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BR-8
BRAKE PEDAL
Revision: November 20092006 QX56
Removal and Installation EFS0068Q
REMOVAL
WARNING:
Do not deform the brake tube.
CAUTION:
Before removal and installation the accelerator and brake pedals must be in the forward most
position (closest to the floor). This is to align the base position of the accelerator and brake ped-
als.
Do not disassemble the brake pedal adjusting mechanism.
Avoid damage from dropping the brake pedal assembly during handling.
Keep the brake pedal assembly away from water.
1. Remove the lower driver instrument panel. Refer to IP-13, "
INSTRUMENT LOWER COVER LH" .
2. Remove the stop lamp switch and ASCD switch from the pedal assembly.
1. Brake pedal assembly 2. Snap pin 3. Clip
4. Stop lamp switch 5. Pedal pad 6. Clevis pin
7. ASCD cancel switch
WFIA0232E
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BRAKE PEDALBR-9
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Revision: November 2009 2006 QX56
3. Disconnect the adjustable brake pedal cable from the adjustable
pedal electric motor.
Unlock (1) then pull (2) the adjustable brake pedal cable to
disconnect it from the adjustable pedal electric motor as
shown.
4. Remove snap pin and clevis pin from the clevis of brake booster.
5. Remove mounting nuts and the pedal assembly.
Temporarily install nuts by hand to support booster.
CAUTION:
Before removal and installation the accelerator and brake
pedals must be in the forwardmost position (closest to
the floor). This is to align the base position of the accelerator and brake pedals.
Do not disassemble the brake pedal adjusting mechanism.
Avoid damage from dropping the brake pedal assembly during handling.
Keep the brake pedal assembly away from water.
INSPECTION AFTER REMOVAL
Check brake pedal for following items.
Crack or deformation of clevis pin stopper
Clevis pin deformation
Crack of any welded portion
Brake pedal bend
INSTALLATION
1. Installation is in the reverse order of removal.
Check the brake pedal for smooth operation. There should be no binding or sticking when applying or
releasing the brake pedal.
Check the brake pedal adjustable feature for smooth operation. There should be no binding or sticking
when adjusting the brake pedal forward or backward.
After installing the brake pedal assembly in the vehicle, be sure to adjust it. Refer to BR-6, "Inspection and
Adjustment" .
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SBR997
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BR-10
BRAKE FLUID
Revision: November 20092006 QX56
BRAKE FLUIDPFP:KN100
On-board InspectionEFS004W2
LEVEL CHECK
Make sure the fluid level in reservoir tank is within the standard
(between MAX and MIN lines).
Visually check around reservoir tank for fluid leaks.
If fluid level is excessively low, check brake system for leaks.
If brake warning lamp remains illuminated after parking lever is
released, check brake system for fluid leakage.
Drain and RefillEFS004W3
CAUTION:
Refill with new brake fluid. Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" .
Do not reuse drained brake fluid.
Do not let brake fluid splash on the painted surfaces of the body. This might damage the paint, so
when splashing it, immediately wipe off the area and wash away with water.
Before servicing, disconnect actuator connector or battery negative cable.
1. Connect a vinyl tube to each bleed valve.
2. Depress brake pedal, loosen each bleed valve, and gradually remove brake fluid.
3. Make sure there is no foreign material in reservoir tank, and refill with new brake fluid.
4. Rest foot on brake pedal. Loosen bleed valve. Slowly depress pedal until it stops. Tighten bleed valve. Release brake pedal.
Repeat this process a few times, then pause to add new brake
fluid to master cylinder. Continue until new brake fluid flows out.
Bleed air from brake system. Refer to BR-11, "
Bleeding Brake
System" .
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BRAKE FLUIDBR-11
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Revision: November 2009 2006 QX56
Bleeding Brake SystemEFS004W4
CAUTION:
While bleeding, pay attention to master cylinder fluid level.
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector or battery
negative cable.
2. Connect a vinyl tube to the rear right bleed valve.
3. Fully depress brake pedal 4 to 5 times.
4. With brake pedal depressed, loosen bleed valve to let the air out, and then tighten it immediately.
5. Repeat steps 3 and 4 until no more air comes out.
6. Tighten bleed valve to the specified torque. Refer to BR-21, "
Components" (front disc brake), BR-27,
"Components" (rear disc brake).
7. Repeat steps 2 through 6 at each wheel, with master cylinder reservoir tank filled at least half way, bleed air in order from the front left, rear left, and front right bleed valves.
