lock INFINITI QX56 2006 Factory Service Manual

FRONT DISC BRAKEBR-23
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Revision: November 2009 2006 QX56

Do not reuse drained brake fluid.
1. Install disc rotor.
2. Install sliding pin bolts and torque member to caliper, if removed. Refer to BR-21, "
Components" .
3. Install caliper assembly to the vehicle, then tighten the torque member bolts to the specified torque. Refer to BR-21, "
Compo-
nents" .
CAUTION:

When attaching caliper assembly to the vehicle, wipe any
oil off knuckle spindle, washers and caliper assembly
attachment surfaces.

Do not reuse caliper torque member bolts.
4. Install brake hose to cylinder body, then tighten union bolt to specification, as necessary. Refer to BR-21, "
Components" .
CAUTION:

Do not reuse copper washer.

Install brake hose to caliper assembly together with
union bolt and washers.
5. Refill with new brake fluid and bleed air. Refer to BR-11, "
Bleeding Brake System" .
6. Install tires to the vehicle. Refer to WT-7, "
Rotation" .
Disassembly and Assembly of Brake CaliperEFS004WK
DISASSEMBLY
1. Remove sliding pin bolt, and then remove the pad, shim, shim cover, and pad retainer from the torque member.
2. Remove sliding pins and sliding pin boots from torque member.
3. Place a wooden block as shown, and blow air from union bolt mounting hole to remove pistons and piston boots.
CAUTION:
Do not get your fingers caught in piston.
LFIA0209E
LFIA0214E
MAA0272D

REAR DISC BRAKEBR-29
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Revision: November 2009 2006 QX56
2. Install cylinder body and tighten bolts to specification. Refer to BR-27, "Components" .
CAUTION:
Before installing cylinder body to the vehicle, wipe off mating surface of cylinder body.
3. Install brake hose to cylinder body and tighten union bolt to specification as necessary. Refer to BR-27,
"Components" .
CAUTION:

Do not reuse copper washers.

Securely attach brake hose to protrusion on cylinder body.
4. Refill new brake fluid and bleed air as necessary. Refer to BR-11, "
Bleeding Brake System" .
5. Install tires to the vehicle. Refer to WT-7, "
Rotation" .
Disassembly and Assembly of Brake CaliperEFS004WP
DISASSEMBLY
1. Remove pads from cylinder body.
2. Remove sliding sleeve and boot from cylinder body.
3. Place a wooden block as shown, and blow air into union bolt hole to remove piston and piston boot.
CAUTION:
Do not get your fingers caught in piston.
4. Using a suitable tool, remove piston seal from cylinder body as shown.
CAUTION:
Be careful not to damage cylinder body inner wall.
CALIPER INSPECTION
Cylinder Body
CAUTION:

Use new brake fluid to clean. Do not use mineral oils such as gasoline or kerosene. Refer to MA-
11 , "RECOMMENDED FLUIDS AND LUBRICANTS" .

Check inside surface of cylinder body for score, rust wear, damage or foreign materials. If any of
the above conditions are observed, replace cylinder body.

Minor damage from rust or foreign materials may be eliminated by polishing surface with a fine
emery paper. Replace cylinder body if necessary.
To r q u e M e m b e r
Check for wear, cracks, and damage. If damage or deformation is present, replace the affected part.
Piston
CAUTION:

Piston sliding surface is plated, do not polish with emery paper even if rust of foreign materials
are stuck to sliding surface.

Check piston for score, rust, wear, damage or presence of foreign materials. Replace if any of the
above conditions are observed.
BRD0041D
PFIA0269E

BRC-8
[VDC/TCS/ABS]
SYSTEM DESCRIPTION
Revision: November 20092006 QX56
ABS FunctionEFS004XC

The Anti-Lock Brake System detects wheel revolution while braking and improves handling stability during
sudden braking by electrically preventing wheel lockup. Maneuverability is also improved for avoiding
obstacles.

If the electrical system malfunctions, the Fail-Safe function is activated, the ABS becomes inoperative and
the ABS warning lamp turns on.

The electrical system can be diagnosed using CONSULT-II.

During ABS operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.

Just after starting the 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.
EBD FunctionEFS004XD

Electronic Brake Distribution is a function that detects subtle slippages between the front and rear wheels
during braking, and it improves handling stability by electronically controlling the brake fluid pressure
which results in reduced rear wheel slippage.

If the electrical system malfunctions, the Fail-Safe function is activated, the EBD and ABS become inoper-
ative, and the ABS warning lamp and BRAKE warning lamp are turned on.

The electrical system can be diagnosed using CONSULT-II.

During EBD operation, the brake pedal may vibrate lightly and a mechanical noise may be heard. This is
normal.

