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Brake system

Car driving

NOTE

The situations listed below indicate a malfunction of the AUTOHOLD function. You must not
Slowly go to an Authorized Mazda Dealer to have the vehicle checked.

The brake pedal indicator (red) began to flash, and at the same time

A message appeared on the multifunction information display and at the same time
The audible warning sounded for approximately five seconds. It happened during
while the AUTOHOLD function is on or when the AUTOHOLD switch is pressed.

If the AUTOHOLD function is on when the engine start switch is set to
OFF, then turning on while standing will occur automatically to provide
parking assistance.

The AUTOHOLD function is deactivated when the reverse gear is engaged if the vehicle is stationary.
on an umbrella surface or on a rise (see illustration below).

; Reversing (selector lever / gear lever in position R

(reverse))

The car is standing

on the descent

Horizontal

surface

The car is standing

on the rise

AUTOHOLD function:
included

AUTOHOLD function:
not working, off

AUTOHOLD function:
not working, off

Activating the AUTOHOLD function

Press the AUTOHOLD switch. The standby indicator of the AUTOHOLD function will turn on
indicate that the AUTOHOLD function is on.

Standby indicator
AUTOHOLD functions

Brake system

Car driving

NOTE

Subject to all the conditions described below
wih indicator standby function
AUTOHOLD lights up when the switch is pressed.
for AUTOHOLD. The AUTOHOLD function is
turns on.


The driver's door is closed.

The AUTOHOLD function is OK.

Using the AUTOHOLD function
and keeping the car in place

1. Depress the brake pedal and come to a complete stop.

those car.

2. AUTOHOLD function enable indicator on

the instrument cluster will light up and
to keep the vehicle in place.

3. Keeping the car stationary

standing is carried out even after releasing
the driver of the brake pedal.

NOTE

If all of the following are met
conditions, the AUTOHOLD function is activated, and
it becomes possible to hold the car.

The engine start button switch was
switched to ON state (engine running
or stopped by the i-stop system).

The car is stopped.

The brake pedal is depressed.

The function enable indicator is on
AUTOHOLD.

Accelerator pedal not depressed.

The driver's seat belt is fastened.

The driver's door is closed.

The AUTOHOLD function is OK.


switched off.

Electric Parking Brake (EPB)
serviceable.

The selector lever is in any position
nii, except for R ( Reverse), or a car
stands on the descent with the selector lever, finding-
in the R (Reverse) position.

Turn off the AUTOHOLD function and start
movement

When the driver performs any of the following
deliberate actions in order to continue the movement
the car will be automatically terminated
smearing brake mechanisms, and indicator
turn off the AUTOHOLD function.


The driver starts to release the clutch pedal.
At the same time, the gear shift lever is not pressed.
is in the neutral position.

(Cars with automatic transmission)

Accelerator pedal depressed.

The car is on the rise, or the car
the bill stands on a horizontal surface with
with the selector lever in the position
nii R (Reverse)

Brake system

Car driving

NOTE

If the driver pulls the switch while standing
electric night brake (EPB)
when the AUTOHOLD function is on,
the AUTOHOLD function is turned off and the
electrically operated parking brake
(EPB). In addition, if the given conditions
the parking is switched off.
electric brake (EPB) function
AUTOHOLD turns on to hold auto
the mobile in place.

Under the conditions listed below, the parking
electric brake (EPB) is applied
automatically, and the AUTOHOLD function is
turns on. The AUTOHOLD function will turn on
again, when conditions are restored, pre-
marching her off.

The driver's seat belt is unfastened.

The driver's door is open.

After about ten or
more than minutes after the start of the function
AUTOHOLD automatically turns on
electric parking brake (EPB).
Since the AUTOHOLD function
restarted when you turn off the parking
electric brakes (EPB), then
AUTOHOLD function
on vehicle hold will also resume.

(Cars with manual transmission)
To start moving forward or
back on a downhill vehicle,
depress the clutch pedal, move the lever
shifting gears to the appropriate
and then press the accelerator pedal
to turn off the AUTOHOLD function.

Switching off the AUTOHOLD system

The car is in motion

Press the AUTOHOLD switch to turn off
AUTOHOLD function (mode indicator
standby for the AUTOHOLD function goes off).

