Infiniti G37 Coupe. Manual — part 479
INTAKE VALVE TIMING CONTROL
EC-97
< FUNCTION DIAGNOSIS >
[VQ37VHR]
C
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EC
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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)
Crankshaft position sensor (POS)
Engine coolant temperature sensor
Intake valve timing control solenoid valve
Vehicle speed sensor
VVEL SYSTEM
EC-99
< FUNCTION DIAGNOSIS >
[VQ37VHR]
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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
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