Chery B11. Manual — part 221

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Stall Test of Hydraulic Torque Converter

e automobile and measure and confirm that the gearbox oil temperature has

°C and the water temperature of engine has risen to 80°C—100°C.

d dow .

7. Start the engine.
8. Place the

ver at

or pedal and r d the maxium rotation

speed of the engine.
Note: do not

the thr

If it is necess

at the

n p ce the gear lever at N

and run the e

at a ro

AT before the second test is

carried out.
9. Shift the g

ver to

Standard val

First of all, start th

ed to

70—90

increas

Confirm ATF oil level.
1. Park the automobile on a flat and even floor.

2. Shift the gear successively to each position, inject ATF into the torque converter and oil circuit
and then place the gear lever on N.
3. Clean all filth around the dip stick and take it out to confirm the ATF oil level.
Note: if ATF smells burned and appears black, there must be something wrong with the gearbox,
in which case, the idle speed test shall not be carried out.
4. Check if ATF oil level is at the HOT mark. If the level is lower than the mark, please fill in
more ATF until the level reaches the HOT mark.
Stall test:
5. Place two wedges (left and right) under the two rear wheels.
6. Pull up th

ing brake ro

e park

d with the brake pedal fully steppe

n

gear le

D, fully step down the accelerat

ea

keep

ottle fully open for over 8 seconds.

ary th

idle speed test be done more than twice, the

cool down the

la

ngine

tation speed of 1,000rmp to

F

ear le

ue:

R and carry out the same test again.

Position D

Position R

Oriental Son

2,100 – 2,600rpm

2,100 – 2,600

(F4A42)

rpm

Judgement on the result of hydraulic torque converter idle speed test

Result Possible

cause

Low pipeline pressure

Excessive idle speed value in both D and R
positions

Low/reverse-gear brake skidding

Excessive idle speed value only in D position

Underdrive clutch skidding

Excessive idle speed value only in R position

Underdrive clutch skidding
Trouble in hydraulic torque converter

Low idle speed value in both D and R
positions

Insufficient motor output power

Oil pressure test
Note:
The wheels will turn during oil pressure test. Touch or collide with the turning wheels will result

the

re test will display many

gment if the troubles are caused by seal defects or damage, e.g. O-ring,

in unnecessary personal injury. Please watch out during test.
The oil pressure gauge is fixed onto various parts of the gearbox so that the pressure value of
hydraulic circuit at each gear position can be measured. The oil pressu
troubles. Make your jud
washer and seal ring

52

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

First of all, start the automobile and measure and confirm that the gearbox oil temperature has
increased to

70—90°C and the water temperature of engine has risen to 80°C—100°

1. Jack up the automobile with a jack so that its wheels may turn freel

C.

y.

then measure the oil pressure of low/reverse-gear brake

nd hydraulic torque converter at an engine rotation speed 2,500rpm.

ure the oil pressure of reverse clutch,

low/reverse-gear brake and hydraulic t

speed 2,500rpm.

Standa

ue o

s

Revers

a

rev

r b

0-17

3.5

/cm

Hydrau

ue converter

00kP

.7Kg

5. Place the gear lever at N position and then measure the oil pressure of low/reverse-gear brake
and hydraulic torque converter at an engine rotation speed 2,500rpm.
Standa

value o oil press

Low/re

rse-gea

an

aulic

rque conve

9

Pa (3.2-4.

)

6. In order to check first-gear oil pressure, please place the gear lever at L position (or driving
mode position), then measure the oil pressure of underdrive clutch, low/reverse-gear brake and
hydraulic torque converter at an engine rotation speed of 2.500rmp.
Standa

alue o

s

Underdrive clutch and low/reverse-gea

10 050kPa (1 3-10.7Kg

Hydraulic torque converter 500-700kPa (5.1-5.7Kg f/cm2)
7. In order to check second-gear oil pressure, pl
mode position 2 gear), then measure the oil pressure of underdrive clutch, second brake
hydraulic torque

rter

engin

n spe

of 2.500r

Standard oil pre
Underdrive clutch and second brake 10 0-1050kPa ( 0.3-10.7K

ydraulic torque converter 500-700kPa (5.1-5.7Kg f/cm2)

. In order to check third-gear oil pressure, please place the gear lever at 3 position (or driving

tch, overdrive clutch and

tandard oil pressure:

nderdrive clutch and overdrive clutch: 590-690kPa (6.0-7.0Kgf/cm2)
ydraulic torque converter 450-650kPa (4.6-6.6Kg f/cm2)

. In order to check fourth-gear oil pressure, please place the gear lever at D position (or driving

ode position 4 gear), then measure the oil pressure of overdrive clutch, second brake and

ydraulic torque converter at an engine rotation speed of 2.500rmp.

tandard oil pressure:

verdrive clutch and second brake: 590-690kPa (6.0-7.0Kgf/cm2)
ydraulic torque converter 450-650kPa (4.6-6.6Kg f/cm2)

2. Connect the tie-ins of MD998332 and MD998900 and the oil pressure gauge to the special port
for oil pressure measurement.

