Infiniti G35 (V35) Sedan. Manual - part 473

EC-38

< FUNCTION DIAGNOSIS >

[VQ35HR]

MULTIPORT FUEL INJECTION SYSTEM

 : Vehicle front

1.

Engine coolant temperature sensor

2.

A/F sensor 1 (bank 1)

3.

Crankshaft position sensor (POS)

1.

IPDM E/R

2.

Battery current sensor

3.

Refrigerant pressure sensor

 : Vehicle front

1.

Power steering pressure sensor

2.

Alternator

3.

Engine oil temperature sensor

 : Vehicle front

JMBIA0011ZZ

JMBIA0013ZZ

JMBIA0014ZZ

JMBIA0012ZZ

MULTIPORT FUEL INJECTION SYSTEM

EC-39

< FUNCTION DIAGNOSIS >

[VQ35HR]

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EC

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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

1.

ICC steering switch

2.

CANCEL switch

3.

RESUME/ACCELERATE switch

4.

SET/COAST switch

5.

DISTANCE switch

6.

MAIN switch

JMBIA0019ZZ

JMBIA0015ZZ

JMBIA0016ZZ

EC-40

< FUNCTION DIAGNOSIS >

[VQ35HR]

MULTIPORT FUEL INJECTION SYSTEM

Component Description

INFOID:0000000000956485

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

JMBIA0017ZZ

JMBIA0051ZZ

Component

Reference

A/F sensor 1

EC-187, "Description"

Accelerator pedal position sensor

EC-425, "Description"

Camshaft position sensor (PHASE)

EC-258, "Description"

Crankshaft position sensor (POS)

EC-254, "Description"

Engine coolant temperature sensor

EC-174, "Description"

Fuel injector

EC-455, "Description"

Heated oxygen sensor 2

EC-202, "Description"

Intake air temperature sensor

EC-171, "Description"

Knock sensor

EC-251, "Description"

Mass air flow sensor

EC-159, "Description"

Park/neutral position switch

EC-342, "Description"

Power steering pressure sensor

EC-334, "Description"

Throttle position sensor

EC-177, "Description"

Vehicle speed sensor

EC-328, "Description"

ELECTRIC IGNITION SYSTEM

EC-41

< FUNCTION DIAGNOSIS >

[VQ35HR]

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ELECTRIC IGNITION SYSTEM

System Diagram

INFOID:0000000000956486

System Description

INFOID:0000000000956487

INPUT/OUTPUT SIGNAL CHART

*1: This signal is sent to the ECM through CAN communication line.

*2: ECM determines the start signal status by the signals of engine speed and battery voltage.

SYSTEM DESCRIPTION

Firing order: 1 - 2 - 3 - 4 - 5 - 6
The ignition timing is controlled by the ECM to maintain the best air-fuel ratio for every running condition of the
engine. The ignition timing data is stored in the ECM.
The ECM receives information such as the injection pulse width and camshaft position sensor (PHASE) sig-
nal. Computing this information, ignition signals are transmitted to the power transistor.
During the following conditions, the ignition timing is revised by the ECM according to the other data stored in
the ECM.
• At starting
• During warm-up
• At  idle
• At low battery voltage
• During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not

JMBIA0072GB

Sensor

Input Signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)

Engine speed*

2

Piston position

Ignition timing 
control

Ignition coil (with power tran-
sistor)

Camshaft position sensor (PHASE)

Mass air flow sensor

Amount of intake air

Engine coolant temperature sensor

Engine coolant temperature

Throttle position sensor

Throttle position

Accelerator pedal position sensor

Accelerator pedal position

Park/neutral position (PNP) switch

Gear position

Battery

Battery voltage*

2

Knock sensor

Engine knocking

Unified meter and A/C amp.

Vehicle speed*

1