Infiniti QX56 (Z62). Manual — part 257
DAS
PRECAUTIONS
DAS-65
< PRECAUTION >
[DCA]
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A
• Bypass connection is never allowed at the repaired area.
NOTE:
Bypass connection may cause ITS communication error. The
spliced wire becomes separated and the characteristics of twisted
line are lost.
DCA System Service
INFOID:0000000006223497
CAUTION:
• Never look straight into the laser beam discharger when adjusting laser beam aiming.
• Turn the MAIN switch OFF in conditions similar to driving, such as free rollers or a chassis dyna-
mometer.
• Never use the ICC sensor removed from vehicle. Never disassemble or remodel.
• Erase DTC when replacing parts of DCA system, then check the operation of DCA system after
adjusting laser beam aiming if necessary.
SKIB8767E
DAS-66
< SYSTEM DESCRIPTION >
[DCA]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts Location
INFOID:0000000006223498
1.
ICC steering switch
2.
Information display, ICC system
warning lamp, buzzer
(On the combination meter)
3.
AV control unit
Refer to
4.
Transfer control unit
Refer to
5.
ICC brake hold relay
6.
7.
ICC sensor
8.
TCM
Refer to
SYSTEM : Component Parts Loca-
tion"
9.
ABS actuator and electric unit (con-
trol unit)
Refer to
10. Accelerator pedal actuator
11.
Stop lamp switch
12. ICC brake switch
13. Steering angle sensor
14. ADAS control unit
Refer to
A.
Back side of engine room (RH)
B.
Front bumper (center)
C.
Upper side of brake pedal
JSOIA0364ZZ
DAS
COMPONENT PARTS
DAS-67
< SYSTEM DESCRIPTION >
[DCA]
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Component Description
INFOID:0000000006223499
Component
Description
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 a brake fluid pres-
sure control signal to ABS actuator and electric unit (control unit) via CAN communica-
tion
• ADAS control unit transmits the buzzer output signal to the combination meter via CAN
communication
• ADAS control unit transmits an accelerator pedal feedback force control signal to the
accelerator pedal actuator via ITS communication
ICC sensor
• ICC sensor detects light reflected from a vehicle ahead by irradiating laser forward and
calculates a distance from the vehicle ahead and a relative speed, based on the detect-
ed 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 signal, etc. to ADAS control unit via CAN communica-
tion
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 con-
trol unit via CAN communication
• ABS actuator and electric unit (control unit) controls the brake, based on a brake fluid
pressure control signal received from ADAS control unit via CAN communication
TCM
TCM transmits the signal related to A/T control to ADAS control unit via CAN communi-
cation
Combination meter
Performs the following operations using the signals received from the ADAS control unit
via the CAN communication
• Displays the DCA system operation status using the meter display signal
• Illuminates the ICC system warning lamp using the ICC warning lamp signal
• Operates the buzzer (ICC warning chime) using the buzzer output signal
Dynamic driver assistance switch
(On the ICC steering switch)
ECM receives an ICC steering switch (dynamic driver assistance switch) signal and trans-
mits the signal to ADAS control unit via CAN communication
ICC brake hold relay
ICC brake hold relay activates the stop lamp by ICC brake hold relay drive signal (stop
lamp drive signal) outputted by the ADAS control unit
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 communication
• 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
Transfer control unit
Transfer control unit transmits a mode selection state of 4WD shift switch to the ADAS
control unit via CAN communication
AV control unit
AV control unit transmits the system selection signal to the ADAS control unit via CAN
communication
Steering angle sensor
Measures the rotation amount, rotation speed, and rotation direction of steering wheel,
and then transmits them to ADAS control unit via CAN communication
Accelerator pedal actuator
Accelerator pedal actuator receives an accelerator pedal feedback force control signal
from the ADAS control unit via ITS communication and pushes back the accelerator pedal
DAS-68
< SYSTEM DESCRIPTION >
[DCA]
SYSTEM
SYSTEM
System Description
INFOID:0000000006223500
SYSTEM DIAGRAM
ADAS CONTROL UNIT INPUT/OUTPUT SIGNAL ITEM
Input Signal Item
JSOIA0273GB
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