Toyota Land Cruiser, Amazon, LX470 Lexus
+ Identification numbers of the car
+ Governing bodies and receptions of safe operation of the car
+ Settings and routine maintenance of the car
+ Engine
+ Systems of cooling of the engine, salon and air conditioning heating
+ the Power supply system and production of the fulfilled gases
+ engine Electric equipment
+ Control systems of the engine and decrease in toxicity of the fulfilled gases
- Gear shifting box
- Automatic transmission (AT)
AT problem diagnostics - the general information
Adjustment of draft of gear shifting
Check, adjustment and replacement of the sensor switch of permission of start
Removal and installation of assembly of the lever of the AT selector
Removal and installation of automatic transmission
+ Transfer case
+ Transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
|
AT problem diagnostics – the general information
AT refusals occur on one of the following five reasons more often:
- Decrease in efficiency of return of the engine;
- Violation of adjustments;
- Malfunction of hydraulics;
- Mechanical damages;
- Failures of the onboard processor / its alarm chain.
Problem diagnostics always should begin with the simplest checks: estimate level and ATF condition (see. Head of Control and routine maintenance of the car), check adjustment of drives of gear shifting and a butterfly valve. Further, carry out trial runs of the car for the purpose of determination of efficiency of the brought corrections. If to eliminate a problem it was not possible, it is necessary to drive away the car on car repair shop for more detailed diagnostics with use of the special equipment. The description of violations of functioning of AT some of symptoms is provided in the Section devoted to problem diagnostics of knots and systems of the car at the beginning of the real Management.
Primary checks
|
|
1. During a short trip warm up transmission to normal working temperature.
2. Check ATF level (see. Head of Control and routine maintenance of the car):
a. If liquid has not enough, make the corresponding adjustment, having added necessary quantity of fresh ATF. Be convinced of correctness of the carried-out adjustment according to indications measuring щупа, then check transmission on existence of signs of external leaks (see below);
b. If level is excessively high, merge surplus of ATF, then check it on existence of traces of presence of the cooling liquid, testifying to violation of tightness of internal partitions of the radiator separating its heat exchanger from lateral tanks with ATF (see. Head of System of cooling of the engine, salon and air conditioning heating);
c. If ATF is made foam, empty transmission and fill it with fresh liquid, – merged ATF check on existence of traces of presence of cooling liquid.
3. Check installation of turns of idling of the engine (see. Head of Control and routine maintenance of the car). In case of need drive away the car on car repair shop for performance of the corresponding adjustments.
|
|
If the engine not as it should be, it is not necessary to start performance of primary checks of transmission until the corresponding corrections will be made. |
4. Make sure of correctness of adjustment and smoothness of a course of draft of a drive of gear shifting (see. Section Adjustment of draft of gear shifting). |
|
Diagnostics of leakages of ATF
General information
The majority of leaks easily come to light at visual check. Repair usually consists in replacement of the corresponding defective epiploon or laying. If to reveal a leak source during external survey it is not possible, act, as it is described below.
|
|
1. First of all it is necessary to exclude probability of a mistake in definition of the nature of leak. It is not necessary to confuse ATF to impellent oil or brake liquid (transmission liquid usually has dark red color).
2. For identification of a source of leak make short (some kilometers) a trip, then park the car over the outspread blank sheet of a cardboard. Later few minutes the source of leak can be revealed in the wake of liquid dripping on a cardboard.
3. Attentively examine a suspected site and a surface surrounding it, giving particular attention to joints of interfaced surfaces. For the purpose of expansion of a corner of the review use a pocket pocket mirror.
4. 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.
5. Make one more short trip, this time often changing speed of movement, then again examine the cleaned suspected site.
6. After identification 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 necessary recovery operations. Replacement of the damaged laying will not lead to desirable result if not to eliminate the defect of the interfaced surface which has led to an exit of a sealant out of operation. So, the deformed flange it is necessary отрихтовать. |
|
In below-mentioned subsections the most typical reasons of development of leakages of ATF and a condition which should be executed that there was no recurrence are listed.
|
|
Part from the listed requirements cannot be executed without use of the special equipment. In this case the car should be driven away on car repair shop. |
Leaks through prokladochny surfaces
Periodically examine the pallet of a case of transmission. Check existence on the places and reliability of a tightening of fixing bolts, watch, that on a cover there were no traces of mechanical damages (deformation of the pallet can lead to failure of the klapanny assembly located in transmission).
Excessively hard tightening of fixing bolts, violation of passableness of the ventilating line, mechanical damage of a sealing surface of a case of transmission, laying destruction, and also emergence of cracks belong to number of the possible reasons of development of leaks via the pallet or a poroznost of walls of a case. If laying of the pallet or a case of transmission is formed by a hermetic pillow, the probability of the wrong choice of type of the last is not excluded. To leaks through laying of the pallet can lead also case overflow by transmission liquid, or increase of pressure of ATF.
Leaks through epiploons and cuffs
Level/pressure of ATF, violation of passableness of a ventilating branch pipe, mechanical damage of walls of a landing nest, damage out of operation belong to number of the most typical reasons of an exit of epiploons of transmission excessively high actually an epiploon, or the 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 wear of bearings is not excluded also.