Car is being held

Depress the brake pedal and press the off-
AUTOHOLD dial to turn off the
AUTOHOLD (standby indicator)
AUTOHOLD, as well as an indicator on the combination
instruments will go out in this case).

AUTOHOLD standby indicator

Brake system

Car driving

NOTE

(Applicable to cars,
not equipped with multifunctional information
display)
If the AUTOHOLD switch is pressed
without depressing the brake pedal when
the AUTOHOLD function is on (the
AUTOHOLD standby mode
lights up), then on the instrument cluster lights up
pedal required indicator
brake (green), notifying the driver of
that you must press the brake pedal.

(Green)

(Applicable to vehicles equipped with
multifunctional information
display)
If pressing the AUTOHOLD switch
carried out without pressing the brake pedal
when the AUTOHOLD function is on
(AUTOHOLD ON indicator
lights up on the instrument cluster), then a lot
a message appears on the function display.
release the parking brake by pressing
brake pedal "(Depress Brake Pedal to Release
Parking Brake), notifying the driver about
the need to press the brake pedal.

NOTE

In the event of the occurrence of any of the listed
conditions below when the function is enabled.
AUTOHOLD (function enable indicator
AUTOHOLD lit) parking brake with
electric actuator (EPB) is switched on automatically
and the AUTOHOLD function is turned off.
More information on standing work-
electric night brake (EPB)
See page 4-90 (Parking brake with
Electric Drive (EPB) ").

Engine start switch switched
to the OFF state.

The AUTOHOLD function is defective.

The parking brake is an important and necessary structural element of a car. With its help, the car is fixed in place during the parking period, and spontaneous rollback of the vehicle is also prevented. The classic layout of the parking brake is mechanical, with a cable system and a control lever, but in modern cars the use of an electromechanical unit with the auto hold function is becoming more frequent. Parking brake with auto hold - what is it and how does it work?

Auto Hold brake functions

Electromechanical vehicle brakes are often referred to as EPBs in foreign car manuals. The acronym is revealed as Electromechanical Parking Brake. Its functions:

  • fixing the car when parked;
  • prevention of rollback in a stationary state, as well as when starting from a slope;
  • emergency braking if the main braking system does not work for some reason.

Vehicles equipped with an electromechanical brake are equipped with an interior activation button, designated Auto Hold. An example of such a button:

Sometimes there is another image - a “handbrake” pictogram with the letter A inscribed in it:

Module device

General structure

An electromechanical brake is usually placed on the rear axle. It includes:

The brake mechanism is activated standard for a specific car. Some structural modifications are made to the working cylinders, and an electromechanical drive is mounted on the support.

The wheel mechanism of an electromechanical parking brake can be depicted schematically as follows:

Number 1 denotes a piston, 2 denotes an electric motor, number 3 in the figure shows a drive belt, and 4 denotes a gearbox.

Gearbox device:

Legend:

  • number 1 - driven gear of the unit;
  • number 2 - the output shaft of the device;
  • number 3 - designates the pulley hub;
  • number 4 - the pulley itself;
  • number 5 is a schematic representation of the engagement of the teeth of the oscillating and driven gears.

The swinging gear is an important structural element. It is mounted on the hub at a certain angle. This provides it with the ability to swing, and two special leashes protect the gear from full rotation in relation to the housing. When movement occurs, two teeth of this gear meshes with the driven one, while, due to the difference in the number of teeth, the engagement is not complete. The revolution of the pulley displaces the driven gear by only one tooth.

A gear belt drive connects the motor to the gearbox. The latter significantly reduces the speed at which the output shaft rotates, which allows the system to develop the necessary force for the brake to function.

Next important element- a piston with a special screw pair, consisting of the actual piston brake cylinder(1), compression nut (2) and spindle (3):

The rotation of the driven gear is converted into a forward stroke of the stem due to the helical pair. The rod puts pressure on the piston, which moves the pads towards the rim. The generated pressure force is determined by the ECU of the electromechanical vehicle brake, guided by the readings of the value of the electric current consumed by the system. The drive motor will shut off when the current reaches the programmed value.

If the car is removed from the previously set "handbrake", the motor will rotate in the opposite direction and move the stock, removing braking force.

Auto hold

Some car models are equipped with an auto hold function activated by pressing the Auto Hold key. This is an extension of the logic of the electromechanical brake: the brake pads continue to compress the discs even after the brake pedal is released.

