Infiniti FX35, FX50 (S51). Manual - part 640

EXHAUST VALVE TIMING CONTROL

EC-101

< SYSTEM DESCRIPTION >

[VQ35HR]

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4.

EVAP canister

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
(Without DCA system)

2.

Accelerator pedal position sensor
(With DCA system)

1.

Stop lamp switch

2.

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

3.

Brake pedal

4.

ECM

JMBIA1504ZZ

JMBIA1505ZZ

JMBIA1509ZZ

EC-102

< SYSTEM DESCRIPTION >

[VQ35HR]

EXHAUST VALVE TIMING CONTROL

Component Description

INFOID:0000000005236726

1.

ICC steering switch

2.

CANCEL switch

3.

RESUME/ACCELERATE switch

4.

SET/COAST switch

5.

DISTANCE switch

6.

MAIN switch

7.

LDP/DCA switch

1.

ASCD steering switch

2.

CANCEL switch

3.

RESUME/ACCELERATE switch

4.

SET/COAST switch

5.

MAIN switch

1.

Snow mode switch

JSBIA0155ZZ

JSBIA0156ZZ

JMBIA1623ZZ

Component

Reference

Camshaft position sensor

EC-273, "Description"

Crankshaft position sensor

EC-268, "Description"

Engine oil temperature sensor

EC-249, "Description"

Exhaust valve timing control magnet retarder

EC-165, "Description"

Exhaust valve timing control position sensor

EC-365, "Description"

INTAKE VALVE TIMING CONTROL

EC-103

< SYSTEM DESCRIPTION >

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INTAKE VALVE TIMING CONTROL

System Diagram

INFOID:0000000005236727

System Description

INFOID:0000000005236728

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 (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.

JMBIA1532GB

Sensor

Input signal to ECM

ECM function

Actuator

Crankshaft position sensor

Engine speed & 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*

JMBIA0060GB

EC-104

< SYSTEM DESCRIPTION >

[VQ35HR]

INTAKE VALVE TIMING CONTROL

Component Parts Location

INFOID:0000000005568467

1.

IPDM E/R

2.

Battery current sensor

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

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

27. Electric throttle control actuator 

(bank 1)

JMBIA1496ZZ