Subaru Forester

1997-2005 of release

Repair and car operation



Subaru Forester
+ Cars Subaru Forester
+ The maintenance instruction
+ Routine maintenance
+ The engine
+ Systems of cooling, heating
+ The power supply system and release
+ Engine electric equipment
+ Control systems of the engine
- Gear change box
   + 5-step manual box of a gear change (РКПП)
   - 4-step automatic transmission (АТ)
      The general information and functioning principle
      Problem diagnostics АТ - the general information
      Adjustments АТ
      Electrohydraulic control system АТ, - the general information, appointment of basic elements
      Self-diagnostics system, reading of codes of malfunctions
      Removal and installation АТ
+ Coupling, трансмиссионная a line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
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Electrohydraulic control system АТ, - the general information, appointment of basic elements

The structure of electrohydraulic control system АТ includes various gauges and switches, the electronic block of management (TCM), клапанная assemblage and the complete set of electromagnetic switches.

The system exercises administration of gear change АТ, hydrotransformer blocking, муфтой maintenance of a mode of braking with the engine, pressure in the basic highway, муфтой managements of a back drive. In other words, system, analyzing the information arriving from gauges, traces changes of parametres of movement and gives out corresponding commands on six electromagnetic valves: 1, 2, 3, And, In and With.

The gauge of position throttle заслонки (TPS) serves for definition of degree of opening throttle заслонки. On the basis of arriving from TPS information TCM defines the moments of a gear change and hydrotransformer blocking, and also forms pressure in the basic highway.

The gauge of speed of movement of the car № 1 (VSS 1) is established in картере АТ and used at definition of speed of movement of a vehicle. On the basis of the analysis of information TCM arriving from the gauge defines the moments of a gear change and hydrotransformer blocking, and also forms pressure in the basic highway. АН all-wheel drive models the drum муфты a back drive by means of карданного a shaft is connected directly to back wheels, therefore VSS 1 defines speed of rotation of back wheels.


The gauge of speed VSS 2 is used for management муфтой a drive of back wheels, besides, duplicates functions VSS 1 on a case of an exit of the last out of operation.

The gauge of turns of the engine serves for definition of frequency of rotation of the engine. Signals given out by the gauge are used at management of hydrotransformer blocking.

The gauge of position of the lever of a choice of ranges of the AT/PERMISSION of start allows TCM to define position of the lever of a choice of ranges of transmission. On the basis of the analysis of information TCM arriving from the gauge carries out pressure formation in the basic highway. Besides, the gauge provides safety of start of the engine, forbidding performance of the last in distinct from “N” and “Р” positions of transmission at the expense of disconnection of a chain of a starter.


The gauge-switch of full closing throttle заслонки serves for definition of a mode of full closing throttle заслонки and is used TCM at management of functioning blocking муфты the hydrotransformer and pressure formation in the basic highway.

The switch темпостата (at a corresponding complete set of the car) is intended for inclusion/deenergizing of a control system by speed if that enters into a vehicle complete set.


The gauge-switch of temperature ATF allows TCM to trace continuously temperature трансмиссионной liquids, using the arriving information at hydrotransformer blocking. The gauge is термистор which resistance in inverse proportion to temperature ATF.

The target characteristic of the gauge.
1  — the  Gauge of temperature ATF


The manual switch allows to forbid inclusion of 4th transfer at movement on impassability.

The switch of installation of an economic mode of movement is used on in appropriate way the equipped models for switching-off of a back drive.

The mode gauge-switch kickdown notifies TCM on full squeezing of a pedal of gas and necessity of transition to a hill-climbing gear for the purpose of short-term increase of return of the engine, for example at overtaking.

Electromagnetic valves of switching АТ


1  — the  Electromagnetic valve And pressure adjustments in the basic highway
2  — the  Electromagnetic valve 2
3  — the  Electromagnetic valve 1
4  — the  Electromagnetic valve of 3 managements of a mode of braking by the engine
5  — the  Electromagnetic valve In managements of hydrotransformer blocking

 


Electromagnetic valves of switching. Electromagnetic valves of switching 1 and 2 are established in клапанной to assemblage and, depending on character arriving on them from the module of management of a signal, can occupy one or the other fixed positions: It is included (ON) or It is switched off (OFF). The combination of conditions of the given electromagnetic valves defines the transfer chosen in a box. The electromagnetic valve 3 serves for management муфтой braking by the engine, also is a part клапанной of assemblage) and can be in one of two fixed conditions (ON or OFF). The electromagnetic valve And is used at management of pressure in the basic highway, established in клапанной to assemblage, is the managing director оп to the relation to valves of updating and adjustment of pressure by means of given valve TCM forms pressure in the basic highway, most effectively answering to current inquiries of the power unit. The electromagnetic valve In allows TCM to exercise administration of functioning blocking муфты the hydrotransformer.

The electromagnetic valve of management of functioning муфты inclusions of a back drive


1  — the  Electromagnetic valve From management of functioning муфты inclusions of a back drive

 


The electromagnetic valve With is established in клапанной to assemblage and, on in appropriate way the equipped models, used TCM at management of functioning муфты inclusions of a back drive. The means of given valve TCM exercise administration of functioning of the distributive valve forming pressure in бустере муфты of a back drive.

TCM. On the basis of the analysis of signals arriving from various gauges the block of management of transmission defines traffic conditions of a vehicle and develops corresponding commands on management of transmission switchings.

The indicator a lamp of a mode of functioning of transmission. Control system АТ is allocated by function of an automatic choice of one of two modes of movement: the normal mode used at usual service conditions and a mode of raised selection of capacity of the engine. Last mode is used at movement uphill, and also joins at sharp squeezing of a pedal of gas. Modes of functioning of the indicator are shown in the table presented more low.

Position of the lever of the selector of a range

Switching from a normal mode on a mode of the raised selection of capacity

Mode of functioning of the indicator

“D”, “3”, “2” Gets out automatically according to character of use of a pedal of gas The normal: ВЫКЛ (OFF)
The raised selection of capacity: ВКЛ (ON)