Functioning principle

The Auto Hold function has become standard for a number of Volkswagen cars (VW Touareg, VW Tiguan, VW Passat, VW Golf families), Korean KIA, BMW, and some others. In its work, this system relies on the readings of many sensors:

  • the slope analyzer on which the vehicle is located:
  • the position of the accelerator and (for manual gearboxes) the clutch pedal;
  • evaluating the speed of releasing the pedal;
  • estimating the speed of the car if the vehicle is moving.

All this is needed to timely turn on and off the brake.

In general, the system works like this:

  • the driver applies the brake and presses the Auto Hold button. The ECU activates the system and enters the standby state;
  • when the car comes to a complete stop, the system goes into active mode, and even when the brake pedal is released, the vehicle remains stationary;
  • if the car owner turns on the EPB, the Auto Hold module will go into a standby state.

In cars of the Volkswagen concern, AutoHold has several sub-functions:

  • spot start assistant;
  • motion assistant in Stop-n-Go mode;
  • autoactivation of the electromechanical brake.

By removing his foot from the brake pedal, the driver no longer gives the command to lock the wheels with the brakes, but the pressure in the line continues to be maintained. If the ABS detects a downhill movement (tilt sensors, rolling sensors, etc.), the ECU brake system gives the command to increase the pressure until a stop occurs. Then, when the driver engages the clutch (for "mechanics") or adds gas (for "automatic"), Auto Hold will remove the braking force.

In the parking mode, the system switches from hydraulic brakes to the electromechanical part 3 minutes after starting to hold the machine, when unfastening the belt, turning off the engine ignition or opening the doors.

Other models may have different features of this mode.

Turn off Auto Hold by pressing the corresponding button again.

Working conditions

"Auto hold" is activated when several conditions are met (may differ for different models machines of a certain manufacturer):

  • the driver's door is closed;
  • the seat belt is fastened;
  • the vehicle engine is running;
  • the Auto Hold key on the panel is pressed.

The electric parking brake is activated when:

  • the function is enabled from the key;
  • the engine ignition is turned off;
  • the door on the driver's side is open;
  • the belt is unfastened.

A number of car brands and models require re-enabling autohold after re-starting the engine. In other situations, the function works all the time until the engine is started, for example, in the VW Golf 2.

To keep the vehicle standing on a slope, the system needs to create high pressure in the brake lines. If the driver wishes to drive away in this case, the pressure must be overcome to start driving. The brake is released by the control unit only when the engine reaches the required power to prevent rolling.

The system does not enter auto-hold mode:

  • if the driver's belt is not fastened and the door on his side is not closed;
  • the trunk is open;
  • the hood will open;
  • the automatic transmission selector is moved to the Parking position;
  • the electromechanical parking brake is active.

The latter turns on independently when:

  • open trunk, hood;
  • sensors detected a parking lot on a slope;
  • the driver's door is open, the seat belt is not fastened;
  • there have been several movements of the vehicle;
  • the machine is stationary for 3 to 10 minutes.

Advantages of Auto Hold brakes and disadvantages of the system

The electromechanical brake system with the optional Auto Hold extension has a number of significant advantages:

  • the car owner experiences less stress when operating the vehicle. This is especially important in urban driving mode, with traffic jams and frequent acceleration-stopping cycles, because you no longer need to constantly keep the brakes pressed;
  • "Autohold" helps to stop and start moving on slopes, the car does not roll;
  • support of the control unit automatically keeps the car in one place, while there is no difference why the car stopped;
  • the programmed mode of turning on the parking electric brake when the driver's door is opened, the belt is unfastened, the engine is muffled, provides additional safety for people;
  • activation is provided by a convenient button that replaces the bulky and inconvenient lever;
  • the electric brake does not need to be adjusted during normal operation, the system turns off automatically (the situation "forgot to remove the handbrake" is excluded).

But there are also some disadvantages. Among those:

  • you cannot control the degree of brake force, which is available with a mechanical "handbrake";
  • if the battery is completely discharged, it is impossible to remove the car from the electric handbrake until the charge is replenished;

It is impossible not to mention, speaking of Auto Hold, that such a solution is more expensive, increasing the price of the car. Including the higher the cost of repairing a failed brake unit.

