Infiniti Q45. Manual — part 805
TROUBLE DIAGNOSIS FOR SYSTEM
SCS-37
C
D
F
G
H
I
J
K
L
M
A
B
SCS
Vertical G Sensor (VERTI G SENSOR)
NES000CB
●
Check the following if “VERTI G SENSOR” is detected in self-diagnosis results with CONSULT-II or “flick-
ering pattern for 22 or 23” is detected in self-diagnosis results without CONSULT-II.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Data are reference value.
ACTIVE DAMPER SUSPENSION CONTROL UNIT TERMINALS AND REFERENCE VALUE
Data are reference value and are measured between each terminal and ground.
CAUTION:
When using a circuit tester to measure voltage for inspection, be sure not to extend forcibly any connector terminals.
DIAGNOSTIC PROCEDURE
NOTE:
The front vertical G sensor is installed on the rear of the inner pillar and the rear vertical G sensor is located on
the rear of the outer wheelhouse. To check each vertical G sensor output signal, remove the vertical G sensor,
set it vertical, then measure voltage between terminals.
Be careful not to drop or bump the vertical G sensor as it is easy to break. If dropped or bumped, replace with
a new one.
Monitored item
Content
Condition
Display value
VERTI G SE FL [G]
Upper/lower acceleration
condition of vehicle
(front)
Vehicle stopped
Approx. 0.00G
Vehicle running
D1.67 - U1.67G
VERTI G SE RR [G]
Upper/lower acceleration
condition of vehicle
(rear)
Vehicle stopped
Approx. 0.00G
Vehicle running
D1.67 - U1.67G
Terminal
Wire
color
Item
Condition
Data (Approx.)
3
W
Front and rear vertical G sen-
sor 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 sen-
sor ground
Vehicle speed: 25 km/h (16 MPH) or more
0 V
SCS-38
TROUBLE DIAGNOSIS FOR SYSTEM
1.
CHECK VEHICLE VERTICAL G SENSOR
With CONSULT-II
1.
Start engine.
2.
Select “DATA MONITOR” mode for “ACT D/SUS” with CONSULT-II.
3.
Read out the value of “VERTI G SE FL” and “VERTI G SE RR”.
Without CONSULT-II
1.
Start engine.
2.
Check signal between active damper suspension control unit
harness connector (A) terminals and ground.
OK or NG
OK >> GO
TO
5.
NG
>> GO TO 2.
Monitored item
Condition
Display value
VERTI G SE FL
Vehicle stopped
Approx. 0.00G
Vehicle running
D1.67 - U1.67G
VERTI G SE RR
Vehicle stopped
Approx. 0.00G
Vehicle running
D1.67 - U1.67G
SEIA0708E
Connector
Terminal
Condition
Data (Approx.)
B37
3 -
Ground
Ignition switch: ON
5 V
Ignition switch: OFF
0 V
4 -
Ground
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
2.5 V
Vehicle running
Repeats 0 - 5 V
5 -
Ground
Vehicle speed: 0 km/h (0 MPH)
(Engine is running)
2.5 V
Vehicle running
Repeats 0 - 5 V
7 -
Ground
Vehicle speed: 25 km/h (16 MPH)
or more
0 V
SEIA0709E
TROUBLE DIAGNOSIS FOR SYSTEM
SCS-39
C
D
F
G
H
I
J
K
L
M
A
B
SCS
2.
CHECK HARNESS BETWEEN ACTIVE DAMPER SUSPENSION CONTROL UNIT AND FRONT VER-
TICAL G SENSOR
1.
Turn ignition switch “OFF”.
2.
Disconnect active damper suspension control unit harness connector and the front vertical G sensor har-
ness connector.
3.
Check continuity between the following terminals.
–
Active damper suspension control unit harness connector (A)
B37 terminal 3 and front vertical G sensor harness connector (B)
B3 terminal 1.
–
Active damper suspension control unit harness connector (A)
B37 terminal 4 and front vertical G sensor harness connector (B)
B3 terminal 2.
–
Active damper suspension control unit harness connector (A)
B37 terminal 7 and front vertical G sensor harness connector (B)
B3 terminal 3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
CHECK HARNESS BETWEEN ACTIVE DAMPER SUSPENSION CONTROL UNIT AND REAR VERTI-
CAL G SENSOR
1.
Turn ignition switch “OFF”.
2.
Disconnect active damper suspension control unit harness connector and the rear vertical G sensor har-
ness connector.
3.
Check continuity between the following terminals.
–
Active damper suspension control unit harness connector (A)
B37 terminal 3 and rear vertical G sensor harness connector (B)
B227 terminal 1.
–
Active damper suspension control unit harness connector (A)
B37 terminal 5 and rear vertical G sensor harness connector (B)
B227 terminal 2.
–
Active damper suspension control unit harness connector (A)
B37 terminal 7 and rear vertical G sensor harness connector (B)
B227 terminal 3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace damaged parts.
Continuity should exist.
SEIA0710E
Continuity should exist.
SEIA0711E
SCS-40
TROUBLE DIAGNOSIS FOR SYSTEM
4.
CHECK VERTICAL G SENSOR
1.
Turn ignition switch “OFF”.
2.
Disconnect front vertical G sensor harness connector and rear vertical G sensor harness connector.
3.
Remove front vertical G sensor and rear vertical G sensor. Refer to
SCS-61, "Removal and Installation"
4.
Apply 5 V (B) direct current between each vertical G sensor con-
nector (A) terminals 1 (positive) and 3 (negative).
5.
Check voltage between each vertical G sensor connector (A)
terminals 2 and 3.
OK or NG
OK
>> GO TO 5.
NG
>> Replace front vertical G sensor or rear vertical G sensor.
Refer to
SCS-61, "Removal and Installation"
5.
CHECK ACTIVE DAMPER SUSPENSION CONTROL UNIT
Check active damper suspension control unit input/output signal. Refer to
SCS-20, "Active Damper Suspen-
sion Control Unit Input/Output Signal Reference Values"
OK or NG
OK
>> GO TO 6.
NG
>> Check active damper suspension control unit pin terminals for damage or loose connection with
harness connector. If any items are damaged, repair or replace damaged parts.
6.
CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK
>> INSPECTION END
NG
>> Replace active damper suspension control unit. Refer to
SCS-60, "Removal and Installation"
Terminal
Condition
Voltage (Approx.)
2 (positive) -
3 (negative)
Vertical G sensor stop condition
2.5 V
Vertical G sensor lift up/down condition
Repeats 0 - 5 V
SEIA0712E
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