1999-2003 of release
Repair and car operation
Subaru Legasi, Autbek
+ Cars Subaru Legacy, Outback
+ The operation manual
+ Routine maintenance
+ The engine
+ Systems of cooling, heating
+ The power supply system and release
+ Engine electric equipment
+ Manual box and differential
- Automatic transmission
Electrohydraulic control system - the general information, appointment of basic elements
Self-diagnostics system - the general information and functioning principles
Diagnostics of general condition АТ
Problem diagnostics АТ
Removal and installation трансмиссионной assemblages
Replacement of elements of a suspension bracket трансмиссионной assemblages
Replacement of an epiploon of a casing of lengthening АТ
Condition check, adjustment and replacement of the gauge-switch of the permission of start
Removal and installation of the forward gauge of speed (VSS)
Removal and installation of the back gauge of speed (VSS)
Removal and installation of the gauge of turns of the turbine of the hydrotransformer
Removal, service and installation клапанной assemblages
Replacement of electromagnetic valves of switching, executive electromagnetic valves and the gauge of temperature ATF
Filter ATF replacement
Removal and installation of the module of management of transmission (TCM)
Removal, installation and check of a condition of lines of a path of cooling ATF
Removal, service and installation of components of the lever of selector AT
Removal, installation, check of a condition and adjustment drive selector AT cable
+ Brake system
+ Suspension bracket and steering
+ Onboard electric equipment
Diagnostics of general condition АТRefusals АТ occur on one of following five reasons more often:
a) Decrease in efficiency of return of the engine;
b) Infringement of adjustments;
c) Malfunction of hydraulics;
d) Mechanical damages;
e) Refusals of the onboard processor / its alarm chain.
The problem diagnostics always should begin with the most simple checks: estimate level and condition ATF (Routine maintenance see the Head), check up adjustment of drives of a gear change and throttle заслонки. Further, spend trial runs of the car for the purpose of definition of efficiency of the brought corrections. If to eliminate a problem it was not possible, it is necessary to drive away the car on a car repair shop for more detailed diagnostics with application of the special equipment. The description of infringements of functioning АТ some of symptoms is resulted in the Section devoted to a problem diagnostics of knots and systems of the car in the beginning of the present Management.
Diagnostics of leaks ATF
The general information
The majority of leaks easily come to light at visual check. Repair usually consists in replacement of a corresponding defective epiploon or a lining. If to reveal a source of leak during external survey it is not possible, operate, as it is described more low.
First of all it is necessary to exclude probability of an error in definition of the nature of leak. It is not necessary to confuse ATF to impellent oil or a brake liquid (трансмиссионная the liquid usually has dark red colour).
For revealing of a source of leak make short (some kilometres) a trip, then park the car over the spread blank leaf of a cardboard. After pair minutes the leak source can be revealed in the wake of a liquid dripping on a cardboard.
Attentively examine a suspected site and a surface surrounding it, giving particular attention to joints interfaced прокладочных surfaces. For the purpose of expansion of a corner of the review take advantage of a pocket pocket mirror.
If to reveal a leak source still it is not possible, carefully wipe a surface of a suspected site the rags moistened with solvent, then dry it.
Make one more short trip, this time often changing speed of movement, then again examine the cleaned suspected site.
After revealing of a source of leak, it is necessary to define and eliminate the reason of its development, and only then to pass to performance of a necessary recovery work. Replacement of the damaged lining will not lead to desirable result if the defect of the interfaced surface which have led to an exit of a sealant out of operation (so is not eliminated also, the deformed flange it is necessary отрихтовать).
In below-mentioned subsections the most typical reasons of development of leaks ATF and conditions which should be executed that there were no relapses are listed.
Leaks through прокладочные surfaces
Periodically examine the pallet картера transmissions. Check presence on the places and reliability of a tightening of fixing bolts, watch, that on a cover there were no traces of mechanical damages (pallet deformation can lead to failure located in transmission клапанной assemblages).
Excessively hard tightening of fixing bolts, infringement of passableness of a ventilating line, mechanical damage of a sealing surface concern number of the possible reasons of development of leaks through the pallet картера transmissions, lining destruction, and also occurrence of cracks or порозности walls картера. If the lining of the pallet or картера transmissions is formed by a hermetic pillow, the probability of a wrong choice of type of the last is not excluded. Overflow can result in leaks чрез картера трансмиссионной a liquid, or increase of pressure ATF a pallet lining also.
Leaks through epiploons and cuffs
Excessively high level/pressure ATF, infringement of passableness of a ventilating branch pipe, mechanical damage of walls of a landing nest, damage out of operation concern number of the most typical reasons of an exit of epiploons of transmission actually an epiploon, or wrong installation of the last. The probability of damage of a pin of the shaft passed in an epiploon, or excessive люфт the last as a result of deterioration of bearings is not excluded also.
Check up a condition and correctness of landing of a sealing cuff of a directing tube measuring probeа. Periodically examine on presence of signs of leaks a surface around an arrangement of gauges of speed (VSS). In case of need make replacement of the failed sealing ring.
