Infiniti G37 Coupe. Manual - part 584

 

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Infiniti G37 Coupe. Manual - part 584

 

 

ECM

EC-517

< ECU DIAGNOSIS >

[VQ37VHR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.

*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to 

PG-3, "How to Handle Battery"

.

TERMINAL LAYOUT

PHYSICAL VALUES

NOTE:
• ECM is located behind the instrument assist lower panel. For this inspection, remove passenger side instru-

ment lower panel.

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

VVEL POSITION 
SEN-B1

• Engine: After warming up
• Selector lever: P or N (A/T), Neu-

tral (M/T)

• Air conditioner switch: OFF
• No  load

Idle

Approx. 0.25 - 1.40V

When revving engine up to 2,000 rpm 
quickly

Approx. 0.25 - 4.75V

VVEL POSITION 
SEN-B2

• Engine: After warming up
• Selector lever: P or N (A/T), Neu-

tral (M/T)

• Air conditioner switch: OFF
• No  load

Idle

Approx. 0.25 - 1.40V

When revving engine up to 2,000 rpm 
quickly

Approx. 0.25 - 4.75V

VVEL TIM-B1

• Engine: After warming up
• Selector lever: P or N (A/T), Neu-

tral (M/T)

• Air conditioner switch: OFF
• No  load

Idle

Approx. 0 - 20 deg

When revving engine up to 2,000 rpm 
quickly

Approx. 0 - 90 deg

VVEL TIM-B2

• Engine: After warming up
• Selector lever: P or N (A/T), Neu-

tral (M/T)

• Air conditioner switch: OFF
• No  load

Idle

Approx. 0 - 20 deg

When revving engine up to 2,000 rpm 
quickly

Approx. 0 - 90 deg

VVEL LEARN

• Ignition switch: OFF 

→

 ON

(After warming up)

VVEL learning has not been performed 
yet.

YET

VVEL learning has already been per-
formed successfully.

DONE

VVEL SEN LEARN-
B1

• VVEL learning has already been performed successfuly

Approx. 0.30 - 0.80V

VVEL SEN LEARN-
B2

• VVEL learning has already been performed successfuly

Approx. 0.30 - 0.80V

ALT DUTY

• Engine: Idle

0 - 80%

A/F ADJ B1

• Engine: Running

−

0.330 - 0.330

A/F ADJ B2

• Engine: Running

−

0.330 - 0.330

FAN DUTY

• Engine: Running

0 - 100%

ALT DUTY SIG

• Power generation voltage variable control: Operating

ON

• Power generation voltage variable control: Not operating

OFF

Monitor Item

Condition

Values/Status

JMBIA0070ZZ

EC-518

< ECU DIAGNOSIS >

[VQ37VHR]

ECM

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

1

(W)

128

(B)

A/F sensor 1 heater
(bank 1)

Output

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

(More than 140 seconds after starting 
engine)

2.9 - 8.8V

2

(G)

128

(B)

Throttle control motor 
(Open) (bank 1)

Output

[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully depressed

0 - 14V

[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: Fully released

0 - 14V

3

(R)

128

(B)

Throttle control motor re-
lay power supply (bank 
1)

Input

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

4

(BR)

128

(B)

Throttle control motor 
(Close) (bank 1)

Output

[Ignition switch: ON]
• Engine stopped
• Selector lever: D (A/T) or 1st (M/T)
• Accelerator pedal: In the middle of re-

leasing operation

0 - 14V

5

(GR)

128

(B)

A/F sensor 1 heater
(bank 2)

Output

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

(More than 140 seconds after starting 
engine)

2.9 - 8.8V

8

(B)

—

ECM ground

—

—

—

JMBIA0030GB

JMBIA0031GB

JMBIA0032GB

JMBIA0033GB

JMBIA0030GB

ECM

EC-519

< ECU DIAGNOSIS >

[VQ37VHR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

11

(GR)

128

(B)

Ignition signal No. 4

Output

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

NOTE:
The pulse cycle changes depending on 
rpm at idle

0 - 0.2V

12

(L)

Ignition signal No. 3

15

(V)

Ignition signal No. 5

16

(G)

Ignition signal No. 2

[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm

0.1 - 0.4V

19

(SB)

Ignition signal No. 6

20

(Y)

Ignition signal No. 1

17

(P)

128

(B)

Heated oxygen sensor 2 
heater (bank 1)

Output

[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

10V

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

BATTERY VOLTAGE
(11 - 14V)

18

(W)

128

(B)

Intake valve timing con-
trol solenoid valve (bank 
1)

Output

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

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
• Warm-up condition
• Engine speed: 2,000rpm

7 - 12V

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal  name

Input/

Output

JMBIA0035GB

JMBIA0036GB

JMBIA0037GB

JMBIA0038GB

EC-520

< ECU DIAGNOSIS >

[VQ37VHR]

ECM

21

(GR)

128

(B)

EVAP canister purge vol-
ume control solenoid 
valve

Output

[Engine is running]
• Idle speed
• Accelerator pedal: Not depressed even 

slightly, after engine starting

BATTERY VOLTAGE

(11 - 14V)

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

than 100 seconds after starting engine)

BATTERY VOLTAGE

(11 - 14V)

22

(R)

128

(B)

Fuel pump relay

Output

[Ignition switch: ON]
• For 1 second after turning ignition switch 

ON

[Engine is running]

0 - 1.5V

[Ignition switch: ON]
• More than 1 second after turning ignition 

switch ON

BATTERY VOLTAGE
(11 - 14V)

24

(P)

128

(B)

ECM relay
(Self shut-off)

Output

[Engine is running]
[Ignition switch: OFF]
• A few seconds after turning ignition 

switch OFF

0 - 1.5V

[Ignition switch: OFF]
• More than a few seconds after turning 

ignition switch OFF

BATTERY VOLTAGE
(11 - 14V)

25

(O)

128

(B)

Throttle control motor re-
lay

Output

[Ignition switch: ON 

→

 OFF]

0 - 1.0V 

↓

BATTERY VOLTAGE 
(11 - 14V) 

↓

0V

[Ignition switch: ON]

0 - 1.0V

28

(BR)

128

(B)

VVEL actuator motor re-
lay abort signal
[VVEL control module]

Output

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

0V

29

(G)

128

(B)

Intake valve timing con-
trol solenoid valve (bank 
2)

Output

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

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]
• Warm-up condition
• Engine speed: 2,000rpm

7 - 12V

Terminal No.

(Wire color)

Description

Condition

Value

(Approx.)

+

-–

Signal name

Input/

Output

JMBIA0039GB

JMBIA0040GB

JMBIA0038GB

 

 

 

 

 

 

 

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