Infiniti FX35 / FX45. Manual - part 528

DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION

EC-873

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Wiring Diagram

INFOID:0000000001326704

BANK 1

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

CAUTION:

TBWM1332E

EC-874

< SERVICE INFORMATION >

[VK45DE]

DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION

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-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

2

P

A/F sensor 1 heater
(Bank 1)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 5V

16

R

A/F sensor 1 (Bank 1)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 3.1V

35

G

Approximately 2.6V

56

B

Approximately 2.3V

75

OR

Approximately 2.3V

21
22
23
44

W
R
P
OR

Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel 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: 2,000 rpm

BATTERY VOLTAGE

(11 - 14V)

PBIB1584E

PBIB0042E

PBIB0043E

DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION

EC-875

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

BANK 2

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

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.

TBWM1333E

EC-876

< SERVICE INFORMATION >

[VK45DE]

DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION

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

Diagnosis Procedure

INFOID:0000000001326705

1.

CHECK EXHAUST GAS LEAK

1.

Start engine and run it at idle.

2.

Listen for an exhaust gas leak before three way catalyst (manifold).

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace.

2.

CHECK FOR INTAKE AIR LEAK

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

24

P

A/F sensor 1 heater
(Bank 2)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 5V

40
41
42
63

PU
BR
B
G

Fuel injector No. 6
Fuel injector No. 4 
Fuel injector No. 2
Fuel injector No. 8

[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)

57

G

A/F sensor 1 (Bank 2)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 2.6V

58

L

Approximately 2.3V

76

R

Approximately 3.1V

77

OR

Approximately 2.3V

PBIB1584E

PBIB0042E

PBIB0043E

PBIB1216E