Chery B11. Manual — part 229

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Startup disabled

Possible cause

Car startup is disabled when the gear lever is at
P or N position. The reason is possibly troubles
in engine, hydraulic torque converter or oil
pump.

Engine trouble
Hydraulic torque converter fault
Oil pump trouble

hecking Sequence 3

orward traveling disabled

Possible cause

C

F
When the engine is idly running, the car can’t
move forward even if the gear lever is shifted
from N to D, 3, 2, or L position. The reason is

ossibly abnormal pipeline pressure or troubles

the deceler ion clutch rear valve.

Abnormal pipeline pressure
Deceleration solenoid valve trouble
Valve body trouble

p
in

at

Checking Sequence 4

Check the engine assembly
Control system, ignition system,
fuel system and main machine
system

Check the hydraulic torque converter
Check if the installation is correct
(right or wrong insertion angle?) and if
the spline is damaged.

Replace the oil pump assembly (the oil
pump can’t be disassembled)

Repair if possible. Replace the
hydraulic torque converter
assembly if the spline is
damaged and can’t be repaired.

MUT-II Actuator test
● Serial No. 2 deceleration

solenoid valve

Normal: actuation noise can be
heard

Hydraulic test
● Measure the hydraulic

pressure of various
com

at L position

ponents

Check the deceleration clutch
● Dismantle the gearbox

assembly, valve body cover
and valve body

● When compressed air passes

through the oil vent of the
deceleration clutch in the
gearbox, the piston shall be
actuated and maintain its
pressure.

Replace the solenoid valve

Disassemble, clean and
reassemble the valve body
● Pay special attention to

loosened bolts, damaged O-
rings, valve and valve body

● Replace the valve assembly

in the case of damage that
can’t be repaired

Check the deceleration clutch
● Check if there are any

surface burns, damages of
piston seals and
interference by the jacket.

Normal

Normal

Abnormal

Abnormal

Abnormal

Normal

Norm l

Normal

Abnormal

Abnormal

Repair and replace

a

84

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Backup disabled

Possible cause

When the engine is idly running, the car can’t

o

.

ure of reverse clutch

verse-gear brake

lenoid valve

clutch

se brake

Valve body trouble

Abnormal press
Abnormal pressure of low/re

back even if the gear lever is shifted from N t
R position. The reason is possibly abnormal
pipeline pressure in the reverse clutch or
low/reverse brake, or troubles in the reverse
clutch or low/reverse-gear brake or valve body

Trouble in low/reverse-gear so
Trouble in reverse
Trouble in low/rever

hecking Sequence 5

MUT-II Actuator test。
● Serial No. 1 low/reverse-gear

solenoid valve
Normal: actuation noise can
be heard

Hydraulic test

● Measure the hydraulic

pressure of various
components at R position

C

Check the reverse clutch
assembly and low/reverse brake
assembly

Dismantle the gearbox

●

assembly, valve body
cover and valve body

● When compressed air

passes through the oil vents
of the reverse clutch and
low/reverse brake in the
gearbox, the piston shall be
actuated and maintain its
pressure.

Replace the low/reverse-gear solenoid valve

Disassemble, clean and

lve body

alve body

● Replace the valve assembl

reassemble the va

● Pay special attention to

damaged O-

loosened bolts,
rings, valve and v

y

in the case of damage that
can’t be repaired

Check the reverse clutch and
low/reverse brake

● Check if there are any

surface burns, damages of
piston seals and
interference by the jacket.

Abnormal

Normal

Normal

Hydraulic test

● Measure the low/reverse-

gear hydraulic pressure at
R position

Normal

Abnormal

Abnormal

Abnormal

Normal

85

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Traveling disabled (forward or backward)

Possible cause

When the engine is idly running, the car can
neither move forward nor back up regardless of

ine pressure

Transmission system trouble

Valve body trouble

Abnormal pipel

Oil pump trouble

the gear lever position. The reason is possibly
abnormal pipeline pressure or troubles in the
transmission system, oil valve or valve body.

Hydraulic test

● Measure the pressure of

various comp
the car is trave

onents while

ling forward

or back up.

Disassemble, clean and
reassemble the valve body

● Pay special attention to

loosened bolts, damaged O-

rings, valve and valve body

● Replace the valve assembly

in the case of damage that

can’t be repaired

Normal

Replace the oil pump (the oil
pump can not be
disassembled)

Abnormal

hecking Seq ence 6

ngine stops during gear shifting

Possible cause

C

u

E
When the engine is idly running, the engine

ops when the gear lever is shifted from N to

or R position. The reason is possibly trouble

engine, damp clutch control valve, valve

ody or hydraulic torque converter (damp

utch).

Engine trouble
Damp clutch control valve trouble
Valve body trouble
Hydraulic torque converter (damp clutch)
trouble

st
D
in
b
cl

★Refer to the Maintenance Manual of the Gearbox Workshop

Check the transmission system

● Disassemble the gearbox,

check the planetary gear

frame, output shaft and

differential, etc

Abnormal

Disassemble, clean and

reassemble the valve body

● Pay special attention to

loosened bolts, damaged

O-rings, valve and valve

body

● Replace the valve

assembly in the case of

damage that can’t be

repaired

Replace the hydraulic torque
converter

Abnormal

Check the engine assembly

● Control system, ignition

system, fuel system and

main machine system

Replace damp clutch control
solenoid valve

Abnormal

Repair, replace

Normal

86

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Impact and delayed response during
shifting from N to D position.

Possible cause

When the engine is idly running and the gear
lever is shifted from N to D position, there is
abnormal impact and delayed response for over
2 seconds. The reason is possibly abnormal
pressure of deceleration clutch or troubles in
deceleration clutch, body valve or idle speed
position switch.

Deceleration clutch abnormal pressure

Valve trouble

ch trouble

Deceleration solenoid valve trouble
Deceleration clutch trouble

Idle speed position swit

Checking Sequence 7

MUT-Ⅱ Actuator test
Serial No.2 deceleration solenoid valve
Normal: actuation noise can be heard

Replace deceleration solenoid valve

When does the impact occur?

During gear shifting

Hydraulic test (refer to Page 23-51)
Measure gearbox pressure during
shifting from N to D position

MUT-Ⅱ Data list
Serial No. 64 idle speed position
switch
Normal: when the accelerator
pedal is slightly stepped down,
the switch is turned off.

Check deceleration clutch system
Dismantle gearbox assembly, valve body
cover and valve body
When compressed air passes through the
oil vents in the gearbox, the piston shall
be actuated and maintain its pressure.

Check the idle speed position
Checking sequence 18 – check the
idle speed position switchgear
system (refer to Page 23-34)

Check the deceleration clutch
Check if there are any surface burns,
damages of piston seals and
interference by the jacket.

Disassemble, clean and reassemble
the valve body
Pay special attention to loosened
bolts, damaged O-rings, valve and
valve body
Replace the valve assembly in the
case of damage that can’t be
repaired

No Yes

Abnormal

Normal

Normal

Impact occurs sometimes

Abnorm

At startup

Abnorm

Normal

Abnormal

Normal

al

al

87