2011 INFINITI QX56 wheel

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
St op la mp sw i tc h
××××
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 ×
NoteIBA 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
Vehicle-to-vehicle distance control mode
Conventional (fixed speed) cruise control mode Intelligent Brake Assist (IBA)
Brake Assist (with preview function)
Revision: 2010 May2011 QX56

BRC-150
< SYSTEM DESCRIPTION >[INTELLIGENT BRAKE ASSIST]
COMPONENT PARTS
Component Description
INFOID:0000000006248459
× : 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 inst rument lower driver
panel
Component Function
Description
Vehicle-to-vehicle distance control mode
Conventional (fixed speed) cruise control mode Intelligent Brake Assist (IBA)
Brake Assist (with preview function)
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 pres sure 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
Revision: 2010 May2011 QX56

COMPONENT PARTSBRC-151
< SYSTEM DESCRIPTION > [INTELLIGENT BRAKE ASSIST]
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BRC
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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 in put 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 ×
NoteIBA 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
Vehicle-to-vehicle distance control mode
Conventional (fixed speed) cruise control mode Intelligent Brake Assist (IBA)
Brake Assist (with preview function)
Revision: 2010 May2011 QX56

REPAIRING MATERIALBRM-7
< PREPARATION >
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BRM
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PREPARATION
REPAIRING MATERIAL
Foam RepairINFOID:0000000006248486
During factory body assembly, foam insulators are installed in certain body panels and locations around the
vehicle. Use the following procedure(s) to r eplace any factory-installed foam insulators.
URETHANE FOAM APPLICATIONS
Use commercially available Urethane foam for sealant (foam material) repair of material used on vehicle.
Read instructions on product for fill procedures.
Example of foaming agent filling operation procedure
1. Fill procedures after installation of service part.
a. Eliminate foam material remaining on vehicle side.
b. Clean area after eliminating form insulator and foam material.
c. Install service part.
d. Insert nozzle into hole near fill area and fill foam ma terial or fill enough to close gap with the service part.
2. Fill procedures before installation of service part.
a. Eliminate foam material remaining on vehicle side.
b. Clean area after eliminating foam insulator and foam material.
c. Fill foam material on wheelhouse outer side. 3M™
Automix™ Flexible Foam 08463 or equiva-
lent
1. Urethane foam
A. Nozzle insert hole
: Vehicle front
JSKIA0129GB
Revision: 2010 May2011 QX56

BRM-10
< PREPARATION >
BODY COMPONENT PARTS
NOTE:
 For the parts without a number described in the figure, it is supplied only with the assembly part that the part is included with.
 Tensile strength column shows the largest strength value of a part in the component part.
CAUTION:
If the high strength steel (ultra high strength steel) of this is broken, replace by assembly for the supply part. No. Parts name
Tensile strength
(MPa) Both sided anti-corrosive
precoated steel sections
1. Air box assembly Under 440 ×
2. Side dash (RH & LH) Under 440 ×
3. Lower dash a. T=2.0 mm
(0.079 in)
980
caution×
4. Trim mounting bracket assembly Under 440 —
5. Rear floor board reinforcement assembly Under 440 —
6. Jack mounting bracket Under 440 —
7. Rear floor rear Under 440 ×
8. 3rd seat front mounting bracket assembly Under 440 —
9. Rear floor reinforcement 440 —
10. Inner rear wheelhouse reinforcement (RH & LH) Under 440 ×
11. Rear floor front Under 440 ×
12. 2nd seat crossmember front reinforcement Under 440 ×
13. 2nd seat mounting member assembly 440 —
14. 2nd crossmember (RH & LH Upper) Under 440 —
15. Front seat mounting rear crossmember assembly 440 ×
16. Inner sill (RH & LH) T=1.4 mm
(0.055 in)
980
caution×
17. Front floor reinforcement 440 —
18. Front floor Under 440 ×
19. 2nd crossmember (RH & LH Lower) 440 ×
20. Hoodledge reinforcement (RH & LH) Under 440 ×
21. Hoodledge assembly (RH & LH) Refer to No.22 −24
22. Upper hoodledge (RH & LH) Under 440 ×
23. Lower hoodledge (RH & LH) Under 440 ×
24. Upper rear hoodledge (RH & LH) Under 440 ×
25. Side radiator core support (RH & LH) 440 ×
26. Upper radiator core support (RH & LH) Under 440 ×
27. Radiator core support main assembly 440 ×
28. Front side member assembly (RH & LH) 590 ×
29. 4th crossmember 590 ×
30. 2nd seat mounting crossmember b. T=2.0 mm
(0.079 in)
980
caution×
31. Rear side member (RH & LH) 590 ×
32. 3rd seat mounting bracket assembly Under 440 ×
33. 3rd rear crossmember assembly 590 ×
34. Rear crossmember 590 ×
35. Upper rear end crossmember assembly Under 440 ×
Revision: 2010 May2011 QX56