Precautionary measures

If you intend to move away with active automatic hold (press the gas pedal), you need to depress the pedal carefully, gradually increasing the speed so that the start-off is smooth, without jerks. It is also advisable to disable this mode when driving downhill, when driving backward and parking.

If a malfunction is found, or the system does not work properly, you should contact an authorized service center for appropriate diagnostics and repair of the complex electronic unit.

Do not keep a car equipped with this system with the parking brake applied for too long. The block consumes the battery charge, and if it is completely depleted, the car will not be removed from the parking brake just like that.

When service and repair work is carried out, the electronics of the machine must be put into service mode. If this is not done, the brake can be applied during work, which, in turn, will lead to damage to the vehicle and personal injury. All service operations, including the replacement of pads, should be carried out on specially designed equipment.

motoran.ru

Technical features and purpose of the HOLD button on the automatic transmission


Having bought a car with an automatic transmission, novice motorists notice the HOLD button, but not everyone is in a hurry to try a special automatic transmission mode. This mode itself is the beginning of the movement not from the first, but immediately from the second gear. This helps to avoid slipping when starting on slippery surfaces. It would seem very functional in some situations, especially in cold seasons, but nevertheless the use of this button causes controversy among drivers.

If you literally translate HOLD from English, you get "fixation", "hold". This function, as it were, limits the range of speeds, limiting the inclusion of higher or lower ones. You can see the designation of the button in the form of a snowflake, an asterisk.

This button has its own nuances. It is almost always located near the automatic transmission, but you can find it on the dashboard of some brands and individual models cars. When you click on the table, the speedometer will light up the corresponding inscription. It is also worth mentioning that the use of the HOLD button increases the consumption of gasoline, therefore it is recommended to disable this function during normal driving. Despite the consumption of gasoline, the function has enough advantages.

She will help provide assistance in situations such as:

  • downhill movement. When this button is pressed, the car will brake and will not be able to accelerate.
  • overtaking another car, because at a sufficiently high speed, that is, in fourth gear, the engine speed increases sharply when HOLD is turned on and the thrust increases.
  • cold seasons and slippery roads. In this case, it is recommended to keep the HOLD button on at all times.
  • traffic jams. Starting immediately in second gear will reduce the number of jerks in heavy traffic.
  • climbing up a slippery road.

It should also be borne in mind that the inclusion of the HOLD button slows down the car, does not allow it to accelerate to high speeds. Here, each car has its own limitations. Therefore, using this button on the track (with the exception of winter times) does not make sense and only interferes with your, as well as the general movement.

novosibirsk.spec-akpp.ru

Mazdovoda links - virtual MazdaFaq

Answers to the most frequently asked questions (FAQ), MAZDA conference.