Just after starting the 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.
TCS FunctionEFS004XE

Spinning of the drive wheels is detected by the ABS actuator and electric unit (control unit) using inputs
from the wheel speed sensors. If wheel spin occurs, the drive wheel right and left brake fluid pressure
control and engine fuel cut are activated while the throttle value is restricted to reduce the engine torque
and decrease the amount of wheel spin. In addition, the throttle opening is controlled to achieve the opti-
mum engine torque.

Depending on road condition, the vehicle may have a sluggish feel. This is normal, because optimum trac-
tion has the highest priority during TCS operation.

TCS may be activated during sudden vehicle acceleration, wide open throttle acceleration, sudden trans-
mission shifts or when the vehicle is driven on a road with a varying surface friction coefficient.

The SLIP indicator lamp flashes to inform the driver of TCS operation.
VDC FunctionEFS004XF

In addition to the ABS/TCS function, the driver steering amount and brake operation amount are detected
from the steering angle sensor and front and rear pressure sensors, and the vehicle's driving status
(amount of under steering/over steering) is determined using inputs from the yaw rate sensor/side G sen-
sor, wheel speed sensors, etc. and this information is used to improve vehicle stability by controlling the
braking and engine torque application to the wheels.

The SLIP indicator lamp flashes to inform the driver of VDC operation.

During VDC operation, the vehicle body and brake pedal may vibrate lightly and a mechanical noise may
be heard. This is normal.

The ABS warning lamp, VDC OFF indicator lamp and SLIP indicator lamp may turn on when the vehicle is
subject to strong shaking or large vibration, such as when the vehicle is on a turn table or a ship while the
engine is running or on a steep slope. In this case, restart the engine on a normal road and if the ABS
warning lamp, VDC OFF indicator lamp and SLIP indicator lamp turn off, there is no problem.
Fail-Safe FunctionEFS004XG
CAUTION:
If the Fail-Safe function is activated, perform the Self Diagnosis for ABS/TCS/VDC system.

OVERHEATING CAUSE ANALYSISCO-7
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Revision: November 2009 2006 QX56
Except cool-
ing system
parts mal-
function—
Overload on engine Abusive driving
High engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
—
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flow Blocked bumper
—
—
Blocked radiator grille
Installed car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser Blocked air flow
Installed large fog lamp
Symptom
Check items

ENGINE COOLANTCO-11
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Revision: November 2009 2006 QX56
DRAINING ENGINE COOLANT
1. Turn ignition switch ON and set temperature control lever all the way to HOT position or the highest tem-
perature position. Wait 10 seconds and turn ignition switch OFF.
2. Remove the engine front undercover using power tool.
3. Open the radiator drain plug at the bottom of the radiator, and remove the radiator filler cap. This is the only step required
when partially draining the cooling system (radiator only).
CAUTION:
Do not to allow the coolant to contact the drive belts.
4. When draining all of the coolant in the system for engine removal or repair, it is necessary to drain the cylinder block.
Remove the RH cylinder block drain plug to drain the right bank
and the oil cooler hose to drain the left bank as shown.
5. Remove the reservoir tank to drain the engine coolant, then clean the reservoir tank before installing it.
6. Check the drained coolant for contaminants such as rust, corrosion or discoloration. If the coolant is contaminated, flush the engine cooling system. Refer to CO-12, "
FLUSHING COOLING
SYSTEM" .
REFILLING ENGINE COOLANT
1. Close the radiator drain plug. Install the reservoir tank, cylinder block drain plug, and the oil cooler hose, if
removed for a total system drain or for engine removal or repair.

The radiator must be completely empty of coolant and water.

Apply sealant to the threads of the cylinder block drain plug. Use Genuine High Performance Thread
Sealant or equivalent. Refer to GI-46, "
Recommended Chemical Products and Sealants" .
2. Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with the engine OFF as necessary to activate the heater mode.
3. Remove the vented reservoir cap and replace it with a non-vented reservoir cap before filling the cooling system.
WBIA0391E
PBIC0146E
WBIA0392E
Radiator drain plug : Refer to CO-14, "RADIATOR" .
RH cylinder block drain plug : Refer to EM-78, "
CYLINDER BLOCK" .

WATER PUMPCO-19
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Revision: November 2009 2006 QX56
WAT E R P U MPPFP:21020
Removal and InstallationEBS00REF
CAUTION:

When removing water pump, be careful not to get engine coolant on drive belt.

Water pump cannot be disassembled and should be replaced as a unit.
REMOVAL
1. Drain engine coolant so that no engine coolant comes out from water pump fitting hole. Refer to CO-11,
"DRAINING ENGINE COOLANT" .
CAUTION:
Perform when the engine is cold.
2. Remove the engine front undercover using power tool.
3. Remove the air duct and resonator assembly. Refer to EM-15, "
Removal and Installation" .
4. Remove the drive belt. Refer to EM-13, "
Removal and Installation" .
5. Remove the water pump pulley.
6. Remove the water pump.

