Infiniti M35/M45 Y50. Manual - part 410

TROUBLE DIAGNOSIS

EC-113

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

TBWT1469E

EC-114

[VQ35DE]

TROUBLE DIAGNOSIS

ECM Harness Connector Terminal Layout

NBS004T5

ECM Terminals and Reference Value

NBS004T6

PREPARATION

1.

ECM (1) is located behind the passenger side instrument lower
panel. For this inspection, remove passenger side instrument
lower panel.

2.

Remove ECM harness connector.

3.

When disconnecting ECM harness connector, loosen (A) it with
levers (2) as far as they will go as shown in the figure.

●

ECM (1)

●

Fasten (B)

4.

Connect a break-out box (SST) and Y-cable adapter (SST)
between the ECM and ECM harness connector.

●

Use extreme care not to touch 2 pins at one time.

●

Data is for comparison and may not be exact.

ECM INSPECTION TABLE

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

MBIB0045E

PBIB2703E

PBIB2714E

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

1

B

ECM ground

[Engine is running]

●

Idle speed

Body ground

2

SB

A/F sensor 1 heater
(bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 5V

PBIB1584E

TROUBLE DIAGNOSIS

EC-115

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

3

R

Throttle control motor relay 
power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

4

W

Throttle control motor 
(Close)

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D 

●

Accelerator pedal: Fully released

0 - 14V

5

B

Throttle control motor 
(Open)

[Ignition switch: ON]

●

Engine stopped

●

Selector lever: D 

●

Accelerator pedal: Fully depressed

0 - 14V

6

R/L

Heated oxygen sensor 2 
heater (bank 2)

[Engine is running]

●

Engine speed: Below 3,600 rpm after the 
following 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

W/G

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 2,000rpm 
quickly

7 - 12V

11

W/R

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 2,000rpm 
quickly

7 - 12V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1104E

PBIB1105E

PBIB1790E

PBIB1790E

EC-116

[VQ35DE]

TROUBLE DIAGNOSIS

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

13

W

Crankshaft position sensor 
(POS)

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm 
at idle

1.0 - 2.0V

[Engine is running]

●

Engine speed: 2,000 rpm

1.0 - 2.0V

14

L

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/W

A/F sensor 1 (bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 3.1V

35

BR/W

Approximately 2.6V

56

G

Approximately 2.3V

75

GR

Approximately 2.3V

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1041E

PBIB1042E

PBIB1039E

PBIB1040E