Transmission: Automatic transmission HOLD button. On my 626 there is such a button, but what it does is not clear. I did not have time to check it empirically. the car is going with a net from Vladik. Is it like overdrive or something else? When this button is pressed, the box does not switch either up or down from the speed at which it was at the moment of pressing ... The HOLD button does the following. Disables the highest gear that is possible at this position of the automatic transmission selector. Let me explain: if you go to D, then the machine will switch 1-2-3-4, if you press HOLD, then 1-2-3, similarly to S (1-2-3 and 1-2 with HOLD) and L (1 -2 and 1 s HOLD). It is very convenient to use in winter for engine braking. If HOLD is flashing, it means that there is a malfunction in the box. Sometimes flashing can start for no apparent reason and without any change in the operation of the box itself. This can be overcome by resetting the entire computer. Disconnecting the battery for a while (about half an hour). Now about the differences between the boxes "Europe" from "America" ​​626. On the "Europe" there is a so-called 2-pallet box, in which the automatic transmission filter can be changed (and should be). On "America" ​​there is a one-pallet box, the filter in which does not change (such a construct). The oil change intervals for both are the same and under normal conditions it is 60 t km, and under heavy (read our conditions) 40 tkm. Better to pour Dextron-III (normal manufacturer !!!). Fedor.AKP I've been driving for more than a year now, but I can't understand what the Power / Eco switch gives. I know theoretically, I hardly feel it. Those. nothing changes at all. Maybe I don't understand its purpose. 1. With Power On, gear shifting occurs when more high revs with the same pressure on the gas. If you press hard with Power Off, then it works as with Power On. Make sure - press gently - should switch at 2000 rpm with power off. When the Hold key is pressed, the 4th gear is disengaged, the car starts from the 2nd gear (for driving on ice or in the sand to reduce the moment on the wheels). In addition, the machine "tries" to keep the current gear as long as possible. TE increases the hysteresis. 2. It's a little different for me - OVERDRIVE ON / OFF modes. When switched on (ON), the transmission turns from 4-speed to 3-speed, while the gears are slightly lengthened. By the way about the OVERDRIVE button - according to the dictionary - mechanism in a vehicle providing a gear above top gear for economy at high speeds (vehicle mechanism, which is an overdrive to save fuel at high speeds). I bought a new "Behind the wheel" today. There is an article there about the automatic transmission, where I read that the machine easily breaks down if the car is towed differently than with the drive wheels hung out on the tow truck. Is this really so, or is it still possible to get in tow somehow? it is not recommended to tow a car with an automatic transmission due to the fact that the oil pump does not work and there is no lubrication of the mechanisms. But manufacturers allow transportation at a distance. about 50 km and at speeds up to 50 km / h. Repair firms recommend adding oil to the box, which will allow transport over long distances. : Tell me, plz, maybe someone already knows where to look for automatic transmission error codes on Mazda and other cars (URL pls) At http://www.jnc.farpost.com/toytech.html see http: //www.jnc .farpost.com / data / a340e.zip 626 2.0i FS since 1991 Hatch (AlexR) Contrary to Oleg's advice "do not touch", changed the oil in a specialized Castrol service station. The level was not determined (below the gears), so I decided. The local specialists looked in smart catalogs and identified a 75W90 transmission castrol for my Mazda. But I had some kind of ATP (red) there. After that, according to my subjective feelings, gear shifting became hard. At high revs, when switching from the first to the second (the most difficult synchronization mode), the lever moves with difficulty and with an unpleasant sound. The synchronizer seems to be failing. I had a similar experience with old oil, but only on a cold box. I changed it to ATF (Mobil). All questions have been cleared. If there was ATF, then I strongly advise you not to pour 70W90! In winter, synchronizers will not work on a cold box! we passed it. It never gets so cold in Europe, and their 70W90 works fine, so sometimes there are such recommendations in Mazda oil catalogs. But for us in Russia - only ATF (Dexron II / III)!

mazda.narod.ru

Key Master slot machine

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Key Master slot machine

Last games These pages show images of games and the following parameters: game - game number (the last game has a number 0, the previous one is 1.d.). MM - day and month of this game HH: MM - hours and minutes of this game BET - bet per line in this game line - number of lines on which the Key Master slot machine was placed credit - credit value after the end of the game WIN - amount line wins and winnings in the bonus bonus.

Key Master slot machine

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Key Master slot machine

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Pin assignment of connectors Master Games CON2 component side solder side video RED 1A 1B video green video blue 2A 2B video sync. In this case, all data on all test pages will be reset to zero, the data on the preferences pages will take the initial values ​​(see.

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The parking brake is an important and necessary structural element of a car. With its help, the car is fixed in place during the parking period, and spontaneous rollback of the vehicle is also prevented. The classic layout of the parking brake is mechanical, with a cable system and a control lever, but in modern cars the use of an electromechanical unit with the auto hold function is becoming more frequent. Parking brake with auto hold - what is it and how does it work?

Auto Hold brake functions

Electromechanical vehicle brakes are often referred to as EPBs in foreign car manuals. The acronym is revealed as Electromechanical Parking Brake. Its functions:

  • fixing the car when parked;
  • prevention of rollback in a stationary state, as well as when starting from a slope;
  • emergency braking if the main braking system does not work for some reason.

Vehicles equipped with an electromechanical brake are equipped with an interior activation button, designated Auto Hold. An example of such a button:

Sometimes there is another image - a “handbrake” pictogram with the letter A inscribed in it:

Module device

General structure

An electromechanical brake is usually placed on the rear axle. It includes:

  • brake mechanism;
  • brake drive;
  • and a controlling system.

The brake mechanism is activated standard for a specific car. Some structural modifications are made to the working cylinders, and an electromechanical drive is mounted on the support.

