Infiniti G35 (V35) Sedan. Manual - part 1313

 

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Infiniti G35 (V35) Sedan. Manual - part 1313

 

 

STC-142

< ECU DIAGNOSIS >

[WITH 4WAS]

4WAS FRONT CONTROL UNIT

ECU DIAGNOSIS

4WAS FRONT CONTROL UNIT

Reference Value

INFOID:0000000000958916

VALUES ON THE DIAGNOSIS TOOL

Monitor item

Condition

Value/Status

4WAS STR

 ANG

Steering wheel right turned

0 – 756 deg

Straight-ahead

Approx. 0 deg

Steering wheel left turned

0 – 

756 deg

VEHICLE SPEED

Vehicle stopped

0 km/h (0 MPH)

Vehicle running

CAUTION:

Check air pressure of tire under standard conditions.

Approximately equal to the indi-
cation on speedometer (Inside 
of 

±

10%)

MOTOR CURRENT

The steering wheel not steered.

Approx. 0 – 1 A

The steering wheel is steering.

Approx. 0 – 60 A

MTR CRNT ESTM

The steering wheel not steered.

Approx. 0 – 1 A

The steering wheel is steering.

Approx. 0 – 60 A

ACTR ROTA ANG

Steering wheel turned to the right (with vehicle stopped).

0 – 180 deg

Straight-ahead

Approx. 0 deg

Steering wheel turned to the left (with vehicle stopped).

0 – 

180 deg

LG VOLT

Ignition switch: ON

Engine running (idling)

Approx. 0 – 16 V

THERM TEMP

Engine running (idling)

40 – 100

°

C

MOTOR

 VOLT

                               I

gnition switch: ON

Engine running (idling)

Battery voltage

Engine stopped.

Battery voltage

IGN VOLT

Ignition switch: ON

Engine running (idling)

Battery voltage

Engine stopped.

Battery voltage

ACTR ANG COMM

Steering wheel turned to the right (with vehicle stopped).

0 – 180 deg

Straight-ahead

Approx. 0 deg

Steering wheel turned to the left (with vehicle stopped).

0 – 

180 deg

ACTR ROTA SPD

The steering wheel not steered.

0 deg/s

The steering wheel is steering.

Other than 0 deg/s

DUTY COMMAND

Ignition switch: ON

Engine running (idling)

0 – 100%

LOCK DTY COMM

Ignition switch: ON

Engine running (idling)

0 – 100%

MTR U VOLT

Ignition switch: ON

Engine running (idling)

Approx. 0 – 20 V

Engine stopped.

0 V

MTR V VOLT

Ignition switch: ON

Engine running (idling)

Approx. 0 – 20 V

Engine stopped.

0 V

MTR W VOLT

Ignition switch: ON

Engine running (idling)

Approx. 0 – 20 V

Engine stopped.

0 V

ACT TEMP ESTM

Engine running (idling)

40 – 100

°

C

MTR PHZ CRNT

The steering wheel is steering.

Approx. 0 – 60 A

ACTR DEVI ANG

The steering wheel is steering.

30 – 30 deg

4WAS FRONT CONTROL UNIT

STC-143

< ECU DIAGNOSIS >

[WITH 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

ACTR ANGL SUB

Steer the steering wheel leftward slowly. Steer until the steering 
stops.

0 – 

180 deg

Steer the steering wheel rightward slowly. Steer until the steering 
stops.

0 – 180 deg

STR ANGL SPD

The steering wheel not steered.

0 deg/s

The steering wheel is steering.

Other than 0 deg/s

OVRLD JDG TMG

It displays record of 4WAS system (entire 4WAS system) high 
load.
(It displays time of occurrence before turning ignition switch ON.)

0 – 39

ACT PRTCT TMG

It displays record of 4WAS system (4WAS front actuator) over-
heating.
(It displays time of occurrence before turning ignition switch ON.)

0 – 39

ECU PRTCT TMG

It displays record of 4WAS system (4WAS front control unit) over-
heating.
(It displays time of occurrence before turning ignition switch ON.)

0 – 39

DRV TMPO TMG

It displays record of 4WAS system (terminal power supply convert-
er of 4WAS front motor) intermittent abnormal.
(It displays time of occurrence before turning ignition switch ON.)

0 – 39

MTR PW TMP TM

It displays record of 4WAS system (terminal voltage of 4WAS front 
motor) intermittent abnormal.
(It displays time of occurrence before turning ignition switch ON.)

0 – 39

LOW VOLT TMG

It displays record of 4WAS system (terminal voltage of 4WAS front 
control unit and 4WAS front actuator) low voltage.
(It displays time of occurrence before turning ignition switch ON.)

0 – 39

HIGH VOLT TMG

It displays record of 4WAS system (terminal voltage of 4WAS front 
control unit and 4WAS front actuator) extreme voltage.
(It displays time of occurrence before turning ignition switch ON.)

0 – 39

OVRLD JDG FLG

4WAS system (the entire 4WAS system) heavy load condition 
judgment
(Condition detected in past and present.)

