2010 INFINITI QX56 brake

PRECAUTIONSBRC-111
< PRECAUTION > [VDC/TCS/ABS]
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5. When the repair work is completed, return the ignition switch to the ″LOCK ″ position before connecting
the battery cables. (At this time, the steering lock mechanism will engage.)
6. Perform a self-diagnosis check of al l control units using CONSULT-III.
Precaution for Brake SystemINFOID:0000000005148094
CAUTION:
• Always use recommended brake fluid. Refer to MA-13, "
Fluids and Lubricants".
• Never reuse drained brake fluid.
• Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately.
• To clean or wash all parts of master cylin der and disc brake caliper, use clean brake fluid.
• Never use mineral oils such as gasoline or kerosen e. They will ruin rubber parts of the hydraulic sys-
tem.
• Use flare nut wrench when removing and installing brake
tube.
• If a brake fluid leak is found, the part must be disassembled
without fail. Then it has to be replaced with a new one if a
defect exists.
• Turn the ignition switch OFF and remove the connector of the ABS actuator and electric unit (con trol unit) or the battery ter-
minal before performing the work.
• Always torque brake lines when installing.
• Burnish the brake contact surf aces after refinishing or replac-
ing rotors, after replacing pads, or if a soft pedal occurs at
very low mileage.
Refer to BR-30, "
Brake Burnishing Procedure" (front disc brake) or BR-35, "Brake Burnishing Proce-
dure" (rear disc brake).
WARNING:
• Clean brake pads and shoes with a waste cl oth, then wipe with a dust collector.
Precaution for Brake ControlINFOID:0000000005148095
• During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.
• Just after starting vehicle, the brake pedal may vibrate or a motor operating noise may be heard from engine
compartment. This is a normal status of operation check.
• Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel, or snow-covered (fresh, deep snow) roads.
• When an error is indicated by ABS or another warning lamp, collect all necessary information from customer (what symptoms are present under what conditions) and check for simple causes before starting diagnosis.
Besides electrical system inspection, check boos ter operation, brake fluid level, and fluid leaks.
• If incorrect tire sizes or types are installed on the vehicle or brake pads are not Genuine NISSAN parts, stop-
ping distance or steering stability may deteriorate.
• If there is a radio, antenna or related wiring near control module, ABS function may have a malfunction or
error.
• If aftermarket parts (car stereo, CD player, etc.) have been installed, check for incidents such as harness pinches, open circuits or improper wiring.
• If the following components are replaced with non-genuine components or modified, the VDC OFF indicator lamp and SLIP indicator lamp may turn on or the VDC system may not operate properly. Components
related to suspension (shock absorbers, struts, springs , bushings, etc.), tires, wheels (exclude specified
size), components related to brake system (pads, roto rs, calipers, etc.), components related to engine (muf-
fler, ECM, etc.), components related to body reinforcement (roll bar, tower bar, etc.).
• Driving with broken or excessively worn suspensi on components, tires or brake system components may
cause the VDC OFF indicator lamp and the SLIP indicator lamp to turn on, and the VDC system may not
operate properly.
• When the TCS or VDC is activated by sudden acceleration or sudden turn, some noise may occur. The noise is a result of the normal operation of the TCS and VDC.
• When driving on roads which have extreme slopes (such as mountainous roads) or high banks (such as sharp curves on a freeway), the VDC may not operate no rmally, or the VDC warning lamp and the SLIP indi-
cator lamp may turn on. This is not a problem if normal operation can be resumed after restarting the engine.
SBR686C
Revision: April 20092010 QX56

PREPARATIONBRC-113
< PREPARATION > [VDC/TCS/ABS]
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PREPARATION
PREPARATION
Special Service ToolINFOID:0000000005148097
The actual shapes of Kent-Moore tools may differ from those of special service tools illustrated here.
Commercial Service ToolINFOID:0000000005148098
Tool number
(Kent-Moore No.)
Tool name Description
KV991J0080
(J-45741)
ABS active wheel sensor tester Checking operation of ABS active wheel sen-
sors
WFIA0101E
Tool name
Description
1. Flare nut crowfoot
2. Torque wrench Removing and installing brake piping
a: 10 mm (0.39 in)/12 mm (0.47 in)
S-NT360
Revision: April 20092010 QX56

