Infiniti M35/M45 Y50. Manual — part 326
PREPARATION
BRC-5
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
PREPARATION
PFP:00002
Special Service Tools
NFS000Q2
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service Tools
NFS000Q3
Tool number
(Kent-Moore No.)
Tool name
Description
ST30720000
(J-25405)
Drift
a: 77 mm (3.03 in) dia.
b: 55.5 mm (2.19 in) dia.
Installing rear sensor rotor
ST27863000
(
—
)
Drift
a: 74.5 mm (2.93 in) dia.
b: 62.5 mm (2.46 in) dia.
KV40104710
(
—
)
a: 76.3 mm (3.00 in) dia.
b: 67.9 mm (2.67 in) dia.
ZZA0701D
ZZA0832D
ZZA0832D
Tool name
Description
1. Flare nut crowfoot
a: 10 mm (0.39 in) / 12mm (0.47 in)
2. Torque wrench
Installing brake tube
S-NT360
BRC-6
[VDC/TCS/ABS]
ON-VEHICLE SERVICE
ON-VEHICLE SERVICE
PFP:00000
Adjustment of Steering Angle Sensor Neutral Position
NFS000Q4
In case of doing work that applies to the list below, make sure to adjust neutral position of steering angle sen-
sor before running vehicle.
×
: Required
–: Not required
CAUTION:
To adjust neutral position of steering angle sensor, make sure to use CONSULT-II.
(Adjustment cannot be done without CONSULT-II.)
1.
Stop vehicle with front wheels in straight-ahead position.
2.
Perform “CONSULT-II Starting Procedure”. Refer to
GI-38, "CONSULT-II Start Procedure"
3.
Turn ignition switch ON and touch the CONSULT-II screen in the order of “ABS”, “WORK SUPPORT” and
“ST ANG SEN ADJUSTMENT”.
4.
Touch “START”.
CAUTION:
Do not touch steering wheel while adjusting steering angle
sensor.
5.
After approximately 10 seconds, touch “END”. (After approxi-
mately 60 seconds, it ends automatically.)
6.
Turn ignition switch OFF, then turn it ON again.
CAUTION:
Be sure to perform above operation.
7.
Run vehicle with front wheels in straight-ahead position, then
stop.
8.
Select “DATA MONITOR”, “ECU INPUT SIGNALS”, and “STR ANGLE SIG” on CONSULT-II screen. Then
make sure “STR ANGLE SIG” is within 0
±
2.5
°
. If value is more than specification, repeat steps 1 to 7.
9.
Erase memory of ABS actuator and electric unit (control unit) and ECM. ABS actuator and electric unit
(control unit): Refer to
. ECM: Refer to
(VQ35DE),
(VK45DE).
10. Turn ignition switch OFF.
Situation
Adjustment of Steering Angle Sensor Neutral Position
Removing/Installing ABS actuator and electric unit (control unit)
−
Replacing ABS actuator and electric unit (control unit)
×
Removing/Installing steering angle sensor
×
Removing/Installing steering components
×
Removing/Installing suspension components
×
Change tires to new ones
–
Tire rotation
–
Adjusting wheel alignment
×
SFIA0793E
SYSTEM DESCRIPTION
BRC-7
[VDC/TCS/ABS]
C
D
E
G
H
I
J
K
L
M
A
B
BRC
SYSTEM DESCRIPTION
PFP:00000
System Diagram
NFS000Q5
Functions
NFS000Q6
ABS
●
Anti-Lock Brake System is a function that detects wheel revolution while braking, electronically controls
braking force, and prevents wheel locking during sudden braking. It improves handling stability and
maneuverability for avoiding obstacles.
●
Electrical system diagnosis by CONSULT-II is available.
EBD
●
Electronic Brake force Distribution is a following function. ABS actuator and electric unit (control unit)
detects subtle slippages between the front and rear wheels during braking. Then it electronically controls
the rear braking force (brake fluid pressure) to reducing and reduces rear wheel slippage. Accordingly it
improves vehicle stability.
●
Electrical system diagnosis by CONSULT-II is available.
