Thursday, March 26, 2020

2009 Nissan Maxima S ALL NISSAN; BRAKE NOISE/JUDDER/PEDAL FEEL DIAGNOSIS AND REPAIR

ALL NISSAN; BRAKE NOISE/JUDDER/PEDAL FEEL DIAGNOSIS AND REPAIR
TECHNICAL SERVICE BULLETIN
Reference Number(s): NTB00-033e, Date of Issue: July 23, 2013
APPLIED VEHICLES
All Nissan
SERVICE INFORMATION
l This bulletin is to assist you in responding to customer questions about brake
operation, and provides diagnostic and repair information for each item listed, if
any should occur.
l Most brake incidents fall into the following categories:
a. Brake Noise: A squeak, squeal, clunk, or groan that occurs when the brakes
are applied or released.
b. Brake Judder: A vibration that can be felt in the vehicle, steering wheel or
brake pedal when the brakes are applied.
c. Pedal Feel: The effort needed to operate the brakes is too high or too low.
SERVICE PROCEDURE
1. Verify the condition by road testing the vehicle with the customer.
2. Determine the specific brake incident based on the description in the Service
Information above.
3. Follow the appropriate repair procedure(s), listed below, for your specific
incident.
BRAKE NOISE
l Brakes can make a range of noises when applied or released. Some noises are normal
and no repair action should be taken.
l Use the following descriptions to identify the specific type of brake noise and
the appropriate repair:
SQUEAK NOISE WHEN THE BRAKES ARE COLD
l Usually occurs during the first few stops in the morning.
l This is a normal condition. No service action is necessary.
SQUEAK NOISE WITH THE BRAKES AT NORMAL OPERATING TEMPERATURES
l Refer to technical bulletins specific to the model of vehicle regarding this
NISSAN: All Nissan
CLASSIFICATION: BR00-004e
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incident.
l If there are no bulletins for the car you are working on, install OE type pads
using the information listed under Brake Service on page 6 of this bulletin and
the appropriate Service Manual procedures.
NOTES ABOUT BRAKE PADS AND BRAKE NOISE
Original Equipment (OE) brake pads are installed on all current Nissan vehicles at the
factory.
l The OE pads use a Non-asbestos Organic (NAO) compound. The NAO material provides
state of the art resistance to squeal noise.
l These pads are available as service parts and must be used if replacing brake pads
under the terms of the Nissan new car warranty.
Value Advantage brake pads are also available as a high quality service replacement
part at a very attractive price.
l These pads use a NAO compound similar to the material used in Nissan OE pads.
l Value Advantage brake pads offer excellent braking performance but do not offer
the same level of noise resistance as the OE-NAO pads.
l Service customers have varying sensitivity to brake noise and the individual
customer must decide which product best suits his or her requirements, balancing
price and noise resistance.
l Make sure the Service Advisor adequately explains the differences between Value
Advantage brake pads and Nissan OE-NAO brake pads to the customer when discussing
brake service.
LOUD CONTINUOUS SQUEAK/SQUEAL NOISE
l Occurs with or without braking.
l This is a normal brake function. It occurs when the brake pad wear indicators
contact the rotor.
l It indicates the brake pads are worn out and need to be replaced. Install new
brake pads using the information listed under Brake Service shown below in this
bulletin and the appropriate Service Manual procedures.
GROAN NOISE WHEN SLIGHTLY RELEASING THE BRAKES AFTER COMING TO A STOP
l This is sometimes called "creep groan".
l It is a normal condition. No repair or service is necessary.
GROAN NOISE DURING STOPPING
l Usually caused by glazing of the rotor's surface as a result of heavy or frequent
braking.
l Refer to technical bulletins specific to the model of vehicle regarding this
incident.
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l Replace the brake pads, then resurface the rotors and finish them with sand paper.
Refer to BRAKE SERVICE for additional detail.
SINGLE CLUNK NOISE FROM FRONT SUSPENSION WHEN APPLYING THE BRAKES
l The noise is a result of the brake pads shifting in the direction of rotor
rotation when the brakes are applied.
l Can be duplicated by lightly touching the brake pedal.
l If the brake pedal is pushed hard, the noise is less likely to occur.
l Make sure the brake pads and pad hardware (shims, springs, clips, etc) are
installed correctly.
l Refer to ASIST for vehicle specific brake service information.
l Refer to BRAKE SERVICE for additional detail.
MULTIPLE CLUNK NOISE AND/OR PEDAL PULSATION THAT OCCURS ONLY ONE TIME
AFTER THE ENGINE IS STARTED
l This is a normal ABS Self Check noise. No service action is necessary.
l The vehicle's ABS system performs a self check. On some models this self check
occurs with the first application of the brakes after the engine is started. On
other models the self check occurs the first time the vehicle reaches 5 mph after
the engine is started.
REAR BRAKE SQUEAL
l Usually due to an accumulation of brake dust and dirt between the pads/shoes and
rotors or drums.
l Clean all dust and dirt from the brake shoes, backing plates and related
components.
l Refer to ASIST (Service Bulletins and ESM) for correct installation and
lubrication of brake pads, caliper parts, and hardware.
BRAKE JUDDER
l Brake Judder is caused by rotor thickness variation and/or rotor run out.
Rotor Thickness Variation: When the inner and outer surface of the rotor are not
flat and not parallel, the brake pads will travel in and out as they follow the
low and high spots on the rotor (see Figure 1).
