Great Wall Hover. Manual — part 19

Automatic transmission-7

Indicator lamp

Figure 2.2

control system

General

The transmission has two sets of control system, a electric control system and a hydraulic control system. The electric control
system monitors the vehicle parameter and adjusts the transmission performance; the hydraulic control system executes the

command of electric control system.

Electric control system

The electric control system consists of the sensor, TCU and 7 solenoid valves. TCU read in the data and make the output under the
control of software based on the value stored in Read Only Memory (ROM).
TCU controls the hydraulic control system and the control is realized through the valve and pump assembly. The system includes
7 solenoid valves, in which 6 valves are used to control the line pressure, operate the shift valve and hydraulic torque converter lock
clutch and switch on and off two regulating valves (Two regulating valves control the shift feel). The seventh solenoid valve is the
pressure regulating solenoid valve (VPS) which controls the shift feel with other three regulating valves. Figure 3.1 is the typical TCU
control system plan.

The figure includes all elements of electric control system involved in the section.

throttle position

open sensor

Engine speed

vehicle speed

Transmission

fluid temperature

mode selection

(instrument panel

/console )

Gear sensor

Forced step-

decreasing

K line

shifting
logic

shifting
sensing

line
pressure

hydraulic
control
system

Solenoid valve 1

Solenoid valve 2

Solenoid valve 3

Solenoid valve 4

Solenoid valve 5

Solenoid valve 6

Solenoid valve 7

pressure regulating

solenoid valve

Mode indicator lamp

Gear indicator lamp

set and other

necessary equipment

indication

Automatic transmission-8

Automatic transmission-9

Table 3.1 Feature parameter of temperature /resistance

-

20

13,638
5,177
2,278
177
75

17,287
6,616
2,723
196
85

Figure 3.2 Pin number of temperature /resistance

Pin No.

Wire color Connected solenoid valve

1

Red

solenoid valve 1

2

Blue

solenoid valve 2

3

yellow

solenoid valve 3

4

orange solenoid valve 4

5

green

solenoid valve 5

6

violet

solenoid valve 6

7

brown

solenoid valve 7

8

green

solenoid valve 5

9

white

temperature sensor

10

white

temperature sensor

ohm

Temperature Centigrade degree

Automatic transmission-10

Figure 3.3 Schematic diagram of temperature sensor position and solenoid valve wiring

2.Throttle position sensor

Figure 3.4 gear sensor

solenoid valve 4 (orange )

ground wire (2)

solenoid valve 7 power supply connector

olenoid valve 6 (violet )

ground wire

temperature sensor

solenoid valve (red )

ground wire

solenoid
valve (green )

solenoid valve (yellow )

solenoid valve (blue )

ground wire

ground wire

ground wire