Infiniti F50. Manual - part 749

TROUBLE DIAGNOSIS FOR ACTIVE DAMPER SUSPENSION

SCS-13

C

D

F

G

H

I

J

K

L

M

A

B

SCS

TEWM0026E

SCS-14

TROUBLE DIAGNOSIS FOR ACTIVE DAMPER SUSPENSION

CONTROL UNIT INPUT/OUTPUT SIGNAL STANDARD
Reference Values 

SEIA0273E

Terminal number

 Inspection location

Reference value

+

-

1,2

Ground

Steering angle sensor

When steering wheel turned slowly

Repeats Approx. 0 - 5V

3

G sensor power supply

Approx. 5V

4,6

G sensor

When stopped

Approx. 5V

7

G sensor ground

—

8,23,24

Ground

—

9,25,26

27,28,29
30,34,35
36,37,38
39,43,44

45

Shock absorber
actuator

—

10,19,31

32

Power supply

 Ignition switch is ON

Battery voltage

11

Stop lamp switch

When brake pedal not depressed

Approx. 0V

When brake pedal depressed

Battery voltage

12

ECM

—

13

Select switch

Sport

Approx. 5V

Auto

Approx. 0V

14,15

-

CONSULT-II

—

16

Ground

Indicator lamp (SPORT)

Sport

Approx. 0V

Auto

Battery voltage

20

Steering angle sensor

Neutral position

Approx. 5V

21

EPS solenoid valve

0 km/h (0 MPH) (engine idling)

Approx. 1.05 A

100 km/h (62MPH)

Approx. 0.7 A

22

Vehicle speed sensor

—

42,48

Actuator

Battery voltage

TROUBLE DIAGNOSIS FOR ACTIVE DAMPER SUSPENSION

SCS-15

C

D

F

G

H

I

J

K

L

M

A

B

SCS

CONSULT-II Inspection Procedure

EES000BL

The troubleshooting system provides four functional modes - self diagnosis, data monitor, active test and con-
trol unit part number display modes.

SELF-DIAGNOSIS PROCEDURE

1.

Connect CONSULT-II to data link connector and start the engine.

2.

Touch “START”, “ACT D/SUS” and “SELF-DIAG RESULTS”.

a.

When a malfunction item is displayed, record the item.

b.

Touch “ERASE”.

3.

A self-diagnostic result is displayed again.
If “NO SELF DIAGNOSTIC FAILURE INDICATED” is displayed,
check the item first shown on the display.

Items Shown on Display 

Mode type

Description

Mode selection

Display representation

SELF-DIAG RESULTS

Self-diagnosis

The desired functional 
mode can easily be 
selected by touching key 
on CONSULT-II.

The desired functional 
mode can easily be 
shown on the CONSULT-
II display.

DATA MONITOR

●

Helps locate main trouble cause according to 
a self-diagnostic result.

●

Provides active damper suspension control 
unit input and output monitoring and print-out 
function (observation and recording).

ACTIVE TEST

●

Used to precisely locate the main cause for 
trouble according to the self-diagnostic result 
obtained in the monitor mode.

●

Provides operational checks of indicator light 
and actuator circuits.

ECU PART NUMBER

Active damper control unit part numbers are 
shown on the CONSULT-II display.

PBIB0196E

Malfunctioning system or circuit

Detecting conditions

VEHICLE SPEED SEN

●

Input signal does not change for some length of time while driving.

●

Input signal changes abruptly while driving.

VERTI G SENSOR F

●

Voltage is greater than or less than the standard value.

VERTI G SENSOR R/R

VERTI G SENSOR R/L

STEERING ANGLE SEN
[ANG SIGNAL] (.a)

Input signal does not change for some length of time while driving at speeds greater 
than 60 km/h (37 MPH).

STEERING ANGLE SEN
[NEUT SIGNAL] (.b)

●

Neutral (“ON”) signal is not entered at all while driving a distance of more than 10 km 
(6 miles).

●

Neutral (“ON”) signal is not entered at all when steering wheel is turned at least 360

°

.

●

Neutral (“ON”) signal is entered when steering wheel is turned at least 50

°

.

SCS-16

TROUBLE DIAGNOSIS FOR ACTIVE DAMPER SUSPENSION

DATA MONITOR PROCEDURE

1.

Connect CONSULT-II to data link connector, then start the
engine.

2.

Touch “START”, “ACT D/SUS” and “DATA MONITOR”.

3.

Select the signal to be monitored.

a.

When “ALL SIGNALS” is selected, touch “START”.

b.

When “SELECTION FROM MENU” is to be selected, touch
“SETTING”. “MONITOR ITEM MENU” will then be indicated on
the display. Touch the item to be monitored, then “ENTER” and
“START”.

c.

Print out the data if necessary.

DATA MONITOR MODE

PBIB0196E

Monitored item

Display

Data item selection

Remarks

Main item

Item menu 

selection

Vehicle speed sensor

VHCL SPEED SE
[km/h] or [mph]

×

×

—

Vertical G sensor front

VERTI G SE F [G]

×

×

—

Vertical G sensor rear right side

VERTI G SE RR [G]

×

×

—

Vertical G sensor rear left side

VERTI G SE RL [G]

×

×

—

Steering angle sensor (steering 
angle signal)

STEERING ANG [

°

]

×

×

When the battery is disconnected 
and then reconnected, an abnormal 
value is displayed until the straight 
ahead position (0

°

) is set during 

driving.

Active damper select switch 

SELECT SWITCH [AUTO-
SPORT]

×

×

—

Stop lamp switch

STOP LAMP SW [ON-OFF]

×

×

—

Steering angle sensor (steering 
neutral signal)

NEUTRAL SIG [ON-OFF]

×

×

—

Damper motor front right

DAMP MTR F/R [Step]

×

×

—

Damper motor front left

DAMP MTR F/L [Step]

×

×

—

Damper motor rear right

DAMP MTR R/R [Step]

×

×

—

Damper motor rear left

DAMP MTR R/L [Step]

×

×

—

Power steering solenoid valve

POWER STR SOL [A]

×

×

EPS solenoid control current flow 
from control unit

Active damper indicator lamp
(SPORT)

INDICATOR [ON-OFF]

×

×

—

Voltage

■

 VOLTAGE [V]

—

×

Voltage measured by the voltage 
probe

Pulse

■

 PULSE [msec] or [Hz] or [%]

—

×

Pulse width, frequency or duty cycle 
measured by the pulse probe. Only 
“#” is displayed if item is unable to 
be measured.
Figures with “#” s are temporary 
ones. They are the same figures as 
an actual piece and data which was 
just previously measured.