Acura RL. Instruction — page 372

2005-08 BRAKES

Conventional Brake Components — RL

SPECIAL TOOLS

Fig. 1: Identifying Special Tools
Courtesy of AMERICAN HONDA MOTOR CO., INC.

COMPONENT LOCATION INDEX

2007 Acura RL

2005-08 BRAKES Conventional Brake Components — RL

2007 Acura RL

2005-08 BRAKES Conventional Brake Components — RL

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© 2005 Mitchell Repair Information Company, LLC.

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© 2005 Mitchell Repair Information Company, LLC.

Fig. 2: Identifying Conventional Brakes Components Location
Courtesy of AMERICAN HONDA MOTOR CO., INC.

BRAKE SYSTEM INSPECTION AND TEST

Inspect the brake system components listed. Repair or replace any parts that are leaking or damaged.

Component Inspections:

COMPONENT INSPECTIONS CHART

Component

Procedure

Also check for:

Master Cylinder

Look for damage or signs of fluid
leakage at:

Reservoir or master cylinder
body.

Line joints.

Between master cylinder and

Bulging seal at reservoir cap. This is a
sign of fluid contamination.

2007 Acura RL

2005-08 BRAKES Conventional Brake Components — RL

me

Friday, June 05, 2009 3:00:06 PM

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© 2005 Mitchell Repair Information Company, LLC.

BRAKE SYSTEM TEST

Brake pedal sinks/fades when braking

1. Set the parking brake, and start the engine, then turn off the A/C switch. Allow the engine to warm up

to normal operating temperature (radiator fan comes on twice).

2. Attach a 50 mm (2 in.) piece of masking tape along the bottom of the steering wheel, and draw a

horizontal reference mark across it.

3. With the transmission in the P or N position, press and hold the brake pedal lightly (about the same

pressure needed to keep an A/T-equipped car from creeping), then release the parking brake.

4. While still holding the brake pedal, hook the end of the tape measure behind the brake pedal, then pull

the tape up to the steering wheel, noting where the tape measure lines up with the reference mark you
made on the masking tape.

5. Apply steady pressure to the brake pedal for 3 minutes.

6. Watch the tape measure.

If it moves less than 10 mm (3/8 in.), the master cylinder is OK.

If it moves more than 10 mm (3/8 in.), replace the master cylinder.

SYMPTOM TROUBLESHOOTING

RAPID BRAKE PAD WEAR, VEHICLE VIBRATION (AFTER A LONG DRIVE), OR HIGH,
HARD BRAKE PEDAL

1. Drive the vehicle until the brakes drag or until the pedal is high and hard. This can take 20 or more

brake pedal applications during an extended test-drive.

2. With the engine running, raise the vehicle on a lift, and spin all four wheels by hand.

booster.

Brake Hoses

Look for damage or signs of fluid
leakage at:

Line joints and line joints
connections.

Hoses and lines, also inspect for
twisting or damage.

Bulging, twisted, or bent lines.

Caliper

Look for damage or signs of fluid
leakage at:

Piston seal.

Line joints connections.

Bleeder screw.

Seized or sticking caliper pins.

VSA Modulator-
Control Unit

Look for damage or signs of fluid
leakage at:

Line joints.

Modulator-control unit.

2007 Acura RL

2005-08 BRAKES Conventional Brake Components — RL

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© 2005 Mitchell Repair Information Company, LLC.

Is there brake drag at any of the wheels?

YES -Go to step 3.

NO -Look for other causes of the pad wear, high pedal, or vehicle vibration.

3. Turn the engine off, pump the brake pedal to deplete the vacuum in the brake booster, and then spin

the wheels again to check for brake drag.

Is there brake drag at any of the wheels?

YES -Go to step 4.

NO -Replace the brake booster.

4. Without removing the brake lines, unbolt and separate the master cylinder from the booster, then spin

the wheels to check for brake drag.

Is there brake drag at any of the wheels?

YES -Go to step 5.

NO -Check the brake pedal position switch adjustment and pedal free play (see BRAKE PEDAL
AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT
).

5. Loosen the hydraulic lines at the master cylinder, then spin the wheels to check for brake drag.

Is there brake drag at any of the wheels?

YES -Go to step 6.

NO -Replace the master cylinder (see MASTER CYLINDER REPLACEMENT ).

6. Loosen the breeder screws at each caliper, then spin the wheels to check for brake drag.

Is there brake drag at any of the wheels?

YES -Disassemble and repair the caliper on the wheel(s) with brake drag.

NO -Look for a bulging master cylinder cap seal, discolored or contaminated brake fluid in the master
cylinder, or damaged brake lines. If any of these items are damaged, replace them. If all of these items
are OK, replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT
REMOVAL AND INSTALLATION
).

BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT

PEDAL HEIGHT

1. Turn the brake pedal position switch (A) counterclockwise, and pull it back until it is no longer

touching the brake pedal.

2007 Acura RL

2005-08 BRAKES Conventional Brake Components — RL

me

Friday, June 05, 2009 3:00:06 PM

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© 2005 Mitchell Repair Information Company, LLC.

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