Get Driving -> Brakes Guide for Aston Martin Dbx SUV 2020

Brakes

Footbrake

If vacuum boost or a brake circuit fails, the footbrake will

still operate, but with greater pedal pressure, increased pedal

travel and longer stopping distances. Contact your Aston

Martin Dealer.

The footbrake uses a vacuum boosted, dual (diagonal split) circuit

hydraulic system with Anti-lock Brake System (ABS).

Warning: In the event of a brake failure, bring the vehicle

to a stop as soon as it is safe to do so. Do not continue to

drive the vehicle. To do so could result in an accident or

collision resulting in death or serious injury.

The high performance brake system used on this vehicle is

designed to provide optimal braking under all operating

conditions. However, an inherent characteristic of this braking

system is some brake noise. Certain combinations of speed,

braking forces and ambient conditions may also cause the brakes

to squeal.

Warning: Greater care may be necessary after a long drive

over salted or gritted roads or if driving in heavy rain,

through water or a vehicle wash. Brake action may be

delayed and increased braking pressure may be required.

Brake Throttle Override

If the throttle and brake pedals are both pressed at the same time

for over 3 seconds, the engine will restrict available torque.

Normal functionality will return when the throttle pedal is

pressed without the brake pedal.

Warning: Aston Martin recommend that the brake fluid is

replaced before and after the vehicle is used for high

performance driving such as a track day. Failure to do so

may result in greatly reduced brake performance. Contact

your Aston Martin Dealer.

Driving 5.23

ABS Settings

Anti-lock Braking System (ABS)

The Anti-lock Braking System (ABS) will change its operation

depending on ESP and Drive mode.

Safety

It is always the driver's responsibility to drive safely with regard to

driving conditions and according to the law. The fact that a

vehicle is equipped with ABS must never let the driver be

Stage One

When ESP is set to ON, the ABS is tuned to give a level of vehicle

tempted into taking risks which could affect his or her safety or performance, control and stability under braking that will cover

that of other road users. everyday driving situations and weather (dry, wet, ice and snow).

The addition of ABS cannot overcome the consequences of trying Stage Two

to stop in too short a distance, cornering at too high a speed, or

aquaplaning (where the tires are prevented from contacting the

road surface by a layer of water).

When ESP is set to Sport+ or OFF, the ABS is tuned to allow

more experienced drivers to drive closer to the limits of the

vehicle's ability and enjoy its natural balance in a track

environment. When the ABS is set to stage two, the ABS is

The driver should always take road conditions into account. A

slippery road surface always requires more braking distance for a applied in the following ways:

given speed, even with ABS. Stopping distances can increase with

ABS compared to locked wheels on slushy snow, gravel, sand or

certain heavily corrugated or ridged warning sections of road

surfaces.

• The Electronic Brake-force Distribution (EBD) increases

braking force to the rear of the vehicle. This is done by

allowing a greater level of slip at the rear axle and a quicker

increase in pressure in the rear brakes. Cornering agility will

be enhanced when braking, but the driver will experience

more vibration through the brake pedal.

If any braking system malfunctions, have the braking and ABS

systems checked immediately by your Aston Martin Dealer.

• The ABS will allow more slip when the tires are at a higher

working temperature, such as when the vehicle is driven on a

track. The driver will have more control over brake

performance before the ABS is activated.

The Anti-lock Braking System (ABS) helps prevent the road

wheels from locking and causing the vehicle to skid during

emergency braking. This also assists the driver in maintaining

steering and directional stability.

• Braking performance is given greater priority over stability in

areas with different friction surfaces. Increased steering input

is required to maintain the direction of travel, but optimum

vehicle deceleration is achieved.

If the braking force exceeds tire grip in an emergency braking

situation, the ABS operates to prevent the wheels locking. A

pulsating effect is felt through the brake pedal when this happens.

This is a normal effect of the ABS operating.