BRC-114
< REMOVAL AND INSTALLATION >[VDC/TCS/ABS]
WHEEL SENSORS
REMOVAL AND INSTALLATION
WHEEL SENSORS
Removal and InstallationINFOID:0000000005148099
REMOVAL
1. Remove wheel sensor bolt.
• When removing the front wheel sensor, first remove t he disc rotor to gain access to the front wheel sen-
sor bolt. Refer to BR-31, "
Removal and Installation of Brake Caliper and Rotor".
• When removing the rear wheel sensor, first remove the rear hub and bearing assembly to gain access to
the rear wheel sensor bolt. Refer to RAX-8, "
Removal and Installation".
2. Pull out the sensor, being careful to turn it as little as possible. CAUTION:
• Do not pull on the sensor harness.
3. Disconnect wheel sensor harness electrical connec tor, then remove harness from attaching points.
INSTALLATION
Installation is in the reverse order of removal. Tighten wheel sensor bolt to specification.
CAUTION:
• Inspect wheel sensor O-ring, replace sensor assembly if damaged.
• Before installing wheel sensor, make sure no foreign materials (such as iron fragments) are adhered
to the pick-up part of the sensor, to the inside of the sensor hole or on the rotor mating surface.
• Apply a coat of suitable grease to the wheel sensor O-ring and hole. Refer to MA-13, "
Fluids and
Lubricants".
WFIA0376E
Revision: April 20092010 QX56

BRC-116
< REMOVAL AND INSTALLATION >[VDC/TCS/ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
Removal and InstallationINFOID:0000000005148101
REMOVAL
1. Disconnect the battery negative terminal. Refer to
PG-74, "Removal and Installation".
2. Remove the air cleaner and air duct assembly. Refer to EM-25, "
Removal and Installation".
3. Drain the brake fluid. Refer to BR-17, "
Drain and Refill".
4. Disconnect the actuator harness connector from t he ABS actuator and electric unit (control unit).
CAUTION:
• To remove the brake tubes, use a flare nut wrench to prevent the flare nuts and brake tubes from
being damaged.
• Be careful not to splash brake fluid on painted areas; it may cause paint damage. If brake fluid is splashed on painted areas, wash it away with water immediately.
5. Disconnect the brake tubes.
6. Remove the three bolts and remove the ABS actuator and electric unit (control unit).
INSTALLATION
Installation is in the reverse order of removal.
CAUTION:
• To install, use a flare nut crowfoot and torque wrench (commercial service tools).
1. To rear left caliper
16.2 N·m (1.7 kg-m, 12 ft-lb) 2. To rear right caliper
16.2 N·m (1.7 kg-m, 12 ft-lb) 3. To front left caliper
16.2 N·m (1.7 kg-m, 12 ft-lb)
4. To front right caliper 16.2 N·m (1.7 kg-m, 12 ft-lb) 5. From the master cylinder secondary side
18.2 N·m (1.9 kg-m, 13 ft-lb) 6. From the master cylinder primary side
18.2 N·m (1.9 kg-m, 13 ft-lb)
7. ABS actuator and electric unit (control unit) 8. Actuator harness connector
WFIA0375E
Revision: April 20092010 QX56

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)BRC-117
< REMOVAL AND INSTALLATION > [VDC/TCS/ABS]
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• Always tighten brake tubes to sp ecification when installing.
• Never reuse drained brake fluid.
• After installation of the ABS actuator and elect ric unit (control unit), perform the following.
- Refill brake system with new br ake fluid. Then bleed the air from the system. Refer to BR-17, "
Bleed-
ing Brake System".
- Adjust the steering angle sensor. Refer to BRC-8, "
ADJUSTMENT OF STEERING ANGLE SENSOR
NEUTRAL POSITION : Speci al Repair Requirement".
- Calibrate the decel G sensor. Refer to BRC-9, "
CALIBRATION OF DECEL G SENSOR : Special Repair
Requirement".
Revision: April 20092010 QX56

