Infiniti FX35 / FX45. Manual - part 598

FUEL INJECTOR

EC-1153

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Provide battery voltage between the following terminals, and then
interrupt it. Listen to each fuel injector operating sound.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

6.

CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT

1.

Disconnect fuel injector harness connectors.

2.

Check harness continuity between the following terminals. Refer to Wiring Diagram.

3.

Also check harness for short to ground and short to power.

Cylinder

Harness connector

terminal

(+)

(–)

1

F201

5

3

3

2

5

1

7

6

2

F221

5

3

4

2

6

1

8

6

Operating sound should exist.

PBIB2449E

: Vehicle front

1.

Fuel injector (Bank 2)

2.

Fuel injector (Bank 1)

Harness connector terminal

Fuel injector terminal

F201 terminal 1

2

F201 terminal 2

F201 terminal 3

F201 terminal 6

F201 terminal 5

1

F221 terminal 1

2

F221 terminal 2

F221 terminal 3

F221 terminal 6

F221 terminal 5

1

Continuity should exist.

PBIB3235E

EC-1154

< SERVICE INFORMATION >

[VK45DE]

FUEL INJECTOR

OK or NG

OK

>> GO TO 7.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

7.

CHECK FUEL INJECTOR

Refer to 

EC-1154, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

>> Replace fuel injector.

8.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-717

.

>> INSPECTION END

Component Inspection

INFOID:0000000001327055

FUEL INJECTOR

1.

Disconnect fuel injector harness connector.

2.

Check resistance between terminals as shown in the figure.

Removal and Installation

INFOID:0000000001327056

FUEL INJECTOR

Refer to 

EM-190

.

Resistance: 13.5 - 17.5

Ω

 [at 10 - 60

°

C (50 - 140

°

F)]

PBIB1727E

FUEL PUMP

EC-1155

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

FUEL PUMP

Description

INFOID:0000000001327057

SYSTEM DESCRIPTION

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

The ECM activates the fuel pump for several seconds after the ignition switch is turned ON to improve engine
startability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows
that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when
the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.

COMPONENT DESCRIPTION

A turbine type design fuel pump is used in the fuel tank.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001327058

Specification data are reference values.

Sensor

Input signal to ECM

ECM Function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

Fuel pump control

Fuel pump relay

Battery

Battery voltage*

Condition

Fuel pump operation

Ignition switch is turned to ON.

Operates for 1 second.

Engine running and cranking

Operates.

When engine is stopped

Stops in 1.5 seconds.

Except as shown above

Stops.

PBIB1508E

MONITOR ITEM

CONDITION

SPECIFICATION

FUEL PUMP RLY

• For 1 seconds after turning ignition switch: ON
• Engine running or cranking

ON

• Except above

OFF

EC-1156

< SERVICE INFORMATION >

[VK45DE]

FUEL PUMP

Wiring Diagram

INFOID:0000000001327059

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

TBWM1363E