5.24 Driving

• The ABS provides a more aggressive pressure increase for

situations where a wheel can become temporarily unloaded,

such as in track sections featuring fast, tight corners, strong

cambers or high-speed crests.

Brake Warnings

Warning: If either brake warning symbol comes ON, you

should immediately be prepared for increased stopping

distances or partial failure of the braking system.

Stage Three

When ESP is set to Terrain mode the ABS is tuned to allow greater

braking performance when driving off-road on loose or rough

surfaces (grass, gravel, mud and deep snow). When ABS is set to

stage three, the ABS is applied in the following ways:

If the brake warning symbol

comes ON while driving:

• The brake booster system has a fault and braking performance

may be affected.

• The brake fluid level is insufficient.

• The ABS will allow more slip on low friction surfaces to

optimise the available braking performance.

• Braking performance is given greater priority over stability in

areas with low friction surfaces. Increased steering input is

required to maintain the direction of travel, but improved

vehicle deceleration is achieved.

A message will also show in the instrument cluster window

with further information.

Stop as soon as possible in a safe and convenient place. Apply the

footbrake and make sure that the park brake is fully released. If

the warning symbol stays ON, do not drive the vehicle. It is

essential that the brake system is checked immediately. Contact

the nearest Aston Martin Dealer.

Driving 5.25

ABS Warnings

Warning: If the ABS warning symbol comes ON, you

should be aware that wheels could lock during extreme

braking or when braking on slippery surfaces.

Active Brake Assist

Warning: Active Brake Assist is an aid only and does not

replace the need for driver awareness. It is the driver's

responsibility to be aware of their surroundings. Always

ABS is monitored for correct operation while the ignition is ON. make sure that there is a suitable braking distance for your

vehicle.

If a fault is detected, the

will come ON and the ABS will be

Active Brake Assist is used to reduce the risk of an accidental

collision with a pedestrian or another vehicle. This is achieved by

giving visual and audible warnings when a collision risk is

detected, and, if necessary, will assist in application of the brakes.

If the driver does not react to the risk of a collision, the system can

also automatically apply the brakes.

either partly or fully OFF. Normal braking will continue to

function without ABS.

In the event of an ABS fault, have the braking and ABS systems

checked immediately by an Aston Martin Dealer.

ABS and Electronic Stability Program (ESP) Warnings

Warning: If the ABS and ESP warning symbols come ON,

you should be aware that wheels could lock during extreme

braking or when braking on slippery surfaces. Steering

performance can also function differently and there is

increased risk of skidding and/or accident.

Warning: If the driver does not react, and vehicle is

required to apply the brakes, this will happen for a

maximum of 1.8 seconds. This purpose of the system to gain

the driver's attention to control the vehicle, and reduce the

risk of rear impact from vehicles behind.

and

come ON while driving both ABS and

ESP have a fault. The brake system will continue to operate, but

without assistance from either ABS or ESP. Both front and rear

wheels may lock under heavy braking which can result in longer

braking distances in an emergency stop.

A message will also show in the right instrument cluster

window with further information.

Drive on carefully and have the braking and ABS systems

checked immediately by an Aston Martin Dealer.

5.26 Driving

System Limitations

Brake Pad Conditioning

Active Brake Assist may not function correctly in the below

conditions:

Warning: For track use or high speed driving, new brake

pads must be correctly conditioned. Failure to correctly

condition the pads may result in greatly reduced brake

performance. Contact your Aston Martin Dealer for further

information.

• The area around the multi purpose camera is dirty, damaged

or otherwise covered.

• Glare into the multi purpose camera from the sun or other

road users' headlamps.

• A pedestrian's outline is concealed, or the system cannot

determine a pedestrians outline due the background.

• There is lots of background radar reflection such as a multi-

storey car parks.

• The vehicle in front is either too narrow, such as a motorbike

or the vehicle in front is offset and not following the same

driving line.

When new brake pads are installed the brake rotors and pads

need to be conditioned. During this time, brake performance will

be reduced.