Page 1005 of 3383

BR-12
BRAKE PIPING AND HOSE
Revision: November 20092006 QX56
BRAKE PIPING AND HOSEPFP:46210
Hydraulic CircuitEFS004W5
CAUTION:
All hoses and tubes must be free from excessive bending, twisting and pulling.
Make sure there is no interference with other parts when turning steering both clockwise and
counterclockwise.
The brake piping is an important safety part. If a brake fluid leak is detected, always disassemble
the parts. Replace applicable part with a new one, if necessary.
Be careful not to splash brake fluid on painted areas; it way cause paint damage. If brake fluid is
splashed on painted areas, wash it away with water immediately.
Do not bend or twist brake hose sharply, or strongly pull it.
When removing components, cover connections so that no dirt, dust, or other foreign matter gets
in.
Refill with new brake fluid. Refer to MA-11, "RECOMMENDED FLUIDS AND LUBRICANTS" .
Do not reuse drained brake fluid.
Removal and Installation of Front Brake Hose EFS004W6
REMOVAL
1. Drain brake fluid. Refer to BR-10, "Drain and Refill" .
2. Using a flare nut wrench, remove brake tube from brake hose.
3. Remove lock plate and brake hose from bracket.
4. Remove union bolt and then remove brake hose from cylinder body.
1. Actuator 2. Master cylinder 3. Brake booster
4. Connector
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BRAKE PIPING AND HOSEBR-13
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INSTALLATION
1. Install brake hose by aligning with the protrusion on cylinder
body, and tighten union bolt. Refer to BR-12, "
Hydraulic Circuit" .
CAUTION:
Do not reuse copper washer.
2. Insert brake hose end through bracket, then secure it to bracket with lock plate.
3. Install brake tube to brake hose, then tighten flare nut using a flare nut wrench.
4. Refill brake fluid and bleed air. Refer to BR-11, "
Bleeding Brake
System" .
Removal and Installation of Rear Brake Hose EFS004W7
REMOVAL
1. Drain brake fluid. Refer to BR-10, "Drain and Refill" .
2. Using a flare nut wrench, remove brake tube from brake hose.
3. Remove lock plate and brake hose from bracket.
4. Remove union bolt, and then remove brake hose from cylinder body.
INSTALLATION
1. Install brake hose by aligning with the protrusion on cylinder body, and tighten union bolt. Refer to BR-12, "
Hydraulic Circuit" .
CAUTION:
Do not reuse copper washers.
2. Insert brake hose end through bracket, then secure it to bracket with lock plate.
3. Install brake tube to brake hose, then tighten flare nut to using a flare nut wrench. Refer to BR-12, "
Hydraulic Circuit" .
4. Refill brake fluid and bleed air. Refer to BR-11, "
Bleeding Brake
System" .
LFIA0214E
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BR-14
BRAKE PIPING AND HOSE
Revision: November 20092006 QX56
Inspection After InstallationEFS004W8
CAUTION:
If a leak is detected at the connections, retighten it or, if necessary, replace the damaged part.
1. Check brake tubes and hose connections for fluid leaks, damage, twist, deformation, contact with other
parts, and loose connections. Replace any damage parts.
2. While depressing brake pedal under a force of 785 N (80 kg-f, 177 lb-f) with engine running for approxi- mately 5 seconds, check for fluid leakage from each part.
Page 1008 of 3383

BRAKE MASTER CYLINDERBR-15
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Revision: November 2009 2006 QX56
BRAKE MASTER CYLINDERPFP:46010
On-board InspectionEFS004W9
LEAK INSPECTION
Check for leaks at brake master cylinder to brake booster attachment point, reservoir tank, and brake tube
connections.
Removal and InstallationEFS004WA
REMOVAL
CAUTION:
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.
Before removing brake master cylinder, depress the brake pedal 5-6 times with the key OFF to
deplete vacuum in the booster.
1. Drain brake fluid. Refer to BR-10, "
Drain and Refill" .
2. Disconnect harness connectors for fluid level sensor and pressure sensors.
3. Using a flare nut wrench, disconnect brake tube from brake master cylinder.
4. Remove brake master cylinder mounting nuts, and master cylinder assembly.
1. Reservoir cap 2. Fluid level sensor3. Grommet
4. Master cylinder sub-assembly 5. Front pressure sensor 6. Rear pressure sensor
7. Seal 8. Reservoir tank
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