Service Infiniti QX4 since 1996 of release
1. Introduction
2. The maintenance instruction
3. Routine maintenance
4. The engine
5. Cooling and heating systems
6. Power supply systems and managements
7. Start and charge systems
8. A transmissionnaja line
8.1. 4-step automatic transmission
8.1.1. The general information
8.1.2. Problem diagnostics АТ - the general information
8.1.3. The Elektronno-hydraulic control system 4-step АТ
8.1.4. Removal and transmission installation
8.1.5. Replacement of an epiploon of lengthening of transmission
8.1.6. Removal and installation of cooler ATF
8.1.7. Removal and installation клапанной assemblages of a hydraulic contour of management АТ
8.1.8. Removal, check of a condition and installation приводного a cable of blocking of switchings
8.1.9. Adjustment of a drive of switching АТ
8.1.10. Adjustment of the gauge-switch of positions АТ / start permissions
8.1.11. Major repairs АТ
8.2. A distributing box
8.3. Differentials, power shafts / semiaxes
8.4. Kardannye shaft
9. Brake system
10. A suspension bracket and a steering
11. A body
12. An electric equipment
 












8-1-3-ehlektronno-gidravlicheskaya-sistema-upravleniya-4-stupenchatojj-at.html

8.1.3. The Elektronno-hydraulic control system 4-step АТ

The detailed information on the device and a principle of action of automatic transmissions is resulted in the Management on automatic transmissions of series АРУС № 179 (ISBN 5-89744-069-7).

The primary goal трансмиссионной lines is transfer of a twisting moment developed by the engine to car driving wheels. The organisation of correct transfer relations in редукторных knots АТ allows to minimise power expenses of the power unit for transfer of rotation at the expense of maintenance of optimum turns.

Management of transmission is carried out in the hydraulic way on commands of the electronic module of management (TCM), developed on the basis of the analysis of the data arriving from various information gauges. TCM carries out a choice of demanded transfer by activation of the electromagnetic operating valves providing giving of a hydraulic liquid a contour corresponding муфты of coupling. The precision control of operating pressure guarantees absence of stress of switchings and accuracy of definition of the moments of blocking of the hydrotransformer. The function chart of elektronno-hydraulic control system АТ — see an illustration the Function chart of elektronno-hydraulic control system АТ.

The placing scheme on the car of components of an electric part of control system АТ — see an illustration the placing Scheme the car of components of an electric part of control system АТ.

Principles of functioning of a hydraulic part of a control system — see illustrations Design features of elements of a hydraulic path of control system АТ and the Basic scheme of functioning of a hydraulic contour of management АТ. The basic under control parametres TCM are: the switching moment; the moment of blocking and the moment of braking by the engine.

Also as well as the control system of the engine a control system of transmission is included in a chain of onboard system of self-diagnostics OBD-II and in case of revealing of any sort of infringements the corresponding diagnostic code is brought in memory TCM. The order of reading of codes of malfunctions — see Problem diagnostics АТ - the general information. The list of the basic codes is resulted in Specifications (Transmissionnaja a line see).


Function chart of elektronno-hydraulic control system АТ

1 — — the Engine
2 — АТ
3 — the Gauge-switch of the closed position throttle заслонки
4 — the Gauge-switch of completely open position throttle заслонки
5 — TPS
6 — the Gauge-switch of the permission of start (PNP)
7 — Э/м the pressure valve in a line
8 — Э/м the valve blocking муфты the hydrotransformer
9 — Э/м the valve обгонной муфты couplings
10 — the Electromagnetic valve of switching And
11 — the Electromagnetic valve of switching In

12 — the Lowering resistor
13 — the Gauge of turns
14 — the Gauge of temperature ATF
15 — the Block of management ASCD
16 — the Switch of raising transfer
17 — engine Turns
18 — Opening throttle заслонки
19 — TCM
20 — the Control lamp of switching-off of raising transfer (OD)
21 — VSS
22 — ECM


The placing scheme on the car of components of an electric part of control system АТ


Design features of elements of a hydraulic path of control system АТ


The basic scheme of functioning of a hydraulic contour of management АТ

 


On page back
8.1.2. Problem diagnostics АТ - the general information
On the following page
8.1.4. Removal and transmission installation