BRM-12
< PREPARATION >
BODY COMPONENT PARTS
NOTE:
 For the parts without a number described in the figure, it is supplied only with the assembly part that the part is included with.
 Tensile strength column shows the largest strength value of a part in the component part. No. Parts name
Tensile strength
(MPa) Both sided anti-corrosive
precoated steel sections
1. Hood Under 440×
2. Front fender (RH & LH) Under 440 ×
3. Inner side roof rail (RH & LH) 590 —
4. Upper inner front pillar (RH & LH) c. T=1.6 mm
(0.063 in)
980
caution—
5. Inner center pillar (RH & LH) d. T=1.6 mm
(0.063 in)
980
caution×
6. Center sill reinforcement assembly (RH & LH) Under 440 ×
7. Side body assembly (RH & LH) Refer to No.8 −13
8. Upper front pillar reinforcement (RH & LH) 590 —
9. Lower center pillar brace (RH & LH) e. T=1.8 mm
(0.071 in)
980
caution—
10. Front pillar brace (RH & LH) 590 —
11. Outer sill reinforcement (RH & LH) 590 ×
12. Outer front side body (RH & LH) Under 440 ×
13. Front fender bracket assembly (RH & LH) Under 440 ×
14. Outer sill (RH & LH) Under 440 ×
15. Front door assembly (RH & LH) 440 ×
16. Outer front door panel (RH & LH) Under 440 ×
17. Rear door assembly (RH & LH) 440 ×
18. Outer rear door panel (RH & LH) Under 440 ×
19. Back pillar reinforcement (RH & LH) Under 440 —
20. Inner back pillar (RH & LH) Under 440 —
21. Inner rear side roof rail (RH & LH) Under 440 —
22. Inner rear pillar (RH & LH) 590 —
23. Lower inner rear pillar (RH & LH)v Under 440 —
24. Side panel reinforcement (RH & LH) Under 440 —
25. Outer rear wheelhouse (RH & LH) Under 440 ×
26. Inner rear wheelhouse (RH & LH) Under 440 ×
27. Outer rear wheelhouse extension (RH & LH) Under 440 ×
28. Roof assembly Under 440 —
29. Front roof rail 440 —
30. Roof bow No.3 Under 440 —
31. Roof bow No.4 Under 440 —
32. Roof bow No.5 Under 440 —
33. Rear roof rail 440 —
34. Rear fender (RH & LH) Under 440 ×
35. Back pillar assembly (RH & LH) Under 440 —
36. Rear fender bracket (RH & LH) Under 440 —
37. Fuel filler lid Under 440 ×
38. Rear fender extension (RH & LH) Under 440 ×
39. Back door Under 440 ×
Revision: 2010 May2011 QX56

BRM-14
< PREPARATION >
BODY COMPONENT PARTS
NOTE:
 For the parts without a number described in the figure, it is supplied only with the assembly part that the part is included with.
 Tensile strength column shows the largest strength value of a part in the component part.
CAUTION:
If the high strength steel (ultra high strength steel) of this is broken, replace by assembly for the supply part. No. Parts name
Tensile strength
(MPa) Both sided anti-corrosive
precoated steel sections
1. Frame assembly Refer to No.2−36
2. Front bumper crossmember assembly T=1.8 mm
(0.071 in)
980
caution—
3. 2nd crossmember assembly 440 —
4. 2nd crossmember reinforcement (RH & LH) 440 —
5. 1st cab mounting bracket (RH & LH) Under 440 —
6. Front side member assembly (RH & LH) 540 —
7. Front suspension bracket assembly (RH & LH) Under 440 —
8. Engine mounting bracket assembly (RH & LH) Under 440 —
9. 2nd cab mounting bracket assembly (RH & LH) Under 440 —
10. 3way connector bracket assembly (RH & LH) Under 440 —
11. Piping bracket assembly (RH & LH) Under 440 —
12. Front bound bumper bracket assembly (RH & LH) 540 —
13. Lower front link mounting bracket assembly (RH & LH) 440 —
14. Diagonal member complete (RH & LH) 540 —
15. Rear engine mounting gusset assembly Under 440 —
16. Rear engine mounting member complete Under 440 —
17. Front fuel tank protector (RH & LH) Under 440 —
18. 3rd cab mounting bracket assembly (RH & LH) Under 440 —
19. Center side member assembly (RH & LH) 540 —
20. 6th crossmember assembly Under 440 —
21. Exhaust bracket (Front) Under 440 —
22. Fuel tank protector (RH & LH Rear) Under 440 —
23. Heat insulator bracket Under 440 —
24. Fuel tank protector assembly (RH & LH) 540 —
25. Rear suspension mounting bracket assembly (RH & LH) 540 —
26. 4th cab body mounting bracket assembly (RH & LH) Under 440 —
27. Rear brake hose bracket (RH & LH) Under 440 —
28. Rear shock absorber bracket assembly (RH & LH) 540 —
29. Rear side member assembly (RH & LH) 540 —
30. 5th cab body bracket (RH & LH) Under 440 —
31. 7th crossmember assembly Under 440 —
32. Exhaust bracket (Rear) Under 440 —
33. Spare wheel crossmember assembly Under 440 —
34. Front under cover bracket assembly Under 440 —
35. Rear end gusset (RH & LH) 440 —
36. Rear end crossmember assembly 540 —
Revision: 2010 May2011 QX56

BRM-16
< REMOVAL AND INSTALLATION >
CORROSION PROTECTION
Undercoating
INFOID:0000000006248492
The underside of the floor and wheelhouse are undercoated to prevent rust, vibration, noise and stone chip-
ping. Therefore, when such a panel is replaced or re paired, apply undercoating to that part. Use an undercoat-
ing which is rust resistant, soundproof, vibr ation-proof, shock-resistant, adhesive, and durable.
Precautions in Undercoating
1. Never apply undercoating to any place unless specif ied (such as the areas above the muffler and three
way catalyst that are subjected to heat).
2. Never undercoat the exhaust pipe or other parts that become hot.
3. Never undercoat rotating parts.
4. Apply bitumen wax after applying undercoating.
5. After putting seal on the vehicle, put undercoating on it.
B. Nozzle insert hole
Unit: mm (in)
: Anti-corrosive wax coated portions
JSKIA1888GB
Revision: 2010 May2011 QX56