Infiniti F50. Manual - part 503

INJECTOR CIRCUIT

EC-653

C

D

E

F

G

H

I

J

K

L

M

A

EC

INJECTOR CIRCUIT

PFP:16600

Component Description

EBS00MO1

The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the needle valve back and allows
fuel to flow through the injector into the intake manifold. The amount
of fuel injected depends upon the injection pulse duration. Pulse
duration is the length of time the injector remains open. The ECM
controls the injection pulse duration based on engine fuel needs.

CONSULT-II Reference Value in Data Monitor Mode

EBS00MO2

Specification data are reference values.

SEF375Z

MONITOR ITEM

CONDITION

SPECIFICATION

INJ PULSE-B1
INJ PULSE-B2

●

Engine: After warming up

●

Selector lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

B/FUEL SCHDL

●

Engine: After warming up

●

Selector lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

2.3 - 2.9 msec

2,000 rpm

2.3 - 2.9 msec

EC-654

INJECTOR CIRCUIT

Wiring Diagram

EBS00MO3

TBWM0172E

INJECTOR CIRCUIT

EC-655

C

D

E

F

G

H

I

J

K

L

M

A

EC

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

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.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

5
7

14
16

B/W
BR
OR/L
OR

Injector No. 1
Injector No. 3
Injector No. 5
Injector No. 7

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm at idle.

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm

BATTERY VOLTAGE

(11 - 14V)

PBIB0042E

PBIB0043E

EC-656

INJECTOR CIRCUIT

TBWM0173E