Leaks through defects in walls картера transmissions
The reason of development of leaks ATF formation of cracks or a time in a body картера transmissions can be, - consult at experts of car-care centre.
Check up tightness штуцерных knots of connection of hoses of cooler ATF.
Leaks through сапун and a jellied mouth
Leaks through сапун ventilation or a jellied mouth can occur owing to overflow of transmission, hit in ATF a cooling liquid, passableness infringement sapuna / a ventilating branch pipe or returnable drainage apertures.
Trial runs are necessary for correct diagnostics of condition АТ.
There are two ways of carrying out of trial runs. In the first case at the wheel a vehicle there should be personally an owner of the car that will allow checking to make sure of adequacy of skills of its driving to standard requirements by the gear change moments. In the second case test arrival is made in free from traffic a safe place. The skilled mechanic-driver with the assistant make detailed verification of parametres of functioning of transmission with a card of switchings. During test work of units of transmission, the engine and systems of their management is checked. Normal work АТ in many respects depends on a condition and serviceability of functioning of the engine in this connection, to the power unit during test arrival it is given not less attention, than actually АТ.
Make sure of serviceability and absence of stress of switchings of transmission in all range of transfers (with 1 on 4) at movement in a normal city cycle at translated in position «D» the selector lever.
Check up serviceability of activation of a mode kickdown for each of transfers of a working range. Make sure of absence of stress of switching on a hill-climbing gear at squeezing against the stop gas pedals.
Estimate efficiency of braking by the engine at switchings «D» — «3» for the speed 50 ÷ 60 km/h, «3» — «2» for the speed 40 ÷ 50 km/h and «2» — «1» for the speed 20 ÷ 30 km/h.
On absence of sharp changes of turns of the engine at easy squeezing of a pedal of gas during movement on equal road make sure of serviceability of blocking of the hydrotransformer.
Stop the car on lifting with a bias of an order of 5 %, cock a lay brake and translate the selector lever in position «Р», - at serviceable functioning of the parking mechanism отпускание a lay brake should not lead откатыванию the car back.
Make sure of absence of extraneous noise and vibrations during movement and at a gear change.
For check of serviceability of functioning of the device supervising a steepness of a bias, make sure of non-failure operation of blocking of transmission on 3rd transfers to movement time uphill and at braking on descent.
Having finished trial runs, attentively examine картер transmissions on presence of traces of leaks ATF.
Stationary check («Stall-Test»)
One more simple method of check of condition АТ is Stall-Test. The test essence consists in definition of turns of the engine in positions «R» and «2» levers of the selector and at completely braked target shaft АТ (car wheels are blocked) and the pedal of gas squeezed out against the stop (throttle заслонка it is completely open). On size of these turns it is possible to judge serviceability of some elements of transmission.
Naturally, the data removed during stationary check, cannot be compared on completeness to the information received during test arrival. Nevertheless, it is necessary to remember that carrying out of trial runs far not in all cases is obviously possible, besides, in the competent image spent Stall-Test allows to estimate working capacity of transmission with the minimum risk of failure of its internal components.
The main risk interfaced to performance of stationary check, potential possibility of an overheat of transmission with what refusal of many manufacturers of the publication of standard cards of turns Stall-Test is connected is. Nevertheless, Stall-Test uses wide popularity among the experts who are engaged in regenerative repair of automatic transmissions for whom manufacturers АТ can let out the special bulletins made on the basis of carrying out of intrabranch research works. At once we will make a reservation that in order to avoid failure of internal components of transmission Stall-Test it should be carried out by the skilled mechanic.
The primary goals of check «Stall-Test» are check of serviceability of functioning of the converter of rotation (hydrotransformer) and an estimation of keeping ability муфт couplings / of braking АТ. Thus one of basic conditions of carrying out of check is serviceability of a condition and adequacy of adjustment of the engine. Check is made at the working engine and the transmission put on transfer, - do not forget to cock a lay brake and to prop up wheels противооткатными boots.
Before the check beginning estimate completeness of opening throttle заслонки and check up levels of impellent oil, ATF, a cooling liquid and differential oil, - in case of need make corresponding updatings.
Make sure. That the selector lever is in position «Р» or «N» and, having started the engine on single turns, in a current approximately a half an hour warm up transmission, having finished temperature ATF approximately to 50 ÷ 80 °С.
Having connected a tachometre, establish it so that indications highlighted on a board were easily read from a driver's place.
Check up reliability of fixing of the car противооткатными boots with which from both parties all wheels should be propped up.
Check up serviceability of functioning of a manual drive and translate the selector lever in position «2».
Firmly squeezing out a pedal of a foot brake, start to squeeze out slowly a pedal of gas before full opening throttle заслонки. As soon as engine turns are stabilised, quickly consider the indication of a tachometre and at once release a gas pedal.
Translate the selector lever in position «N» and allow to the engine to work on single turns (not above 1200 in a minute) within not less than 1 minute for the purpose of its cooling.
