Infiniti FX35 / FX45. Manual — part 337

TROUBLE DIAGNOSIS

EC-109

< SERVICE INFORMATION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ECM Harness Connector Terminal Layout

INFOID:0000000001325934

ECM Terminal and Reference Value

INFOID:0000000001325935

PREPARATION

ECM is located behind the passenger side instrument lower panel.
For this inspection, remove passenger side instrument lower panel.

ECM INSPECTION TABLE

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 ECMs transistor. Use a ground other than ECM terminals, such as the ground.

PBIB3368E

PBIB1578E

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

1

B

ECM ground

[Engine is running]
• Idle speed

Body ground

2

R/L

A/F sensor 1 heater
(bank 1)

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

Approximately 5V

3

R

Throttle control motor relay
power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

4

L/W

Throttle control motor
(Close)

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully released

0 - 14V

PBIB1584E

PBIB1104E

EC-110

< SERVICE INFORMATION >

[VQ35DE]

TROUBLE DIAGNOSIS

5

L/B

Throttle control motor
(Open)

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully depressed

0 - 14V

6

R

Heated oxygen sensor 2
heater (bank 2)

[Engine is running]
• Engine speed: Below 3,600 rpm after the fol-

lowing conditions are met

- Engine: After warming up
- Keeping the engine speed between 3,500

and 4,000 rpm for 1 minute and at idle for 1
minute under no load

0 - 1.0V

[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

10

OR

Intake valve timing control
solenoid valve (bank 2)

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

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
• Warm-up condition
• When revving engine up to 2,500 rpm quickly

7 - 12V

11

BR

Intake valve timing control
solenoid valve (bank 1)

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

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
• Warm-up condition
• When revving engine up to 2,500 rpm quickly

7 - 12V

12

R/G

Power steering pressure
sensor

[Engine is running]
• Steering wheel: Being turned

0.5 - 4.5V

[Engine is running]
• Steering wheel: Not being turned

0.4 - 0.8V

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1105E

PBIB1790E

PBIB1790E

TROUBLE DIAGNOSIS

EC-111

< SERVICE INFORMATION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

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EC

N

P

O

13

Y

Crankshaft position sensor
(POS)

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

NOTE:
The pulse cycle changes depending on rpm
at idle

Approximately 1.6V

[Engine is running]
• Engine speed: 2,000 rpm

Approximately 1.4V

14

BR

Camshaft position sensor
(PHASE) (bank 2)

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

NOTE:
The pulse cycle changes depending on rpm
at idle

1.0 - 4.0V

[Engine is running]
• Engine speed: 2,000 rpm

1.0 - 4.0V

15

W

Knock sensor

[Engine is running]
• Idle speed

Approximately 2.5V

16

G

A/F sensor 1 (bank 1)

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

Approximately 3.1V

35

B/R

Approximately 2.6V

56

L

Approximately 2.3V

75

R/B

Approximately 2.3V

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1041E

PBIB1042E

PBIB1039E

PBIB1040E

EC-112

< SERVICE INFORMATION >

[VQ35DE]

TROUBLE DIAGNOSIS

21
22
23

W
G
R

Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1

[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)

24

L

A/F sensor 1 heater
(Bank 2)

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

Approximately 5V

25

P

Heated oxygen sensor 2
heater (bank 1)

[Engine is running]
• Engine speed: Below 3,600 rpm after the fol-

lowing conditions are met

- Engine: After warming up
- Keeping the engine speed between 3,500

and 4,000 rpm for 1 minute and at idle for 1
minute under no load

0 - 1.0V

[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

32

OR

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

33

R/L

Camshaft position sensor
(PHASE) (bank 1)

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

NOTE:
The pulse cycle changes depending on rpm
at idle

1.0 - 4.0V

[Engine is running]
• Engine speed: 2,000 rpm

1.0 - 4.0V

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC984C

SEC985C

PBIB1584E

PBIB1039E

PBIB1040E