The wheel mechanism of an electromechanical parking brake can be depicted schematically as follows:

Number 1 denotes a piston, 2 denotes an electric motor, number 3 in the figure shows a drive belt, and 4 denotes a gearbox.

Gearbox device:

Legend:

  • number 1 - driven gear of the unit;
  • number 2 - the output shaft of the device;
  • number 3 - designates the pulley hub;
  • number 4 - the pulley itself;
  • number 5 is a schematic representation of the engagement of the teeth of the oscillating and driven gears.

The swinging gear is an important structural element. It is mounted on the hub at a certain angle. This provides it with the ability to swing, and two special leashes protect the gear from full rotation in relation to the housing. When movement occurs, two teeth of this gear meshes with the driven one, while, due to the difference in the number of teeth, the engagement is not complete. The revolution of the pulley displaces the driven gear by only one tooth.

A gear belt drive connects the motor to the gearbox. The latter significantly reduces the speed at which the output shaft rotates, which allows the system to develop the necessary force for the brake to function.

The next important element is a piston with a special screw pair, consisting of the actual brake cylinder piston (1), a pressure nut (2) and a spindle (3):

The rotation of the driven gear is converted into a forward stroke of the stem due to the helical pair. The rod puts pressure on the piston, which moves the pads towards the rim. The generated pressure force is determined by the ECU of the electromechanical vehicle brake, guided by the readings of the value of the electric current consumed by the system. The drive motor will shut off when the current reaches the programmed value.

If the car is removed from the previously set "handbrake", the motor will rotate in the opposite direction and retrace the stem, removing the braking force.

Auto hold

Some car models are equipped with an auto hold function activated by pressing the Auto Hold key. This is an extension of the logic of the electromechanical brake: the brake pads continue to compress the discs even after the brake pedal is released.

Functioning principle

The Auto Hold function has become standard for a number of Volkswagen cars (VW Touareg, VW Tiguan, VW Passat, VW Golf families), Korean KIA, BMW, and some others. In its work, this system relies on the readings of many sensors:

  • the slope analyzer on which the vehicle is located:
  • the position of the accelerator and (for manual gearboxes) the clutch pedal;
  • evaluating the speed of releasing the pedal;
  • estimating the speed of the car if the vehicle is moving.

All this is needed to timely turn on and off the brake.

In general, the system works like this:

  • the driver applies the brake and presses the Auto Hold button. The ECU activates the system and enters the standby state;
  • when the car comes to a complete stop, the system goes into active mode, and even when the brake pedal is released, the vehicle remains stationary;
  • if the car owner turns on the EPB, the Auto Hold module will go into a standby state.

In cars of the Volkswagen concern, AutoHold has several sub-functions:

  • spot start assistant;
  • motion assistant in Stop-n-Go mode;
  • autoactivation of the electromechanical brake.

By removing his foot from the brake pedal, the driver no longer gives the command to lock the wheels with the brakes, but the pressure in the line continues to be maintained. If the ABS detects a downhill movement (tilt sensors, rolling sensors, etc.), the brake ECU will command an increase in pressure until a standstill occurs. Then, when the driver engages the clutch (for "mechanics") or adds gas (for "automatic"), Auto Hold will remove the braking force.

In the parking mode, the system switches from hydraulic brakes to the electromechanical part 3 minutes after starting to hold the machine, when unfastening the belt, turning off the engine ignition or opening the doors.

Other models may have different features of this mode.

Turn off Auto Hold by pressing the corresponding button again.

Working conditions

"Auto hold" is activated when several conditions are met (may differ for different models of cars of a certain manufacturer):

  • the driver's door is closed;
  • the seat belt is fastened;
  • the vehicle engine is running;
  • the Auto Hold key on the panel is pressed.

The electric parking brake is activated when:

  • the function is enabled from the key;
  • the engine ignition is turned off;
  • the door on the driver's side is open;
  • the belt is unfastened.

A number of car brands and models require re-enabling autohold after re-starting the engine. In other situations, the function works all the time until the engine is started, for example, in the VW Golf 2.

To keep the vehicle standing on a slope, the system needs to create high pressure in the brake lines. If the driver wishes to drive away in this case, the pressure must be overcome to start driving. The brake is released by the control unit only when the engine reaches the required power to prevent rolling.

