenoid valve

30. VVEL control shaft position sensor 

(bank 1)

JMBIA0837ZZ