Avoid excessive braking, such as hard stops from high speed and

steep descents, for the first few hundred miles or kilometres₁after

new brake pads are installed.

• A vehicle moves very quickly into range of the radar.

Distances can vary depending on driving conditions and frequency of

brake use

Driving 5.27

Park Brake

The park brake operates on the rear wheels of the vehicle.

Park Brake Operation

Caution: Secure parking of the vehicle is dependent on

being on a hard and stable surface. The rear wheels must be

on a suitable surface to prevent vehicle movement.

Warning: If the brake system warning symbol is ON or

flashing, do not rely on the park brake to hold the vehicle

stationary. Contact your Aston Martin Dealer.

The ignition control must on to release the park brake. First apply

When the vehicle is stationary, push the park brake switch (A) in pressure to the foot brake then pull on the park brake switch and

and release. The warning symbol in the instrument cluster release. The

symbol will go off to show the park brake has

will come on when the park brake is applied. The stop lamps will been released.

not come ON.

Drive Away Release

Warning: Do not exit the vehicle with the engine

operating and the transmission in D (Drive) or R (Reverse).

Always select P (Park) before exiting the vehicle. If the

transmission is left in D (Drive) or R (Reverse) , the vehicle

can overcome the park brake and start to move.

With the park brake applied, select a forward or reverse gear and

press the throttle pedal. The park brake will release as the vehicle

moves forwards or backwards.

The park brake will not release when moving from stationary if a

vehicle door is open. In this case the park brake must be released

with the park brake switch.

5.28 Driving

Tire Pressure Monitoring System (TPMS)

Park Brake Operation While Moving

As an added safety feature, your vehicle has been equipped with

a tire pressure monitoring system (TPMS) that illuminates a low

Warning: Repeated use of the park brake to slow the

vehicle, or driving the vehicle with the park brake applied

can cause serious damage to the brake system.

tire pressure telltale

when one or more of your tires is

significantly under-inflated. Accordingly, when the low tire

pressure telltale illuminates, you should stop and check your tires

as soon as possible, and inflate them to the proper pressure.

Driving on a significantly under-inflated tire causes the tire to

overheat and can lead to tire failure. Under-inflation also reduces

fuel efficiency and tire tread life, and may affect the vehicle's

handling and stopping ability.

In an emergency, push and hold the park brake switch to reduce

speed. The

symbol will come on, a warning sound will be

heard and CAUTION PARK BRAKE APPLIED will be shown in the

right instrument cluster window.

Release the switch to cancel the park brake application whilst the

vehicle is moving. The park brake will only apply as normal once

the vehicle has stopped movement.

Please note that the TPMS is not a substitute for proper tire

maintenance, and it is the driver's responsibility to maintain

correct tire pressure, even if under-inflation has not reached the

level to trigger illumination of the TPMS low tire pressure telltale.

Park Brake Faults

Low Battery Voltage

If the battery voltage is too low, the park brake cannot be put on Each tire, including the spare (if provided), should be checked

or off. Connect an auxiliary battery if the battery voltage is too

low.

monthly when cold and inflated to the inflation pressure

recommended by the vehicle manufacturer (Refer to ’Wheel and

Tire Information’, page 11.15)on the vehicle placard or tire

inflation pressure label (Refer to ’Vehicle Loading’, page 11.22).

System Faults

If a fault in the system is detected, PARK BRAKE MALFUNCTION

will show in the message centre. Contact your nearest Aston

Martin Dealer.

(If your vehicle has tires of a different size than the size indicated

on the vehicle placard or tire inflation pressure label, you should

determine the proper tire inflation pressure for those tires.)

If the battery has been discharged or disconnected, APPLY FOOT

AND PARK BRAKE will show in the message centre when the

ignition is next ON. Press the foot brake down and pull the park

brake switch up to put the park brake ON, this will reset the park

brake system.

Driving 5.29

Driving -> Brakes for Your Aston Martin Dbx SUV 2020

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