On

4WAS system (the entire 4WAS system) heavy load condition 
judgment
(Condition not detected in past and present.)*

Off

ACT PRTCT FLG

4WAS front actuator overheat condition judgment
(Condition detected in past and present.)

On

4WAS front actuator overheat condition judgment
(Condition not detected in past and present.)*

Off

ECU PRTCT FLG

4WAS front control unit overheat condition judgment
(Condition detected in past and present.)

On

4WAS front control unit overheat condition judgment
(Condition not detected in past and present.)*

Off

DRV TMPO FLG

4WAS system (4WAS front motor terminal power supply convert-
er) intermittent error.
(Condition detected in past and present.)

On

4WAS system (4WAS front motor terminal power supply convert-
er) intermittent error.
(Condition not detected in past and present.)*

Off

MTR PW TMP FL

4WAS system (4WAS front motor terminal voltage) intermittent er-
ror.
(Condition detected in past and present.)

On

4WAS system (4WAS front motor terminal voltage) intermittent er-
ror.
(Condition not detected in past and present.)*

Off

Monitor item

Condition

Value/Status

STC-144

< ECU DIAGNOSIS >

[WITH 4WAS]

4WAS FRONT CONTROL UNIT

*: “Off” is indicated if the self-diagnosis result memory is erased.

TERMINAL LAYOUT

PHYSICAL VALUES

LOW VOLT FLG

4WAS system (4WAS front control unit and 4WAS front actuator 
terminal voltage) voltage-dropped condition
(Condition detected in past and present.)

On

4WAS system (4WAS front control unit and 4WAS front actuator 
terminal voltage) voltage-dropped condition
(Condition not detected in past and present.)*

Off

HIGH VOLT FLG

4WAS system (4WAS front control unit and 4WAS front actuator 
terminal voltage) over-voltage condition
(Condition detected in past and present.)

On

4WAS system (4WAS front control unit and 4WAS front actuator 
terminal voltage) over-voltage condition
(Condition not detected in past and present.)*

Off

MTR SEN U OUT

The steering wheel is steering.

HI 

 LOW

MTR SEN V OUT

The steering wheel is steering.

HI 

 LOW

MTR SEN W OUT

The steering wheel is steering.

HI 

 LOW

MAIN ECU FAIL

4WAS main control unit fail-safe mode

On

4WAS system is in the normal condition.
(When 4WAS main control unit is the normal condition.)

Off

M-ECU TMPO FL

4WAS main control unit protection function mode

On

4WAS system is in the normal condition.
(When 4WAS main control unit is the normal condition.)

Off

LOCK MODE

4WAS front lock sole-
noid valve (lock struc-
ture) condition

Lock released condition

0

Lock condition

1, 2, 3, 4, 5

NEUTRAL OUT

4WAS front actuator misaligned angle adjustment control is con-
trolled.

On

4WAS front actuator misaligned angle adjustment is not controlled.

Off

EX OPERAT

4WAS system enters in the protection function due to the heavy 
load condition and temporarily abnormal voltage.

On

4WAS system is in the normal condition.

Off

SLOW MODE

ACTIVE TEST “SLOW MODE” judgment condition
(Steer the steering wheel rightward and leftward slowly. Steer until 
the turning stops.)

Ok

Monitor item

Condition

Value/Status

JSGIA0015ZZ

4WAS FRONT CONTROL UNIT

STC-145

< ECU DIAGNOSIS >

[WITH 4WAS]

C

D

E

F

H

I

J

K

L

M

A

B

STC

N

O

P

CAUTION:

When using circuit tester to measure voltage for inspection, never extend forcibly any connector terminals.

Wiring Diagram — 4WAS SYSTEM —

INFOID:0000000000958917

Terminal No.

Wire 

color

Description

Condition

Value (Approx.)

+

-

Signal name

Input/

Output

1

G

4WAS front motor V 
terminal

2

Ground

W

Front wheel angle 
sensor W terminal 
voltage

Output

Ignition switch: ON

0 – 5 V

3

B

4WAS front lock so-
lenoid valve ground

4

Ground

Y

Front wheel angle 
sensor U terminal 
voltage

Output

Ignition switch: ON

0 – 5 V

5

BR

4WAS front motor U 
terminal

6

L

4WAS front motor W 
terminal

7

GR

Front wheel angle 
sensor ground

8

Ground

G/R

Front wheel angle 
sensor V terminal 
voltage

Output

Ignition switch: ON

0 – 5 V

10

Ground

R

4WAS front lock so-
lenoid valve power 
supply

Output

Ignition switch: ON

Battery voltage

Ignition switch: OFF
(Wait 10 min. or more.)

0 V

11

Ground

R

Power supply

Input

Ignition switch: ON

Battery voltage

Ignition switch: OFF

Battery voltage

12

Ground

B

4WAS front motor 
ground

Always

0  V

14

Y

4WAS communica-
tion-L

15

Ground

G

Ignition switch pow-
er supply

Input

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

18

Ground

B

Ground

Always

0 V

25

SB

4WAS communica-
tion-H

34

Ground

B

Ground

Always

0 V

 

 

 

 

 

 

 

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