Infiniti Q45. Manual - part 801

TROUBLE DIAGNOSIS

SCS-21

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Specifications Between Active Damper Suspension Control Unit Terminals

ACTIVE DAMPER SUSPENSION CONTROL UNIT CONNECTOR LAYOUT

Data are reference value and are measured between each terminal and ground.

SGIA1399E

Terminal

Wire 

color

Item

Condition

Data (Approx.)

1

L/R

Steering angle sensor 1

Steering wheel turned slowly

Repeats 0 - 5 V

Steering wheel stopped

0 V

2

Y/B

Steering angle sensor 2

Steering wheel turned slowly

Repeats 0 - 5 V

Steering wheel stopped

0 V

3

W

Front and rear vertical G sensor 
power supply

Ignition switch: ON

5 V

Ignition switch: OFF

0 V

4

R/G

Front vertical G sensor

Vehicle speed: 0 km/h (0 MPH)
(Engine is running)

2.5 V

Vehicle running

Repeats 0 - 5 V

5

W/L

Rear vertical G sensor

Vehicle speed: 0 km/h (0 MPH)
(Engine is running)

2.5 V

Vehicle running

Repeats 0 - 5 V

7

R/Y

Front and rear vertical G sensor 
ground

Vehicle speed: 25 km/h (16 MPH) or 
more

0 V

8

B

Ground

Always

0 V

9

R

Front shock absorber actuator RH 
(A)

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

10

GY

Power supply

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

11

L/B

Stop lamp switch

Brake pedal: Depressed

Battery voltage

Brake pedal: Released

0 V

12

W/G

Engine speed

Engine speed: At idle
(Warm-up condition)

Engine speed: Approx. 2,000 rpm
(Warm-up condition)

PBIA3654J

PBIA3655J

SCS-22

TROUBLE DIAGNOSIS

13

P/B

Active damper suspension select 
switch

Engine running

Active damper sus-
pension select 
switch: AUTO

0 V

Active damper sus-
pension select 
switch: SPORT

5 V

14

BR/Y

Data link connector (RX)

—

—

15

P

Data link connector (TX)

—

—

16

G/B

SPORT indicator lamp

SPORT indicator lamp: ON

0 V

SPORT indicator lamp: OFF

Battery voltage

19

Y/G

Power supply
(Memory back-up)

Ignition switch: ON

Battery voltage

Ignition switch: OFF

20

G/R

Steering angle sensor
(neutral)

Engine running

Straight-ahead

5 V

Steering wheel 
turned

0 V

22

PU/W

Vehicle speed

Vehicle speed: 40 km/h (25 MPH)

23

B

Ground

Always

0 V

24

B

Ground

Always

0 V

25

BR

Front shock absorber actuator LH 
(A)

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

26

LG

Front shock absorber actuator LH 
(B')

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

27

R/B

Rear shock absorber actuator RH 
(B)

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

28

L/R

Rear shock absorber actuator LH 
(A')

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

29

PU

Rear shock absorber actuator LH 
(B)

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

30

Y/B

Rear shock absorber actuator LH 
(B')

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

31

GY

Power supply

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

32

GY

Power supply

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

34

R/W

Front shock absorber actuator LH 
(A')

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

35

SB

Rear shock absorber actuator RH 
(A)

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

36

B/W

Rear shock absorber actuator RH 
(B')

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

37

B/P

Rear shock absorber actuator LH 
(A)

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

38

L

Front shock absorber actuator RH 
(B)

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

Terminal

Wire 

color

Item

Condition

Data (Approx.)

SEIA0775E

TROUBLE DIAGNOSIS

SCS-23

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SCS

CAUTION:

When using circuit tester or oscilloscope to measure voltage for inspection, be sure not to extend forcibly any connector ter-
minals.

CONSULT-II Function (ACT D/SUS)

NES000AR

FUNCTION

CONSULT-II can display each diagnostic item using the diagnostic test modes shown following.

CONSULT-II SETTING PROCEDURE

Refer to 

GI-36, "CONSULT-II Start Procedure"

 .

39

OR

Front shock absorber actuator RH 
(A')

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

42

L/R

Front shock absorber actuator 
power supply

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

43

G

Front shock absorber actuator RH 
(B')

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

44

L/W

Front shock absorber actuator LH 
(B)

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

45

G/Y

Rear shock absorber actuator RH 
(A')

Vehicle speed: 25 km/h (16 MPH) or 
more

Repeats 0 V - battery voltage

48

B/R

Rear shock absorber actuator 
power supply

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

Terminal

Wire 

color

Item

Condition

Data (Approx.)

Diagnostic test mode

Function

Reference 

page

Self-diagnostic results

●

Self-diagnostic results can be read and erased quickly.

SCS-24

Data monitor

●

Input/Output data in the active damper suspension control unit can be read.

SCS-25

Active test

●

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from 
the active damper suspension control unit and also shifts some parameters in a 
specified range.

SCS-26

ECU part number

●

Active damper suspension control unit part number can be read.

SCS-27

SCS-24

TROUBLE DIAGNOSIS

SELF-DIAG RESULT MODE
Operation Procedure

1.

Perform “CONSULT-II Start Procedure”. Refer to 

GI-36, "CONSULT-II Start Procedure"

 .

2.

With engine at idle, touch “SELF-DIAG RESULTS”.
Display shows malfunction experienced since the last erasing operation.

NOTE:
The details for “TIME” are as follows:

●

“0”: Error currently detected with active damper suspension control unit.

●

Except for “0”: Error detected in the past and memorized with active damper suspension control unit.
Detects frequency of driving after DTC occurs (frequency of turning ignition switch “ON/OFF”).

Display Item List

How to Erase Self-diagnostic Results

1.

Perform applicable inspection of malfunctioning item and then repair or replace.

2.

Start engine and select “SELF-DIAG RESULTS” mode for “ACT D/SUS” with CONSULT-II.

3.

Touch “ERASE” on CONSULT-II screen to erase DTC memory.

CAUTION:

If memory cannot be erased, perform applicable diagnosis.

Items 

(CONSULT-II screen terms)

Diagnostic item is detected when...

Check item

VEHICLE SPEED SEN

●

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

●

Input signal change abruptly while driving.

SCS-32, "Vehicle 
Speed Sensor 
(VEHICLE SPEED 
SEN)"

STEERING ANGLE SEN
[ANG SIGNAL]

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

SCS-34, "Steering 
Angle Sensor 
(STEERING 
ANGLE SEN)"

STEERING ANGLE SEN
[NEUT SIGNAL]

●

When driven straight ahead at least at 10 km/h (6 MPH) with no neutral signal.

●

When the steering wheel is turned by 360

°

 or more with no neutral signal.

●

When the steering wheel is turned by 50

°

 or more with neutral signal at all 

times.

SCS-34, "Steering 
Angle Sensor 
(STEERING 
ANGLE SEN)"

VERTI G SENSOR FL

Front vertical G sensor is malfunctioning, or signal line of front vertical G sensor is 
open or shorted.

SCS-37, "Vertical 
G Sensor (VERTI 
G SENSOR)"

VERTI G SENSOR RR

Rear vertical G sensor is malfunctioning, or signal line of rear vertical G sensor is 
open or shorted.

SCS-37, "Vertical 
G Sensor (VERTI 
G SENSOR)"