Chery B11. Manual — part 230

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Impact and delayed response during

Possible cause

shifting from N to R position.

When the engine is idly running and the gear
lever is shifted from N to R position, there is
abnormal impact and delayed response for over
2 seconds. The reason is possibly abnormal
pressure of reverse clutch or underdrive bra
or troubles in reverse clutch, low/reverse brake,
body valve or idle spee

ke,

d position switch.

Reverse clutch abnormal pressure

ssure

oid valve trouble

le

ow/reverse brake trouble

Valve body trouble
Idle speed position switch trouble

Low/reverse brake abnormal pre
Low/reverse solen
Reverse clutch troub
L

Checking Sequence 8

hecking Sequence 9

MUT-Ⅱ Actuator test
Serial No.1 low/reverse solenoid
valve
Normal: actuation noise can be heard

When does the impact occur?

Impact occurs sometimes

Hydraulic test (refer to Page 23-51)
Measure reverse brake pressure at R
position

MUT-Ⅱ Data list
Serial No. 64 idle speed position
switch
Normal: when the accelerator

C

pedal is slightly stepped down,

f.

the switch is turned of

Check reverse clutch and low/reverse
brake assembly
Dismantle gearbox assembly, valve body
cover and valve body
When compressed air passes through the
oil vents of reverse clutch and
low/reverse brakes 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 underdrive clutch and reverse
brake
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

Abnormal

Normal

Normal

uring gear sh fting

Abnormal

At startup

Abn rm

Abnormal

No Yes

Replace underdrive solenoid
valve

D

i

Normal

al

o

88

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Impact and delayed response during

n.

Possible cause

shifting from N to D or N to R positio

When the engine is idly running and the gear

tion,

se

re of pipeline or troubles in oil

pump or valve body.

Abnormal pressure of pipeline
Oil pump trouble

lever is shifted from N to R or N to D posi
there is abnormal impact and delayed respon
for over 2 seconds. The reason is possibly
abnormal pressu

Valve body trouble

Checking Sequence 10
Impact and high-speed running

Possible cause

Oil pressure test
Check the hydraulic pressure of various
components at

and R positions

Impact occurs during gearing up or down and

e gearbox speed is higher than engine

tation speed. The reason is possibly abnormal

pipeline pressure or troubles in a certain
solenoid valve, oil pump, valve body, brake or
clutch.

Abnormal pipeline pressure
Trouble of each solenoid valve
Oil pump trouble
Valve body trouble
Trouble of each brake or clutch

th
ro

Checking Sequence 11

D

Adjust pipeline pressure

When does the impact occur?

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

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

During gear shifting

Abnormal

Abnormal

At startup

MUT-Ⅱ Actuator test
Serial No. 1 Low-speed/solenoid valve
Serial No. 2 Deceleration solenoid
valve
Serial No. 3 Second-gear solenoid
valve
Serial No. 4 Overdrive solenoid valve
Normal: noise can be heard

Replace the solenoid valve

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

Disassemble, clean and reassemb

valve body
Pay special attention to loosened bolts,
damaged O-rings, valve and valve
body
Replace the valve assembly in the case

Adjust pipeline pressure

of damage that can’t be repaired

Check the underdrive clutch and reverse
brake
Check if there are any surface burns,
damages of piston seals and interference
by the jacket

Abnormal

Abnormal

Normal

Normal

le the

89

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

All positions (displaced gear shifting
position)

Possible cause

Gear shifting position is displaced during
traveling. The reason is possibly trouble in
output shaft speed sensor, TPS or a certain
solenoid valve

Output shaft speed sensor trouble

ensor trouble

Troubles of various solenoid valves
Abnormal pipeline pressure
Valve body trouble
A/T-ECU trouble

Throttle position s

Serial

No. 31

Serial
No. 32

Serial
No. 33

Serial
No. 34

Travel at constant speed at the first gear

0%

0%

100%

100%

Travel at constant speed at the second gear

100%

0%

0%

100%

Travel at constant speed at the third gear

100%

0%

100%

0%

Travel at constant speed at the fourth gear

100%

100%

0%

0%

Checking Sequence 12

MUT-Ⅱ Data list
Serial No. 23 output shaft speed
sensor
Normal: increase in proportion to
car speed

Code 23 – output shaft speed
sensor system
Refer to Page 23-15

MUT-Ⅱ Data list
Serial No. 11 TPS
Normal: increase in direct
proportion to the throttle
opening

Check Code 11, 12, 14 TPS
system

Replace corresponding solenoid
valve

Serial No. 31 load percentage of
low/reverse solenoid valve
Serial No. 32 load percentage of

Serial No. 33 load percentage of second-
gear solenoid valve
Serial No. 34 load percentage of overdrive
solenoid valve

deceleration solenoid valve

Normal: refer to the table in Page 23-31

Abnormal

Normal

Normal

Adjust pipeline pressure

Replace A/T-ECU

Normal

Abnormal

Abnormal

Abnormal

Disassemble, clean and reassemble
the valve body
Pay special attention to loosened
bolts, damaged O-rings, valve and

Replace the valve assembly in the
case of damage that can’t be
repaired

valve body

90

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Some positions (displaced gear shifting
position)

Possible cause

Gear shifting position is displaced during

ut

Valve body fault

traveling. The reason is possibly trouble in
valve body or control-related phenomenon, b
not an abnormal case

Checking Sequence 13
No troubleshooting code gear shifting disabled)

Possible trouble

INVECS II Cancel command
Interrupt the INVECS-II function with
MUT-II

Does standard gear shifting
occur norma

?

Does it occur
only when the
automatic
gearbox oil
temperature is
lower than -29
°C or higher
than 125°C?

It is something
related to
control but not
an 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

lly

Yes

Yes

Yes

No

No gear shifting and no troubleshooting code output
occur during driving. The reason is possibly trouble
in manual-gear-shifting-protective switch or A/T-
ECU.

Manual-gear-shifting-protective switch
trouble
A/T-ECU trouble

Is the gear lever kept
at D position?

MUT-ⅡData
list
Serial No. 61

Manual-gear-
shifting-protective
switch
Normal: A/T-
ECU input signal
complies with the
gear lever

Does the backup power
source provide
electricity to A/T-ECU?

Does the power source
supply electricity to
A/T-ECU?

Check the power circuit
Pay special attention to the open circuit, bad contact of

In the case of broken fuse, identify the cause for short circuit
and then replace the fuse

Check the Manual-
gear-shifting-
protective switch
Checking Sequence
16 – check the
Manual-gear-
shifting-protective
switchgear system
(refer to Page 23-33)

No Abnormal

Yes

No

Yes

No

Yes

connectors and fuse open circuit

91