Check a condition and correctness of landing of a sealing cuff of a directing tube measuring щупа. Periodically examine on existence of signs of leaks a surface around an arrangement of a driving gear wheel of the speedometer/sensor of speed (VSS). In case of need make replacement of a sealing ring.
Leaks through defects in walls of a case of transmission
Formation of cracks or time in a body of a case of transmission can be the reason of development of leakages of ATF, consult at specialists of car-care center.
Check tightness of shtutserny knots of connection of hoses of a cooler of 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 of cooling liquid, passableness violation сапуна / a ventilating branch pipe or returnable drainage openings.
Diagnostics of other refusals of AT
Check of serviceability of functioning of electronic subsystems of AT
The structure of an electronic part of a control system of functioning of AT includes system of self-diagnostics which by means of a control lamp of shutdown of raising transfer (O/D OFF) warns the driver about malfunctions arising in transmission. It is possible to define a code by the same control lamp brought in memory of the device of malfunction.
|
|
The prevention and reading of codes of malfunctions become possible only at the included OD mode (the switch – in the situation ON), otherwise the control lamp will constantly burn in the regular mode. |
At emergence of malfunction of sensors of speed (VSS No. 1 or No. 2) or one of electromagnetic valves (No. No. 1, 2 or 4) a control lamp will start to blink, warning the driver about the arisen malfunction. In case of failure electromagnetic the valve No. 3 (the valve of management of the blocking coupling of the hydrotransformer) preventions of malfunction will not be.
|
|
It is possible to define a code of the malfunction which have arisen in transmission by the same control lamp: for this purpose it is necessary перемкнуть conclusions of "TE1" and «Е1» the diagnostic socket (address to an accompanying illustration). |
Check of serviceability of functioning of mechanical subsystems of AT
Check on completely braked car (stall test)
Operability of transmission and the engine is made by measurement of frequency of rotation of a cranked shaft in the provisions "R" and "D" AT at completely braked car.
|
|
ATF should be heated-up to normal working temperature (50-80 hail.). Duration of each check should not exceed 5 seconds. |
Check should be made strengths of two people: one should watch wheels of the car, the second makes necessary manipulations in car salon.
|
|
1. Brake lobbies and back wheels of the car.
2. Connect to the engine a tachometer.
3. Completely cock the parking brake.
4. Squeeze out against the stop a pedal of a foot brake.
5. Transfer a control lever a transfer case to the situation "N".
6. Start the engine. Transfer the AT selector lever to situation "D", squeeze out against the stop a pedal of gas and quickly consider tachometer indications.
|
|
If during check performance back wheels of the car start to rotate before frequency of rotation of the engine will reach demanded value, release a pedal of gas and stop check. |
7. Make similar check with transfer of transmission to the situation "R". |
|
If frequency of rotation of the engine in both cases appears identical and below demanded, therefore, the engine does not develop full capacity, or the coupling of a free wheeling of the AT hydrotransformer is faulty.
If frequency of rotation of the engine is higher than transmission demanded in situation of "D", it can testify to excessive pressure decrease in the main highway, pro-slipping in the coupling of a free wheeling No. 2, violation of serviceability of functioning of the coupling of a free wheeling of a raising planetary row, or pro-slipping in the coupling of direct transfer of a transfer case.
Excess of frequency of rotation of the engine in the provision "R" of transmission testifies to pressure drop in the main highway, pro-slipping in the coupling of direct transfer, pro-slipping in a brake of the first and back transfers, violation of serviceability of functioning of the coupling of a free wheeling of a raising planetary row, or pro-slipping in the coupling of direct transfer of a transfer case.
If turns of the engine are overestimated in both provisions of transmission, means, or pressure excessively fell in the main highway, or level of ATF does not correspond to demanded value, or serviceability of functioning of the coupling of a free wheeling of a raising planetary row is broken, or pro-slipping in the coupling of direct transfer of a transfer case takes place.
Check of time of delay of switching
If at the engine working at single turns to transfer the selector lever to one of advance ranges, till a start of motion should pass some time. On duration of this delay it is possible to judge serviceability of functioning of blocking couplings of a raising planetary row, a forward course, direct transfer and a brake of the first and back transfers.
|
|
Check should be made on the heated-up engine to normal working temperature. The end result should be received a method of averaging of results of three checks, between each of which should pass not less than one minute. It is provided detailed descriptions of a course of performance of this check below. |
|
|
1. Completely cock the parking brake. Transfer a control lever of a transfer case to the situation "N".
2. Start the engine and check turns of its idling (cm Head of Control and routine maintenance of the car), – in case of need make the corresponding adjustment.
3. Transfer the selector lever from the situation "N" to situation "D" and by means of a stop watch measure delay time, – average value of three consecutive measurements should not exceed 1.2 seconds.
4. Operating in a similar manner, define time of a delay of inclusion of a reverse gear which should not exceed 1.5 seconds. |
|
Too low pressure in the main highway, violation of serviceability of functioning of the coupling of a forward course, the coupling of a free wheeling of a raising number of planetary assembly, or a brake of the first and back transfers can be the reason of excessive size of a delay of inclusion.