The system does not enter auto-hold mode:

  • if the driver's belt is not fastened and the door on his side is not closed;
  • the trunk is open;
  • the hood will open;
  • the automatic transmission selector is moved to the Parking position;
  • the electromechanical parking brake is active.

The latter turns on independently when:

  • open trunk, hood;
  • sensors detected a parking lot on a slope;
  • the driver's door is open, the seat belt is not fastened;
  • there have been several movements of the vehicle;
  • the machine is stationary for 3 to 10 minutes.

Advantages of Auto Hold brakes and disadvantages of the system

The electromechanical brake system with the optional Auto Hold extension has a number of significant advantages:

  • the car owner experiences less stress when operating the vehicle. This is especially important in urban driving mode, with traffic jams and frequent acceleration-stopping cycles, because you no longer need to constantly keep the brakes pressed;
  • "Autohold" helps to stop and start moving on slopes, the car does not roll;
  • support of the control unit automatically keeps the car in one place, while there is no difference why the car stopped;
  • the programmed mode of turning on the parking electric brake when the driver's door is opened, the belt is unfastened, the engine is muffled, provides additional safety for people;
  • activation is provided by a convenient button that replaces the bulky and inconvenient lever;
  • the electric brake does not need to be adjusted during normal operation, the system turns off automatically (the situation "forgot to remove the handbrake" is excluded).

But there are also some disadvantages. Among those:

  • you cannot control the degree of brake force, which is available with a mechanical "handbrake";
  • if the battery is completely discharged, it is impossible to remove the car from the electric handbrake until the charge is replenished;

It is impossible not to mention, speaking of Auto Hold, that such a solution is more expensive, increasing the price of the car. Including the higher the cost of repairing a failed brake unit.

Precautionary measures

If you intend to move away with active automatic hold (press the gas pedal), you need to depress the pedal carefully, gradually increasing the speed so that the start-off is smooth, without jerks. It is also advisable to disable this mode when driving downhill, when driving backward and parking.

If a malfunction is found, or the system does not work properly, you should contact an authorized service center for appropriate diagnostics and repair of the complex electronic unit.

Do not keep a car equipped with this system with the parking brake applied for too long. The block consumes the battery charge, and if it is completely depleted, the car will not be removed from the parking brake just like that.

When service and repair work is carried out, the electronics of the machine must be put into service mode. If this is not done, the brake can be applied during work, which, in turn, will lead to damage to the vehicle and personal injury. All service operations, including the replacement of pads, should be carried out on specially designed equipment.

Novice car enthusiasts, not understanding the purpose of the HOLD button, prefer not to turn on the special operation mode of the "machine". The nuances of using the button's capabilities are interpreted by many drivers in their own way, causing controversy in automotive forums.

Technical features of the HOLD button

The purpose of the button is clear from the translation of the function name into Russian (from English HOLD translates as "fixation", "hold"). The function limits the range of speeds used by the automatic transmission in difficult conditions. Such modes of automatic transmission for imported brands can be designated by an "asterisk", "snowflake".

Structurally, the activation of the mode gives a command to the electronic control unit of the automatic transmission to limit the inclusion of lower or higher speeds. The main function of the mode, starting off at second speed (excluding the first), is designed to prevent slipping during a soft start on slippery surfaces.

The nuances of using a special automatic transmission mode

The button for the special operating mode of the automatic transmission for various models is located on the gear selector, next to it, on the center console "torpedo". Pressing the button is accompanied by the display of the same inscription on the computer screen (indicator of automatic transmission modes, speedometer dial).

To use the special mode correctly, you need to carefully read the manual of your car. Experienced drivers use the Hold button in a variety of situations. Starting off in second gear is used in winter on snowy, ice cover. After shifting to third gear, the transmission does not change to higher speeds. The property of a button to enable the locking mode while driving is used:

  • when climbing up on slippery slopes;
  • when braking the engine on slopes;
  • when overtaking;
  • in traffic jams.

Standard designation of driving modes for European and Japanese models provides a combination of basic modes with the HOLD button. The S + HOLD combination is used on long descents for engine braking, the mode works in second gear. D + HOLD mode is used when driving in traffic jams, driving slowly in heavy traffic.

Gas consumption increases when the HOLD button is used, therefore the instructions recommend disabling the function during normal driving (except winter use). Expensive models have automatic shutdown functions.

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