BODY REPAIRBRM-13
< SERVICE INFORMATION >
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6. 2nd crossmember assembly
7. Front upper link mounting bracket RH/LH
8. Panhard rod bracket reinforcement
9. Bound bumper bracket RH/LH
10. Front brake hose bracket RH/LH
11. Panhard rod reinforcement
12. 4th crossmember gusset RH/LH
13. 2nd cab mounting bracket RH/LH
14. 3rd cab mounting bracket RH/LH
15. 4th cab mounting reinforcement RH/LH
16. 4th cab mounting bracket RH/LH
17. Rear suspension mounting bracket RH/LH
18. Rear brake hose bracket
19. Rear shock absorber bracket assembly RH/LH
20. Rear bound bumper bracket RH/LH
21. Rear bracket bumper reinforcement RH/LH
22. Cab mounting bracket assembly RH/LH
23. 9th crossmember assembly
24. Exhaust bracket assembly
25. Canister bracket, LH
26. 7th crossmember reinforcement
27. 7th crossmember assembly
28. 6th crossmember assembly
29. 4th crossmember gusset RH/LH
30. 4th crossmember assembly
31. 3rd crossmember assembly
32. Frame assembly
Corrosion ProtectionINFOID:0000000005147334
DESCRIPTION
To provide improved corrosion prevention, the follo wing anti-corrosive measures have been implemented in
NISSAN production plants. When repairing or replacing body panels, it is necessary to use the same anti-cor-
rosive measures.
ANTI-CORROSIVE PRECOATED ST EEL (GALVANNEALED STEEL)
To improve repairability and corrosion resistance, a new type of anti-
corrosive precoated steel sheet has been adopted replacing conven-
tional zinc-coated steel sheet.
Galvannealed steel is electroplated and heated to form Zinc-iron
alloy, which provides excellent and long term corrosion resistance
with cationic electrode position primer.
Nissan Genuine Service Parts are fabricated from galvannealed steel. Therefore, it is recommended that
GENUINE NISSAN PARTS or equivalent be used for panel replacement to maintain the anti-corrosive perfor-
mance built into the vehicle at the factory.
PHOSPHATE COATING TREATMENT AND CA TIONIC ELECTRODEPOSITION PRIMER
PIIA0093E
Revision: April 20092010 QX56

