Infiniti QX56 (Z62). Manual - part 164

 

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Infiniti QX56 (Z62). Manual - part 164

 

 

PRECAUTIONS

BRC-141

< PRECAUTION >

[BRAKE ASSIST (WITH PREVIEW FUNCTION)]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

PRECAUTION

PRECAUTIONS

Precautions for Preview Function Service

INFOID:0000000006228290

CAUTION:

• Never look straight into the laser beam discharger when adjusting laser beam aiming.
• Never use the ICC sensor removed from vehicle. Never disassemble or remodel.
• Erase DTC when replacing parts of ICC system. Then check the operation of ICC system after adjust-

ing laser beam aiming if necessary.

BRC-142

< SYSTEM DESCRIPTION >

[BRAKE ASSIST (WITH PREVIEW FUNCTION)]

COMPONENT PARTS

SYSTEM DESCRIPTION

COMPONENT PARTS

Component Parts Location

INFOID:0000000006248456

1.

ICC steering switch

2.

Information display, ICC system 
warning lamp, IBA OFF indicator 
lamp, buzzer
(On the combination meter)

3.

BCM
Refer to 

BCS-4, "BODY CONTROL 

SYSTEM : Component Parts Loca-
tion"

4.

Transfer control unit
Refer to 

DLN-10, "Component Parts 

Location"

5.

ICC brake hold relay

6.

ECM
Refer to 

EC-16, "Component Parts 

Location"

7.

ICC sensor

8.

TCM
Refer to 

TM-10, "A/T CONTROL 

SYSTEM : Component Parts Loca-
tion"

9.

ABS actuator and electric unit (con-
trol unit)
Refer to 

BRC-10, "Component Parts 

Location"

10. Stop lamp switch

11.

ICC brake switch

12. IBA OFF switch

JSOIA0362ZZ

COMPONENT PARTS

BRC-143

< SYSTEM DESCRIPTION >

[BRAKE ASSIST (WITH PREVIEW FUNCTION)]

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Component Description

INFOID:0000000006248457

×

: Applicable

13. Steering angle sensor

Refer to 

BRC-10, "Component Parts 

Location"

14. ADAS control unit

Refer to 

DAS-13, "Component Parts 

Location"

A.

Back side of engine room (RH)

B.

Front bumper (center)

C.

Upper side of brake pedal

D.

Under side of instrument lower driver 
panel

Component

Function

Description

V

e

h

ic

le

-to-v

eh

ic

le

 di

st

a

n

c

e

 co

ntro

l m

o

de

Co

nv

en

ti

o

n

a

(f

ixe

d

 sp

ee

d) c

rui

se

 co

nt

rol

 mo

de

In

te

lli

ge

nt Brak

e Ass

is

(IB

A

)

Brak

Ass

is

t (wi

th p

rev

ie

w fu

nc

tio

n

)

ADAS control unit

×

×

×

×

• ADAS control unit calculates a target distance between vehicles 

and a target speed, based on signals received from each sensor 
and switch to transmit an engine torque command value to ECM 
and a brake fluid pressure control signal to ABS actuator and 
electric unit (control unit) via CAN communication

• ADAS control unit transmits buzzer output signal to combination 

meter via CAN communication

ICC sensor

×

×

×

×

• ICC sensor detects light reflected from a vehicle ahead by irra-

diating laser forward and calculates a distance from the vehicle 
ahead and a relative speed, based on the detected signal

• ICC sensor transmits the presence/absence of vehicle ahead 

and the distance from the vehicle to ADAS control unit via ITS 
communication

ECM

×

×

×

×

• ECM transmits the accelerator pedal position signal, ICC brake 

switch signal, stop lamp switch signal, ICC steering switch sig-
nal, etc. to ADAS control unit via CAN communication

• ECM controls the electric throttle control actuator based on the 

engine torque demand received from the ADAS control unit via 
CAN communication

ABS actuator and electric unit 
(control unit)

×

×

×

×

• ABS actuator and electric unit (control unit) transmits the vehicle 

speed signal (wheel speed), stop lamp signal and VDC/TCS/
ABS system operation condition to ADAS control unit via CAN 
communication

• ABS actuator and electric unit (control unit) controls the brake, 

based on a brake fluid pressure control signal received from the 
ADAS control unit via CAN communication

BCM

×

BCM transmits the front wiper request signal to ADAS control unit 
via CAN communication

TCM

×

×

TCM transmits the signal related to A/T control to ADAS control 
unit via CAN communication

BRC-144

< SYSTEM DESCRIPTION >

[BRAKE ASSIST (WITH PREVIEW FUNCTION)]

COMPONENT PARTS

NOTE:
Only IBA system uses

Combination meter

×

×

×

×

Performs the following operations using the signals received from 
the ADAS control unit via the CAN communication
• Displays the ICC system operation status using the meter dis-

play signal

• Illuminates the ICC system warning lamp using the ICC warning 

lamp signal

• Illuminates the IBA OFF indicator lamp using the IBA OFF indi-

cator lamp signal

• Operates the buzzer (ICC warning chime) using the buzzer out-

put signal

ICC steering switch

×

×

• ICC steering switch allows the ON/OFF of the Intelligent Cruise 

Control and the settings of a vehicle speed and distance be-
tween vehicles

• ICC steering switch signal is transmitted to ECM. ECM transmits 

the signal to the ADAS control unit via CAN communication

ICC brake switch

×

×

×

×

• ICC brake switch is turned OFF and stop lamp switch is turned 

ON, when depressing the brake pedal

• ICC brake switch signal is input to ECM. These signals are 

transmitted from ECM to ADAS control unit via CAN communi-
cation

• Stop lamp switch signal is input to ECM and ABS actuator and 

electric unit (control unit). These signals are transmitted from 
ECM and ABS actuator and electric unit (control unit) to ADAS 
control unit via CAN communication

Stop lamp switch

×

×

×

×

ICC brake hold relay

×

×

ICC brake hold relay activates the stop lamp by ICC brake hold re-
lay drive signal (stop lamp drive signal) outputted by the ADAS 
control unit

Transfer control unit

×

×

×

×

Transfer control unit transmits a mode selection state of 4WD shift 
switch to the ADAS control unit via CAN communication

IBA OFF switch

×

Note

IBA OFF switch signal is input to the ADAS control unit

Steering angle sensor

×

Measures the rotation amount, rotation speed, and rotation direc-
tion of steering wheel, and then transmits them to ADAS control 
unit via CAN communication

Component

Function

Description

V

e

h

ic

le-t

o

-v

eh

ic

le

 di

st

a

n

c

e

 co

nt

ro

l m

o

d

e

Co

nve

n

ti

on

al

 (f

ix

ed

 sp

ee

d) cru

is

e

 c

o

n

tro

m

o

d

e

Int

e

lligent Brake Assi

st 

(IBA)

Brak

e Ass

is

(wi

th p

rev

ie

w fu

nc

ti

o

n

)

 

 

 

 

 

 

 

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