At the analysis of results of the made measurements adhere to following instructions:
a) Raised turns Stall-Test testify to proslipping of frictional elements of transmission (brake муфт or coupling disks). Also it is necessary to check up sufficiency of working pressure in a hydraulic path of transmission and to estimate condition ATF about its aeration;
b) excessively high, continuing to grow turns also specify in proslipping муфт couplings or pressure drop in an operating hydraulic path, however it is impossible to miss also probability of cutting шлицов a turbine drive on entrance to a transmission shaft, - repetition of the above described check in position «D» the selector lever can give more detailed information;
c) If turns Stall-Test approximately on 100 ё 200 units in a minute below norm, it can testify on decrease in efficiency of return of the engine; - check up a condition of components of system of ignition, try to replace candles and candle wires, spend measurement компрессионного pressure, or execute testing of cylinders of the engine for leaks;
d) Decrease in turns approximately on 1/3 below norm can speak about проворачивании the reactor of the converter of rotation. During performance of check the hydrotransformer should provide transfer of the maximum twisting moment that means full blocking of the reactor, refusal roller обгонной муфты can to hydrodynamic braking of a rotor (pump) and, as consequence, - to decrease in turns of the engine. Transfer of capacity developed by the engine thus essentially decreases that involves essential deterioration приемистости the car at трогании it from a place;
e) Turns Stall-Test correspond to standard requirements (Specifications see), - the given result confirms serviceability of a condition and correctness of options of the engine, and also normal functioning of internal components of transmission (including the hydrotransformer). Nevertheless, it is impossible to miss blocking possibility отпускания the reactor with refusal of transition of the hydrotransformer in a mode вязкостной муфты. If at full opening throttle заслонки speed of movement of the car considerably (approximately on 1/3) decreases, it can be considered as a sign of "freezing" of the reactor. Thus the acceleration on small speed will occur normally, movement in a cruiser mode becomes astable at the expense of refusal отпускания the reactor. Shovels of the "frozen" reactor partition off a stream of a hydraulic liquid, reducing efficiency of transfer by the twisting moment hydrotransformer. The similar situation is dangerous that through 25 ё 30 km of run in such mode occur to transmission functioning overheat ATF, the leader to proslippings and easing of keeping effort.
Translate the selector lever in position «R» and repeat check for the purpose of an estimation of serviceability of functioning of corresponding components of inclusion of transfer of a backing.
Check of time delays
On time of a delay of the push arising at switchings of the lever of the selector on single turns of the engine it is possible to estimate a condition муфты couplings of lowering transfers and backing transfer, обгонной муфты, and also brake assemblage lowering and back transfers.
Check should be made at heated-up to normal working temperature (60 ÷ 80 °С) трансмиссионной liquids. The pause between checks should make not less than one minute. For a guarantee of accuracy of results make three measurements and calculate average value.
Completely cock a lay brake and start the engine.
Make sure that air conditioner is switched off and check up idling turns.
Translate the lever of the selector from position «N» in position «D» and by means of a stop watch measure time of a delay of the moment of occurrence of a push. Excess by result of measurement of value 1.2 with can testify to insufficient pressure in a line, infringement of serviceability of functioning of coupling of lowering transfers, and also about malfunctions in work обгонной муфты.
Operating in a similar manner, measure size of a time delay at switching «N» — «R». Excess by result of measurement of value 1.5 with can testify to insufficient pressure in a line, infringement of serviceability of functioning of coupling of transfer of a backing, and also about refusal of brake assemblage lowering and back transfers.
Pressure check in a line
The general information
Check of hydraulic pressure in operating path АТ allows to confirm and specify the preliminary diagnosis which has been taken out at a stage of trial runs of a vehicle. If by results of test arrival the definitive conclusion becomes, necessity for carrying out of checks of hydraulic pressure disappears. The quantity of checked hydraulic contours depends on transmission model.
On considered in the present management АТ pressure check in a line should be made, in case of revealing of signs of proslipping муфт coupling or brake assemblages, and also in the presence of suspicions on infringement of correctness of the scheme of a gear change.
Infringement of absence of stress of raising switchings, and also overestimate of points of a gear change can result from excessive increase of pressure in an operating path of transmission. Excessive lowering of pressure can cause proslipping of brake assemblages and муфт couplings.
Check of pressure without loading
Поддомкратьте the car also establish it on props.
Make sure that the selector lever is in position «Р» or «N», start the engine and allow to it to work on the single
Turns of an order of 30 minutes for warming up ATF to temperature approximately 50°С.
Pressure check under loading
Cock a lay brake and prop up all wheels of the car противооткатными boots.
As well as at performance Stall-Test of measurement it is made on motionlessly established car in positions «2» and «R» АТ.
Duration of measurement should not exceed 5 seconds, in case of need repeated gauging it is necessary to allow to the engine to work on single turns, then not less than for 1 minute to muffle.
Temperature ATF during check should make an order 50°С.
Order of performance of check
Check of operating pressure distributing mufty / multidisk муфты LSD