WARNING: Brake dust may be hazardous if inhaled. Refer to the Service
Manual (ESM) for brake dust precautions and use approved brake
cleaning equipment.
CAUTION: Do not get grease on the brake pad friction surface.
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Rotor Run Out: If the brake rotor is not true to the hub center, the brake pads
contact one point on each side of the rotor with each wheel rotation, even if the
brakes are not applied. Over time, this point contact will cause the rotor to wear
more in these areas and cause rotor thickness variation (see Figure 2).
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l This motion of the brake pads is transferred through the caliper pistons and is
felt in the brake pedal as a pulsation. In severe cases it can also cause a back
and forth oscillation in the steering wheel.
VEHICLE STORAGE
l If the vehicle is not operated for periods of time, the area of the brake rotors
not covered by the brake pads will rust.
l The friction characteristics between the rusted and un-rusted areas of the rotor
braking surface will be different.
l This difference may cause brake judder at low and/or high mileage, even after the
rust wears off.
LUG NUT OVERTORQUE
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l Another contributor of brake judder is lug nut overtorque. This can occur if the
lug nuts are over tightened, especially with an air impact wrench.
BRAKE JUDDER REPAIR
l Brake judder incidents must be corrected by turning the rotors with a ProCut? PFM
series On-Car Brake Lathe.
l Refer to NTB04-094 for information on using this lathe.
l If the rotors are replaced, make sure you index them to the axle hub to ensure
minimum runout (see ROTOR INDEXING).
PEDAL FEEL
l Some customers may say that the brake pedal feels too high or low when applying
the brakes.
l This may indicate the brake system needs service or it may be the result of the
customer comparing the feel of the brakes in a new car with the feel of the brakes
in a previous car.
l Road test the vehicle with the customer. Compare brake operation to a "known good"
vehicle and determine if brake service is necessary. If so, refer to the following
service items:
a. Inspect the brake calipers and make sure they are correctly installed and
sliding freely.
b. Inspect the front and rear brakes and make sure the brake pads and/or shoes
are properly installed.
c. Bleed all air from the brake system.
d. Make sure the brake pedal stroke and free play are adjusted correctly. Refer
to the appropriate section of the ESM which covers brakes.
BRAKE SERVICE
To ensure a high quality brake service be sure to:
1. Finish rotors properly.
l This is one of the most important aspects of preventing and eliminating brake
noise.
l Use the ProCut? PFM series on-car brake lathe. It has been chosen as the
approved tool for rotor resurfacing (refer to NTB04-094 for additional
information).
2. Correctly install pads and shims.
NOTE: Use Essential Tool J-46532 (Brake Pedal Height Tool) for brake
pedal height check and adjustment. This tool is available from
TECH-MATE at 1-800-662-2001.
IMPORTANT: Correct installation and lubrication of brake pads and all caliper parts
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l Refer to ASIST (Service Bulletins and ESM) for correct installation and
lubrication of brake pads, caliper parts, and hardware.
3. Perform the following post-installation checks.
l Confirm that brake pads fit snugly in the calipers. Replace worn components
as necessary.
l Test drive after repairs and burnish the new brakes. This will influence
brake performance, including noise.
a. Drive the vehicle on a straight smooth road at about 30 mph (50 kph).
b. Use medium brake pedal/foot effort to bring the vehicle to a complete
stop from about 30 mph (50 kph). Adjust your pedal/foot pressure so that
the vehicle stopping time is 3-5 seconds.
c. Cool the brake system by driving at about 30 mph (50 kph) for
approximately one minute without stopping.
d. Repeat steps 1, 2, and 3 ten times to complete the burnishing process.
4. Follow-up to ensure customer satisfaction, safety, and proper brake performance.
l Confirm the procedures described in steps 2 - 4 above have been strictly
followed.
ROTOR INDEXING
When installing a new rotor, a rotor that has been surfaced off the car, or a rotor
that has been removed for any reason, use the following indexing procedure to ensure
the minimum amount of rotor run-out.
1. Make sure the rotor is fully contacting the hub. Clean the rotor-to-hub surface if
it is rusty.
2. Install the rotor and all lug nuts. Tighten the lug nuts to 40 ft-lbs (for this
indexing process only).
3. Place a reference mark on the rotor and hub.
4. Measure rotor run-out with a dial indicator. If the run-out is above limit
continue with step 5.
l For more detail of the run-out limit refer to the ESM.
and hardware is essential for proper brake operation and will help
dampen noise-causing movement and vibrations.
CAUTION: Do Not get grease on the brake pad friction surface.
NOTE: For cleaning the hub surface, specifically around the wheel studs, it is
recommended to use the Wheel Hub Cleaning Kit #J-42450-A, which
can be ordered from Nissan TECH-MATE at 1-800-662-2001.
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5. Remove the lug nuts and shift the position of the rotor one lug clockwise, then
reinstall the lug nuts and torque to 40 ft-lbs (again, for this indexing process
only).
l Repeat step 4 and 5 until the rotor is positioned with the least amount of
runout.
6. After you find the position with the least amount of runout, if the runout is
still more than the limit, you'll need to turn (resurface) the new rotors using
the ProCut? PFM Series on-car brake lathe.
CLAIMS INFORMATION
Please reference the current Nissan "Warranty Flat Rate Manual" and submit your claim
(s) using the Operation Code (Op Code) or combination of Op Codes that best describes
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the operations performed.
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