Infiniti Q45. Manual - part 877

TROUBLE DIAGNOSIS

STC-11

[WITHOUT REAR ACTIVE STEER]

C

D

E

F

H

I

J

K

L

M

A

B

STC

TGWM0076E

STC-12

[WITHOUT REAR ACTIVE STEER]

TROUBLE DIAGNOSIS

Active Damper Suspension Control Unit Input/Output Signal Reference Values

NGS00064

ACTIVE DAMPER SUSPENSION CONTROL UNIT INSPECTION TABLE
Specifications with CONSULT-II

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.

Monitor item [Unit]

Content

Condition

Display value

VHCL SPEED SE [km/h] 
or [mph]

Wheel speed

Vehicle stopped

0 km/h (0 MPH)

Vehicle running

CAUTION:

Check air pressure of tire under standard condition.

Approximately equal 
to the indication on 
speedometer (Inside 
of 

±

10%)

POWER STR SOL [A]

Monitored value of cur-
rent at power steering 
solenoid valve

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

Approx. 1.10 A

Vehicle speed: 100 km/h (62 MPH)

Approx. 0.54 A

ENGINE SPEED [rpm]

Engine speed

Engine stopped

0 rpm

Engine running
(Engine speed: 400 rpm or more)

Approximately equal 
to the indication on 
tachometer

SGIA1399E

Terminal

Wire 

color

Item

Condition

Data (Approx.)

8

B

Ground

Always

0 V

10

GY

Power supply

Ignition switch: ON

Battery voltage

Ignition switch: OFF

0 V

12

W/G

Engine speed

Engine speed: At idle
(Warm-up condition)

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

14

BR/Y

Data link connector (RX)

—

—

15

P

Data link connector (TX)

—

—

PBIA3654J

PBIA3655J

TROUBLE DIAGNOSIS

STC-13

[WITHOUT REAR ACTIVE STEER]

C

D

E

F

H

I

J

K

L

M

A

B

STC

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)

NGS00065

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"

 .

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”).

19

Y/G

Power supply
(Memory back-up)

Ignition switch: ON

Battery voltage

Ignition switch: OFF

21

OR/L

Power steering solenoid valve

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

4.4 - 6.6 V

Vehicle speed: 100 km/h (62 MPH)

2.4 - 3.6 V

22

PU/W

Vehicle speed

Vehicle speed: 40 km/h (25 MPH)

CAUTION:

Check air pressure of tire under 
standard condition.

23

B

Ground

Always

0 V

24

B

Ground

Always

0 V

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

Terminal

Wire 

color

Item

Condition

Data (Approx.)

SEIA0775E

Diagnostic test mode

Function

Reference 

page

Self-diagnostic results

●

Self-diagnostic results can be read and erased quickly.

STC-13

Data monitor

●

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

STC-14

STC-14

[WITHOUT REAR ACTIVE STEER]

TROUBLE DIAGNOSIS

Display Item List

CAUTION:

Active damper suspension system shall be checked when having indications that are not included in the 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.

DATA MONITOR MODE
Operation Procedure

1.

Perform “CONSULT-II Start Procedure”. Refer to 

GI-36, "CONSULT-II Start Procedure"

 .

2.

Touch “DATA MONITOR”.

3.

Select from “SELECT MONITOR ITEM”, screen of data monitor mode is displayed.
NOTE:
When malfunction is detected, CONSULT-II performs REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed in real time.

Display Item List

Self-Diagnostic Procedure

NGS0006C

 SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)

Refer to 

STC-13, "SELF-DIAG RESULT MODE"

 .

 SELF-DIAGNOSTIC PROCEDURE (WITHOUT CONSULT-II)

Description

The SPORT indicator lamp in the combination meter will flicker according to the self-diagnostic results. As for
the details of the SPORT indicator lamp flickering patterns, refer to 

STC-15, "Diagnostic Procedure"

 .

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.

STC-19, "Vehicle 
Speed Sensor 
(VEHICLE SPEED 
SEN)"

Monitored item (Unit)

Remarks

VHCL SPEED SE [km/h] or [mph]

Vehicle speed calculated by combination meter.

POWER STR SOL [A]

Power steering solenoid controlling current that active damper suspension control unit outputs 
is displayed.

ENGINE SPEED [rpm]

Engine speed calculated by ECM.

Voltage [V]

The value measured by the voltage probe is displayed.

Frequency [Hz]

The value measured by the pulse probe is displayed.

DUTY-HI (high) [%]

DUTY-LOW (low) [%]

PLS WIDTH-HI [msec]

PLS WIDTH-LOW [msec]