Engine coolant will leak from the cylinder block, so have a receptacle ready below.
CAUTION:
Handle water pump vane so that it does not contact any other parts.
INSPECTION AFTER REMOVAL

Visually check that there is no significant dirt or rust on the water
pump body and vane.

Make sure there is no looseness in the vane shaft, and that it
turns smoothly when rotated by hand.

Replace the water pump, if necessary.
INSTALLATION
Installation is in the reverse order of removal.
KBIA2543E
1. Gasket 2. Water pump3. Water pump pulley
KBIA2552E

DI-2Revision: November 20092006 QX56
Wiring Diagram — CHIME — ..............................
... 46
Terminals and Reference Value for BCM ............. ... 48
Terminals and Reference Value for Combination
Meter ................................................................... ... 49
How to Proceed With Trouble Diagnosis ............. ... 49
Preliminary Check ............................................... ... 50
INSPECTION FOR POWER SUPPLY AND
GROUND CIRCUIT .......................................... ... 50
CONSULT-II Function (BCM) ............................... ... 51
CONSULT-II BASIC OPERATION PROCEDURE ... 51
DATA MONITOR ............................................... ... 52
ACTIVE TEST .................................................. ... 52
SELF-DIAGNOSTIC RESULTS ........................ ... 53
All Warning Chimes Do Not Operate ................... ... 53
Key Warning Chime and Light Warning Chime Do
Not Operate (Seat Belt Warning Chime Does Oper-
ate) ...................................................................... ... 54
Key Warning Chime Does Not Operate ............... ... 55
Light Warning Chime Does Not Operate ............. ... 57
Seat Belt Warning Chime Does Not Operate ...... ... 58
REAR SONAR SYSTEM ........................................ ... 60
Component Parts and Harness Connector Location ... 60
System Description .............................................. ... 61
FUNCTION ....................................................... ... 61
REAR SONAR SYSTEM OFF SWITCH ........... ... 61
SONAR BUZZER ............................................. ... 61
REAR SONAR SENSOR ..................................... 62
Wiring Diagram — SONAR — ............................. ... 63
Terminals And Reference Value For Sonar Control
Unit ...................................................................... ... 65
How to Proceed With Trouble Diagnosis ............. ... 65
Pre-diagnosis Inspection ..................................... ... 66
SENSOR STATUS CHECK ................................. 66
Self-diagnosis Function ....................................... ... 66
ENTERING DIAGNOSTICS MODE ................. ... 66
REQUESTING NUMBER OF FAULT CODES
MODE ............................................................... ... 66
REQUESTING FAULT CODES MODE ............ ... 67
IDLING OR CLEARING FAULT CODES MODE ... 67
Preliminary Check ............................................... ... 68
INSPECTION FOR POWER SUPPLY AND GROUND CIRCUIT ..........................................
... 68
Symptom Chart .................................................... ... 69
Component Inspection ......................................... ... 70
SONAR BUZZER .............................................. ... 70
REAR SONAR SYSTEM OFF SWITCH ........... ... 70
REAR SONAR SYSTEM OFF INDICATOR ...... ... 70
Removal and Installation ...................................... ... 70
REAR SONAR SENSORS ................................ ... 70
SONAR CONTROL UNIT ................................. ... 70
CLOCK ................................................................... ... 71
Wiring Diagram — CLOCK — .............................. ... 71
Removal and Installation of Clock ........................ ... 72
REMOVAL ......................................................... ... 72
INSTALLATION ................................................. ... 72
REAR VIEW MONITOR .......................................... ... 73
Component Parts and Harness Connector Location ... 73
System Description .............................................. ... 74
POWER SUPPLY AND GROUND .................... ... 74
AV COMMUNICATION LINE ............................ ... 74
REAR VIEW CAMERA OPERATION ............... ... 74
Schematic ............................................................ ... 75
Wiring Diagram — R/VIEW — ............................. ... 76
Terminals and Reference Value for Rear View Cam-
era Control Unit .................................................... ... 79
CONSULT-II Function (REARVIEW CAMERA) ... ... 80
CONSULT-II BASIC OPERATION .................... ... 80
WORK SUPPORT ............................................ ... 81
DATA MONITOR ............................................... ... 81
Side Distance Guideline Correction ..................... ... 82
SIDE DISTANCE GUIDELINE CORRECTION
PROCEDURE ................................................... ... 82
Power Supply and Ground Circuit Inspection ...... ... 84
Rear View Is Not Displayed With The A/T Selector
Lever In R Position ............................................... ... 85
Removal and Installation of Rear View Camera Con-
trol Unit ................................................................. ... 90
REMOVAL ......................................................... ... 90
INSTALLATION ................................................. ... 90
Removal and Installation of Rear View Camera .. ... 90
REMOVAL ......................................................... ... 90
INSTALLATION ................................................. ... 90

