Infiniti EX35. Manual — part 587

EC-90

< FUNCTION DIAGNOSIS >

[VQ35HR]

EXHAUST VALVE TIMING CONTROL

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

: Vehicle front

1.

Accelerator pedal position sensor

2.

ECM

1.

ICC steering switch

2.

CANCEL switch

3.

RESUME/ACCELERATE switch

4.

SET/COAST switch

5.

MAIN switch

6.

DISTANCE switch

7.

LDP switch

JMBIA1182ZZ

JMBIA0015ZZ

JMBIA1308ZZ

EXHAUST VALVE TIMING CONTROL

EC-91

< FUNCTION DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

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J

K

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EC

N

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Component Description

INFOID:0000000003133279

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

JMBIA0017ZZ

JMBIA0312ZZ

Component

Reference

Camshaft position sensor (PHASE)

EC-256, "Description"

Crankshaft position sensor (POS)

EC-252, "Description"

Engine oil temperature sensor

EC-234, "Description"

Exhaust valve timing control magnet retarder

EC-154, "Description"

Exhaust valve timing control position sensor

EC-344, "Description"

EC-92

< FUNCTION DIAGNOSIS >

[VQ35HR]

INTAKE VALVE TIMING CONTROL

INTAKE VALVE TIMING CONTROL

System Diagram

INFOID:0000000003133280

System Description

INFOID:0000000003133281

INPUT/OUTPUT SIGNAL CHART

*: This signal is sent to the ECM through 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 (IVT) control sole-
noid 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.

JMBIA1317GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed and piston position

Intake valve
timing control

Intake valve timing control
solenoid valve

Camshaft position sensor (PHASE)

Engine oil temperature sensor

Engine oil temperature

Engine coolant temperature sensor

Engine coolant temperature

Unified meter and A/C amp.

Vehicle speed*

JMBIA0060GB

INTAKE VALVE TIMING CONTROL

EC-93

< FUNCTION DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Component Parts Location

INFOID:0000000003738638

1.

Battery current sensor

2.

IPDM E/R

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 (PHASE)

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 (POS)

27. Electric throttle control actuator

(bank 1)

JMBIA0002ZZ