Mark

Speical tie-in for measurement

2ND

Second brake fluid pressure

UD

Underdrive clutch oi pressure

LR

Low/reverse-gear brake fluid pressure

DR

Hydraulic torque converter oil pressure

DA

Damp clutch oil pressure

V

Reverse-gear clutch oil pressure

OD

Overdrive clutch oil pressure

3. Place the gear lever at P position and
a
4. Place the gear lever at R position and then meas

orque converter at an engine rotation

rd val

e clutch

lic torq

f oil pres

nd low/

ure:

erse-gea

500-7

rake: 132

a (5.1-5

20kPa (1

f/cm2)

-17.5Kgf

2)

rd

f

ure:

ve

r brake

d hydr

to

rter: 300-3 0k

0Kgf/cm2

rd v

f oil pres ure:

r brake: 10

-1

0.

f/cm2)

ease place the gear lever at 2 position (or driving

and

conve

at an

e rotatio

ed

mp.

ssure:

1

1

gf/cm2)

H
8
mode position 3 gear), then measure the oil pressure of underdrive clu

ydraulic torque converter at an engine rotation speed of 2.500rmp.

h
S
U
H
9
m
h
S
O
H

53

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

10. If the measured result is not within the standard value, then identify the troubles with

ference to the following troubleshooting table:

ote:
o not unfix the pressure gauge then.

tandard table for oil pressure test – Oriental Son

Measurement conditions

Standard hydraulic pressure kPa (Kg/ cm

2

）

re
N
D

S

Gear
lever
position

Gear shift
position

Motor
rotation
speed
(rpm)

Underdrive
clutch oil
pressure
(UD)

Reverse
clutch oil
pressure
(RV)

Overdrive
clutch oil
pressure
(OD)

Low/revers
e-gear
brake oil
pressure
(LR)

Second
brake oil
pressure
(2

ND

)

Hydraulic
torque
converter
oil
pressure
(DR)

P

-

2500

- 310-390

- 310-390

(3.2-4.0)

- -

(3.2-4.0)

R Reverse

gear

2500 -

1320-1720
(13.5-17.5)

- 1320-1720

(13.5-17.5)

- 500-700

(5.1-7.1)

N

-

2500

- - - 310-390

-

(3.2-4.0)

310-390
(3.2-4.0)

First gear

2500

0-1050

- - 1010-1050

- 500-700

(5.1-7.1)

101
(10.3-10.7)

(10.3-10.7)

Second

2500

-

-

10.7)

500-700
(5.1-7.1)

gear

1010-1050

-

(10.3-10.7)

- 1010

1050
(10.3-

Third
gear

2500

590
(6.

450-650
(4.6-6.6)

590-690
(6.0-7.0)

-

-690

0-7.0)

- -

D

th

2500

590
(6.

450-650
(4.6-6.6)

Four
gear

-

-

-690

0-7.0)

- 590-690

(6.0-7.0)

Please refer to the attached Powe oint presentation of oil pipeline

rp

s.

54

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Part Three: Control system

he gearbox control device controls the work of transmission axle. It supervises and analyzes the

put signals of various sensors and then controls the relays, solenoid valves, the timing and

ffectiveness of gear shifting and the operation of damp clutch through the transmission axle.

eceive - signals from sensor

Determine – gearbox control
device

Execute - operation

T
in
e
R

Ignition switch

Gearbox control device (A/F-
ECU)

Automatic transmission
control relay

Input shaft rotation speed

ensor

Gear-shifting mode control

Damp clutch control solenoid
valve (DCC)

s
output shaft rotation speed

ensor

Gear-shifting hydraulic
control

Low/reverse-gear solenoid
valve

s
Crank angle sensor

Damp clutch control

Second-gear solenoid valve

Ignition coil (cementite)

N-position indicator light

Underdrive (UD) solenoid
valve

control

Throttle position sensor

Overdrive (OD) solenoid
valve

Temperature sensor of

utomatic transmission fluid

a
Inhibitor switch

Speed sensor

A/T oil temperature alarm
(“N” position indicator light
flashes)

Double pressure switch

Fail-safe operation (“N”
position indicator light
flashes)

Idle speed position switch

PI)

Troubleshooting code output
(“N” position indicator light
flashes)

(M

Accelerator pedal switch

ementite)

(c
Parking light switch (MPI)

Fixed-speed cruising control

evice

d
Gear-selecting switch (driving

mode)
Gear-shifting switch (driving

mode)

Engine ECU (MPI)

MUT-II

55