Use of the automatic transmission (AT). BMW the 7th E38 series (from 1994 to 2002 release)
 
BMW 7_aya the E38 series from 1994 to 2002
1. Introduction
2. Governing bodies and methods of operation
2.1. Access, protection
2.2. Elements of security systems
2.3. Car equipment, arrangement of devices and governing bodies
2.4. Devices of ensuring comfort
2.5. Methods of operation and auxiliary systems
2.5.1. Start and switching off of the engine, start of motion
2.5.2. Car running in
2.5.3. Use of the automatic transmission (AT)
2.5.4. Brake system
2.5.5. Features of operation of the cars equipped with the catalytic converter
2.5.6. Auxiliary systems
3. Settings and routine maintenance of the car
4. Engine
5. Cooling systems of the engine, heating, ventilation and air conditioning
6. A power supply system and production of the fulfilled gases
7. Systems of electric equipment of the engine
8. Manual box of gear shifting and coupling
9. Automatic transmission
10. Cardan and power shafts, reducer, differential and stupichny assemblies
11. Brake system
12. Suspension bracket and steering
13. Body
14. Onboard electric equipment
15. Schemes of electric equipment



2-5-3-ispolzovanie-avtomaticheskojj-transmissii-at.html

2.5.3. Use of the automatic transmission (AT)

On the considered models AT both with the Steptronic system, and without it can be established. The Steptronic system allows to switch transfers of AT as in the automatic mode, and manually.

The lever of the selector of the AT modes is located in the lower part of the central console, between front seats. AT is controlled by an electronic control unit. The system of adaptive management of transmission (ATC) which is precisely defining style of driving and road conditions, and on the basis of it AT choosing a certain program of management is included in a basic equipment, providing maximum efficiency of transmission.

At malfunction of a control system of AT or AT on the text display in a combination of devices the corresponding message is displayed ("TRANS. FAILSAFE PROG"). In this case it is necessary to stop, transfer the selector lever to situation "P", to cock the parking brake and to switch off the engine. Wait several seconds and again start the engine. If the indicator goes out in several seconds, it will mean that AT restored the working parameters. Otherwise it is possible to continue the movement, but AT will work with restrictions on the 3rd and 4th transfers, – avoid strong loads of the engine and at the first an opportunity address on HUNDRED for repair of AT.

Provisions "P", "R", "N" and "D" of the lever of the selector are available to all AT types. On AT with the Steptronic system provisions "M/S", "+ "and" -", and on AT without the Steptronic system – provisions "4", "3" and "2" are in addition available. Besides, on AT without the Steptronic system the A programs (adaptive/economic), "M" (manual) and "S" (sports) of management of AT are available.

AT has the Kick-down function – decrease in transfer at completely squeezed out accelerator pedal if AT works in the D mode. This function is used for ensuring the maximum acceleration, for example, when overtaking. After that there is a switching to an overgear if only the accelerator pedal is not released until achievement of the maximum speed.

At inclusion of the lowering transfer on the slippery road there is a danger of a drift.

Blocking of the lever of the selector

In front on the handle of the lever of the selector of the AT modes there is a button of removal of blocking of casual switchings of the AT modes. Press the button for moving of the lever of the selector to provisions "P" and "R", and also when switching a lever conclusion from situation "P". Besides, for convertion of the lever from situation "P" in provision of the movement it is required to press a brake pedal.

AT operating modes

"P" (Parking) In this provision of AT is blocked, and back wheels cannot rotate. Before transferring the selector lever to this situation, completely stop the car and press blocking removals the button; at the parking on a bias previously cock the parking brake.

Moving of the lever of the selector to situation "P" at the moving car will cause blocking of wheels and loss of controllability of the car, and also will lead to damage of AT. Do not use situation "P" instead of the parking brake, – they have to be shared.

"R" (The movement by a backing) This position of the lever of the AT selector is used for inclusion of transfer of a backing.

In order to avoid damage of AT before inclusion of transfer of a backing make sure that the car is completely stopped. After inclusion of the R mode wait that transfer was included into gearing (it is felt on draft of the engine).

"N" (Neutral situation) of the Wheel and transmission are not blocked, car can be moved freely.

"D" (Movement) Normal position of the lever of the selector at the movement of the car. AT switches between all transfers of advance, proceeding from an optimum ratio of power and economy of fuel.

"4" and "S" (The fourth transfer and the sports program) This situation is recommended for receiving the maximum return from the car.

"2" and "3" (2nd and 3 transfer) AT switches only between transfers according to 1 on 2 or with 1 on 3. It is used for obtaining bigger draft at the movement on rise, for braking by the engine at the movement on descent, and also for prevention of frequent switchings with 2 on 3 or with 3 on the 4th transfer. The choice of this situation also helps to reduce wheel slip on the slippery road.

"A" the Adaptive program, automatically is chosen at each start of the engine. At the chosen provisions of advance the ATC system automatically defines optimum transfer.

The "M" Manual program, is intended for the movement on one transfer (for example, on the 4th if the M program is chosen in the D mode). AT remains on the chosen transfer both during the movement, and at a start of motion. For example, at the movement on rise at chosen situation "2" AT does not make unnecessary switchings to the raising transfers.

"M/S", "+", "-" the Manual mode and the sports program. When moving the lever of the selector from situation "D" situation "M/S" (to the left) joins the sports mode what the S indicator in a combination of devices testifies to. When moving the lever of the selector forward or back (to situation "+ "or" -") AT passes into the manual mode and combinations of devices turn on the indicator of the current chosen transfer (from M1 to M5).


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2.5.4. Brake system