1.
Electric line
2.
Brake hydraulic line
3.
ECM
4.
TCM
5.
Steering angle sensor
6.
Warning lamp, indicator lamp
(combination meter)
7.
AWD control unit
(AWD models)
8.
ICC sensor integrated unit
(with ICC)
9.
RAS control unit
(with RAS)
10. Injector operation signal
11.
CAN communication
12. Front RH wheel sensor
13. Front LH wheel sensor
14. Master cylinder
15. ABS actuator and electric unit (con-
trol unit)
16. VDC OFF switch
17. Yaw rate/side G sensor
18. Rear RH wheel sensor
19. Rear LH wheel sensor
SFIA2722J
BRC-8
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
TCS
●
Traction Control System is a function that electronically controls engine torque, brake fluid pressure and
A/T gear position to ensure the optimum slippage ratio at drive wheels by computing wheel speed signals
from 4 wheel sensors. When ABS actuator and electric unit (control unit) detects a spin at drive wheels
(rear wheels), it compares wheel speed signals from all 4 wheels. At this time, LH and RH rear brake fluid
pressure are controlled, while fuel being cut to engine and throttle valve being closed to reduce engine
torque by the control unit. Further more, throttle position is continuously controlled to ensure the optimum
engine torque at all times.
●
During TCS operation, it informs driver of system operation by flashing SLIP indicator lamp.
●
Electrical system diagnosis by CONSULT-II is available.
VDC
●
Vehicle Dynamics Control system detects driver's steering operation amount and brake pedal travel from
steering angle sensor and pressure sensor. Using information from yaw rate/side G sensor and wheel
sensor, VDC judges driving condition (conditions of under steer and over steer) to improve vehicle driving
stability by controlling brake application to 4 wheels and engine output.
●
During VDC operation, it informs driver of system operation by flashing SLIP indicator lamp.
●
Electrical system diagnosis by CONSULT-II is available.
ECD
Receives deceleration degree commandment value signal from ICC sensor integrated unit, and controls brake
fluid pressure with the motor [built-in ABS actuator and electric unit (control unit)].
Operation That Is Not "System Error"
NFS000Q7
ABS
●
When starting engine or just after starting vehicle, brake pedal may vibrate or the motor operating sound
may be heard from engine room. This is a normal states of the operation check.
●
During ABS operation, brake pedal lightly vibrates and a mechanical sound may be heard. This is normal.
●
Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.
TCS
●
Depending on road circumstances, driver may have a sluggish feel. This is normal, because optimum
traction has highest priority under TCS operation.
●
When vehicle is passing through a road where surface friction varies, downshifting or depressing acceler-
ator pedal fully may activate TCS temporarily.
VDC
●
During VDC operation, body and brake pedal lightly vibrate and mechanical sounds may be heard. This is
normal.
●
If vehicle is rotated on turn table, or rolled and rocked on ship, ABS warning lamp, VDC OFF indicator
lamp, and SLIP indicator lamp may turn on. In this case, start engine on normal road again. If ABS warn-
ing lamp, VDC OFF indicator lamp, and SLIP indicator lamp turn off after restart, it is normal.
●
When starting TCS or VDC under rapid acceleration or hard turn, operating sound by brake pedal is gen-
erated. However, this is not malfunction. This is because TCS and VDC are functioning normally.
●
VDC may not operate normally or ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp
may turn on when driving special roads with extremely steep slant (banks on circuit road and so on.) How-
ever, it is not malfunction when returning to a normal state after restarting the engine. In that case, be sure
to erase the memory of self-diagnosis. Refer to
●
Yaw rate /side G sensor malfunction may occur under hard turn like spin turn, rapid acceleration turn, drift
run, etc., when VDC function is OFF (VDC OFF switch is turned on). It is not malfunction if it is possible to
return to a normal position after restarting engine. Then erase the memory of self-diagnosis. Refer to
●
VDC OFF indicator lamp and SLIP indicator lamp may simultaneously turn on when low tire pressure
warning lamp turns on. This is not a VDC system error but results from characteristic change of tires.
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