2011 INFINITI QX56 Factory Service Manual

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Page 1025 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-60
< DTC/CIRCUIT DIAGNOSIS >[ADAS CONTROL UNIT]
U1010 CONTROL UNIT (CAN)
U1010 CONTROL UNIT (CAN)
DescriptionINFOID:0000000006223488
CAN controller controls the communication of CA
N communicatio

Page 1026 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
U150F AV CAN 3DAS-61
< DTC/CIRCUIT DIAGNOSIS > [ADAS CONTROL UNIT]
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U150F AV CAN 3
DTC LogicINFOID:0000000006228052
DTC DETECTION LOGIC
NOTE:
If DTC “U150F” is de

Page 1027 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-62
< DTC/CIRCUIT DIAGNOSIS >[ADAS CONTROL UNIT]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis ProcedureINFOID:0000000006223493
1.CHECK ADAS CONTROL UNIT POWER SUPPLY C

Page 1028 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
ADAS CONTROL UNITDAS-63
< REMOVAL AND INSTALLATION > [ADAS CONTROL UNIT]
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REMOVAL AND INSTALLATION
ADAS CONTROL UNIT
Removal and InstallationINFOID:0000000006223494
R

Page 1029 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-64
< PRECAUTION >[DCA]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223495
The Supplemental Res

DAS-64
< PRECAUTION >[DCA]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223495
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precautions For Harness RepairINFOID:0000000006223496
ITS communication uses a twisted pair line. Be careful when repairing it.
Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
Revision: 2010 May2011 QX56

Page 1030 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
PRECAUTIONSDAS-65
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Bypass connection is never allowed at the repaired area. NOTE:
Bypass connection may cause ITS communication error. The
spli

Page 1031 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS-66
< SYSTEM DESCRIPTION >[DCA]
COMPONENT PARTS
SYSTEM DESCRIPTION
COMPONENT PARTS
Component Parts LocationINFOID:0000000006223498
1. ICC steering switch 2. Information display, ICC system
warnin

Page 1032 of 5598

INFINITI QX56 2011 Factory Service Manual
DAS
COMPONENT PARTSDAS-67
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Component DescriptionINFOID:0000000006223499
Component Description
ADAS control unit ADAS control unit calculate

DAS
COMPONENT PARTSDAS-67
< SYSTEM DESCRIPTION > [DCA]
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Component DescriptionINFOID: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 actu ator 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 operat ion 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
Revision: 2010 May2011 QX56

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