DI-6
COMBINATION METERS
Revision: November 20092006 QX56
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No.19, located in the fuse block (J/B)]

to combination meter terminal 8.
With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No.14, located in the fuse block (J/B)]

to combination meter terminal 24.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No.4, located in the fuse block (J/B)]

to combination meter terminal 1.
Ground is supplied

to combination meter terminal 17

through body grounds M57, M61 and M79.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides an engine coolant temperature signal to combination meter via CAN communication lines.
ENGINE OIL PRESSURE GAUGE
The engine oil pressure gauge indicates the engine oil pressure.
The engine oil pressure gauge is regulated by the unified meter control unit and input from the oil pressure
sensor.
A/T OIL TEMPERATURE GAUGE
The A/T oil temperature gauge indicates the A/T fluid temperature.
TCM (transmission control module) provides an A/T fluid temperature signal to combination meter via CAN
communication lines.
V O LTA G E G A U G E
The voltage gauge indicates the battery/charging system voltage.
The voltage gauge is regulated by the unified meter control unit.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM provides an engine speed signal to combination meter via CAN communication lines.
FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by the unified meter control unit and a variable resistor signal supplied

to combination meter terminal 15.

through fuel level sensor unit and fuel pump terminal 2

through fuel level sensor unit and fuel pump terminal 5

from combination meter terminal 16
SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the combination meter via CAN
communication lines.
CAN COMMUNICATION SYSTEM DESCRIPTION
Refer to LAN-26, "CAN COMMUNICATION" .

COMBINATION METERSDI-7
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Revision: November 2009 2006 QX56
Component Parts and Harness Connector LocationEKS00BBV
1. Fuse block (J/B)2. Combination meter M243. Fuel level sensor unit and fuel pump
C5 (view with inspection hole cover
removed)
4. ECM E16 (view with battery removed) 5. ABS actuator and electric unit (con-
trol unit) E125 6. Oil pressure sensor F4
A. Oil pan (upper)
7. A/T assembly F9
WKIA4591E

DI-28
COMPASS AND THERMOMETER
Revision: November 20092006 QX56
Trouble DiagnosesEKS00GBW
PRELIMINARY CHECK FOR THERMOMETER
1. COOL DOWN CHECK
1. Turn the ignition switch to the ON position.
2. Cool down ambient sensor 2 with water or ice.
Does the indicated temperature drop?
YES >> GO TO 2.
NO >> The system is malfunctioning. Check the system following “INSPECTION/COMPASS AND THER-
MOMETER ”. Refer to DI-28, "
INSPECTION/COMPASS AND THERMOMETER" .
2. WARM UP CHECK
1. Leave the vehicle for 10 minutes.
2. With the ignition switch in the ON position, disconnect and reconnect ambient sensor 2 connector.
Does the indicated temperature rise?
YES >> The system is OK.
NO >> The system is malfunctioning. Check the system following “INSPECTION/COMPASS AND THER-
MOMETER ”. Refer to DI-28, "
INSPECTION/COMPASS AND THERMOMETER" .
INSPECTION/COMPASS AND THERMOMETER
Symptom Possible causes Repair order
No display at all 1. 10A fuse. 2. Ground circuit.
3. auto anti-dazzling inside mirror. 1. Check 10A fuse [No. 12, located in fuse block (J/B)].
Turn the ignition switch ON and verify that battery positive volt-
age is at terminal 6 of auto anti-dazzling inside mirror.
2. Check ground circuit for auto anti-dazzling inside mirror.
3. Replace auto anti-dazzling inside mirror.
Forward direction indi-
cation slips off the mark
or incorrect. 1. In manual correction mode (Bar and
display vanish).
2. Zone variation change is not done. 1. Drive the vehicle and turn at an angle of 90
°.
2. Perform the zone variation change.
Displays wrong tem-
perature when ambient
temperature is between
− 40 °C ( −40° F) and
55 °C (130 °F) 1. Check operation.
2. Ambient sensor 2 circuit.
3. Ambient sensor 2.
4. Auto anti-dazzling inside mirror.
1. Perform preliminary check shown above.
2. Check harness for open or short between ambient sensor 2 and
auto anti-dazzling inside mirror.
3. Replace ambient sensor 2.
4. Replace auto anti-dazzling inside mirror.
Displays SC or OC 1. Ambient sensor 2 circuit. 2. Ambient sensor 2.
3. Auto anti-dazzling inside mirror. 1. Check harness for open or short between ambient sensor 2 and
auto anti-dazzling inside mirror.
2. Replace ambient sensor 2.
3. Replace auto anti-dazzling inside mirror.