CCS-1
CRUISE CONTROL
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SECTION CCS
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CONTENTS
CRUISE CONTROL SYSTEM
BASIC INSPECTION ....... .............................3
DIAGNOSIS AND REPAIR WORKFLOW ..... .....3
Work Flow ........................................................... ......3
INSPECTION AND ADJUSTMENT .....................5
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT .................................................... ......
5
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description ..................................
5
ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement .......
5
LASER BEAM AIMING ADJUSTMENT ................ ......5
LASER BEAM AIMING ADJUSTMENT : Outline
of Laser Beam Aiming Adjustment Procedure ..........
5
LASER BEAM AIMING ADJUSTMENT : Prepara-
tion ...................................................................... ......
5
LASER BEAM AIMING ADJUSTMENT : Setting
up the ICC Target Board ...........................................
6
LASER BEAM AIMING ADJUSTMENT : Sensor
Adjustment ................................................................
7
ACTION TEST ....................................................... ......8
ACTION TEST : ICC System Running Test ..............8
FUNCTION DIAGNOSIS ..............................12
AUTOMATIC SPEED CONTROL DEVICE
(ASCD) ........................................................... ....
12
System Description ............................................. ....12
INTELLIGENT CRUISE CONTROL SYSTEM ....13
System Diagram .................................................. ....13
System Description .................................................13
Component Parts Location ......................................15
Component Description ...........................................16
DIAGNOSIS SYSTEM (ICC SENSOR INTE-
GRATED UNIT) ..................................................
17
Diagnosis Description ......................................... ....17
CONSULT-III Function (ICC) ............................... ....18
COMPONENT DIAGNOSIS .........................22
DTC 11 CONTROL UNIT ..................................22
DTC 11 CONTROL UNIT .................................... ....22
DTC 12 VDC CONTROL UNIT ..........................23
DTC 12 VDC CONTROL UNIT ................................23
DTC 20 CAN COMM CIRCUIT ..........................24
DTC 20 CAN COMM CIRCUIT ................................24
DTC 31 POWER SUPPLY CIR1, DTC 34
POWER SUPPLY CIR2 .....................................
25
DTC 31 POWER SUPPLY CIR1, DTC 34 POWER
SUPPLY CIR2 .........................................................
25
DTC 41 VHCL SPEED SE CIRC .......................26
DTC 41 VHCL SPEED SE CIRC .............................26
DTC 43 VDC/TCS/ABS CIRC ...........................27
DTC 43 VDC/TCS/ABS CIRC .................................27
DTC 45 BRAKE SW/STOP L SW .....................28
DTC 45 BRAKE SW/STOP L SW ............................28
DTC 46 OPERATION SW CIRC .......................30
DTC 46 OPERATION SW CIRC ......................... ....30
DTC 74 LASER BEAM OFF CNTR ..................32
DTC 74 LASER BEAM OFF CNTR .........................32
DTC 90 STOP LAMP RLY FIX ..........................33
DTC 90 STOP LAMP RLY FIX ................................33
DTC 92 ECM CIRCUIT ......................................38
DTC 92 ECM CIRCUIT ............................................38
DTC 96 NP RANGE ..........................................39
DTC 96 NP RANGE ............................................ ....39
DTC 97 AT CIRCUIT .........................................40
DTC 97 AT CIRCUIT ...............................................40
Revision: April 20092010 QX56

CCS
INSPECTION AND ADJUSTMENTCCS-5
< BASIC INSPECTION >
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INSPECTION AND ADJUSTMENT
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
ADDITIONAL SERVICE WHEN REPL ACING CONTROL UNIT : Description
INFOID:0000000005145971
Always perform the laser beam aiming adjustment after repl acing the ICC unit. In addition, test the ICC sys-
tem operations to see if it functions normally.
ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Re-
quirement
INFOID:0000000005145972
1.LASER BEAM AIMING ADJUSTMENT
Adjust laser beam aiming. Refer to CCS-5, "
LASER BEAM AIMING ADJUSTMENT : Outline of Laser Beam
Aiming Adjustment Procedure".
>> GO TO 2
2.ICC SYSTEM ACTION TEST
1. Perform the ICC system operation test. Refer to CCS-8, "
ACTION TEST : ICC System Running Test".
2. Check that the ICC system operates normally.
>> INSPECTION END.
LASER BEAM AIMI NG ADJUSTMENT
LASER BEAM AIMING ADJUSTMENT : Outlin e of Laser Beam Aiming Adjustment
Procedure
INFOID:0000000005145973
CAUTION:
• The laser beam aiming adjustment can not be performed without CONSULT-III.
• The laser beam aiming adjustment must be performed every time the ICC sensor is removed,
installed or has been moved as a result of a collision.
1. Prepare the vehicle and the work area.
2. Set up the ICC target board. For details, refer to Technical Service Bulletin.
3. Adjust the sensor following the procedure on CONSULT-III.
4. Check system operation after the adjustment.
LASER BEAM AIMING ADJU STMENT : PreparationINFOID:0000000005145974
• Place the vehicle on level ground. Shift the transmi ssion into "P" position and release the parking brake.
• Adjust the tire pressure to the specified value.
• See that there is no load in the vehicle. Coolant , engine oil and fuel should be filled to correct level.
• Check that the vehicle suspension has been adjusted to the standard height by the load leveling rear air sus-
pension system. Refer to SCS-7, "
CONSULT-III Function" .
• Clean the sensor with a soft cloth. Tool number : KV99110100 (J-45718)
LKIA0632E
Revision: April 20092010 QX56