Hydraulic test
|
|
Check is made by strengths of two people. |
Check is made at heated-up to normal working temperature (50-80 hail.) ATF.
|
|
1. Turn out a cap from a case of transmission and screw on its place a nozzle of a special manometer.
2. Cock the parking brake.
3. Start the engine and check correctness of installation of turns of idling (see. Head of Control and routine maintenance of the car), – in case of need make the corresponding adjustment.
4. Squeeze out a pedal of a foot brake and transfer the selector lever to situation "D".
5. Consider the manometer indication at single turns of the engine.
6. Squeeze out against the stop a pedal of gas and consider the new indication of a measuring instrument at the maximum turns of the engine.
|
|
If back wheels start to rotate before turns will reach the maximum value, immediately release gas and stop check. |
7. Operating in a similar manner make measurements in a backing mode.
8. Compare results of measurement to the card of pressure in the main highway (the card of pressure can be received at dealers of the Toyota company).
9. If pressure in both ranges is overestimated, it is necessary to make adjustment of a cable of an accelerator, to check a condition of a butterfly valve and/or a pressure regulator. |
|
The reasons of the underestimated results besides listed also violation of serviceability of functioning of the oil pump, and failure of the blocking coupling of a raising planetary row, the coupling of direct transfer of a planetary number of a transfer case (N), the coupling of a forward course of a transfer case (the N, L), or brakes of inclusion of lowering transfer of a transfer case (L) above can be.
If pressure is underestimated only in a mode "D", therefore there is a leakage of working liquid in a management contour in the corresponding range, or the coupling of a forward course is faulty.
In the mode "R" leakage of working liquid in the corresponding range, or violation of serviceability of functioning of a brake of the first and back transfers can be the reason of understating of pressure.
Trial runs
|
|
Tests should be made at heated-up to normal working temperature (50-80 °C) by ATF. |
Check in a range of "D" in normal and sports operating modes of AT
|
|
1. Transfer the AT selector lever to situation "D", squeeze out against the stop a pedal of gas and hold her in this situation. Check the moments of gear shifting 1-2, 2-3 and 3-4, – compare results of check to standard values.
2. Check is made for normal and sports modes of functioning of AT.
3. Absence of switching 1-2 testifies to an entrance out of operation the electromagnetic valve No. 2, or a valve 1-2 zalipaniye.
4. For absence of switching 2-3 the electromagnetic valve No. 1 answers, the probability of a zalipaniye of the valve of switching 2-3 is not excluded also.
5. In the absence of switching 3-4 check a valve 3-4 condition.
6. Violation of serviceability of functioning of a butterfly valve and valves of switching 1-2/2-3/3-4 can appear the reason of failure of the moments of gear shifting.
7. Absence of blocking of the hydrotransformer speaks failure of the electromagnetic valve No. 3, or a zalipaniye the valve of inclusion of blocking.
8. Estimate smoothness of gear shifting. By the reason of emergence of pushes violation of serviceability of functioning of the hydroaccumulator, or the control ball valve can be put excessively high pressure in the main highway.
9. Moving with the blocked hydrotransformer, or on the 4th transfer, estimate intensity of vibrations and a noise background.
|
|
Violation of balancing of driveshafts can be the reason of emergence of vibrations and noise also. |
10. Disperse the car before inclusion of the 4th transfer and, braking, define the moments of switching 4-3, 3-2 and 2-1. Compare results of check to standard values.
11. Estimate smoothness of switching.
12. Check quality of blocking of the hydrotransformer, at uniform movement on the 4th transfer blocking should occur for speed about 75 km/h. Slightly press a gas pedal, – turns of the engine should not change considerably, otherwise blocking of the hydrotransformer is broken. |
|
Check in a range «2»
|
|
1. Transfer the AT selector lever to situation "2", squeeze out against the stop a pedal of gas and hold her in this situation.
2. Define the moment of switching 1-2, compare result of check to standard requirements.
|
|
In this mode of switching 2-3, 3-4 and blocking of the hydrotransformer are forbidden; at movement with speed of 100 km/h and above braking by the engine is forbidden. |
3. Moving on the 2nd transfer, release a pedal of gas and estimate efficiency of braking of the car the engine. If braking is absent, therefore, the brake of providing this mode is faulty. |
|
Check in a range of "L"
At mode "L" inclusion any raising switchings are forbidden, – the car should move all the time on the first transfer.
|
|
1. Release a pedal of gas and estimate intensity of braking by the engine. If braking is absent, therefore, the brake of inclusion of the first and back transfers is faulty.
2. Estimate noise level and vibrations in the course of car braking by the engine. |
|
Check in «R» range
|
|
| Transfer the AT selector lever to the situation "R" and begin movement in squeezed out against the stop a gas pedal, pro-slipping of frictional elements of management should be absent. |
|
Check in a range of "R"
|
|
|
Park the car on a bias not less than 5 ° and transfer the selector lever to the situation "R", the parking brake do not cock, –
омобиль should remain motionless.
|
|
|
|