Infiniti G35 (V35). Manual — part 443

FUEL INJECTOR

EC-653

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EC

Wiring Diagram

NBS0011P

TBWM1621E

EC-654

FUEL INJECTOR

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.)

Diagnostic Procedure

NBS0011Q

1.

INSPECTION START

Turn ignition switch to START.
Is any cylinder ignited?

Yes or No

Yes (With CONSULT-II)>>GO TO 2.
Yes (without CONSULT-II)>>GO TO 3.
No

>> GO TO 6.

2.

CHECK OVERALL FUNCTION

With CONSULT-II

1.

Start engine.

2.

Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.

3.

Make sure that each circuit produces a momentary engine
speed drop.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

21
22
23
40
41
42

G
R/Y
R/B
P
R/L
R/W

Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 6
Fuel injector No. 4
Fuel injector No. 2

[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: 2,000 rpm

BATTERY VOLTAGE

(11 - 14V)

SEC984C

SEC985C

PBIB0133E

FUEL INJECTOR

EC-655

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EC

3.

CHECK FUNCTION OF FUEL INJECTOR-I

Without CONSULT-II

1.

Turn ignition switch OFF.

2.

Disconnect harness connector F33, F221

3.

Turn ignition switch ON.

4.

Check voltage between harness connector F33 terminal 5 and
ground with CONSULT-II or tester.

5.

Turn ignition switch OFF.

6.

Disconnect ECM harness connector.

7.

Check harness continuity between harness connector F33 and
ECM as follows.
Refer to Wiring Diagram.

8.

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

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M72, F102

●

Fuse block (J/B) connector M4

●

10A fuse

●

Harness for open or short between harness connector F33 and fuse

●

Harness for open or short between harness connector F33 and ECM

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

PBIB2479E

Voltage: Battery voltage

Cylinder

Harness connector F33

terminal

ECM terminal

1

6

23

2

4

42

3

2

22

4

3

41

5

1

21

6

7

40

Continuity should exist.

PBIB2323E

EC-656

FUEL INJECTOR

5.

CHECK FUNCTION OF FUEL INJECTOR-II

Provide battery voltage between harness connector F221 as follows
and then interrupt it. Listen to each fuel injector operating sound.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

6.

CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector harness connector.

3.

Turn ignition switch ON.

4.

Check voltage between fuel injector terminal 1 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

Cylinder

Harness connector F221 terminal

(+)

(–)

1

5

6

2

4

3

2

4

3

5

1

6

7

Operating sound should exist.

PBIB2497E

PBIB0997E

Voltage: Battery voltage

PBIB0582E