Chery B11. Manual — part 225

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Part Four: Troubleshooting

1. The user’s pro

second and fourth gear but the noise disappears when

rbox is at the third gear. Please identify the possible causes:

Checking scheme

Case analysis:

blem is:

There is noise when the gearbox is at first,
the gea

Possible cause

Planetary gear set trouble

2. The automobile has not reverse gear. Please identify the possible causes:

Checking scheme

Possible cause

1. LR brake
(skidding, LR pressure control valve is
clogged, LR solenoid valve has short circuit)

. Reverse-gear clutch

If there is no engine braking when the vehicle
is traveling at D gear, LR brake may have
troubles.

2

3. It works properly at the first and second gear, but engine rotation speed suddenly increases
(racing) at the third gear. Please identify the possible causes:

Possible cause

Checking scheme

Mechanical problems with the overdrive clutch

-ring damage, OD pressure control valve)

solenoid valve for the following reason:

,

nly be kept at the second

ear; if there is open circuit, the gearbox will

(O
Note:
The trouble has nothing to do with OD

If there is short circuit in OD solenoid valve
the gearbox will o
g
only be kept at the third gear.

D position; howe

ravels for som

the vehicle encounters the same

when it is restarted. Please

hecking scheme

4. The vehical can get started at

ver, the engine rotation speed suddenly

e time. And

increases (racing) after the vehicle t
engine racing problem

identify the possible causes:

C

Possible cause

Unidirectional clutch damage
(In the case of the first gear at D position and a
traveling speed of over 10Km/h, LR brake is

etached. Therefore, the trouble will occur

en

ing occurs at L position.

sition and

unidirectional clutch damage does not generate

Unidirectional clutch may be damaged wh
no skidd
(because LR brake works at L po

d
when unidirectional clutch is damaged and it
will only happen to gearbox with a
unidirectional clutch

any influence)

68

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

5. Forward gear does not work. Please identif

Possible cause

y the possible causes:

Checking scheme

Mechanical problems with the underdrive
clutch
(O-ring damage, UD pressure control valve)
Note:
The trouble has nothing to do with UD
solenoid valve for the following reason:
If there is short circuit in UD solenoid valve,
the gearbox will only be kept at the four
if there is open circuit, the gearbox will only be
kept at the third gear.

th gear;

6. The vehicle is not sufficiently powered at startup and low-speed driving. N position light is

tify the possible causes:

Checking scheme

flashing once per second. Please iden

Possible cause

Failure mode (keep at the third gear)

Check if the gear has been shifted;
Check fault code with MUT-II

7. The vehicle is not sufficiently powered at startup and low-speed driving. N position light does
not flash. Please identify the possible causes:

Possible cause

Checking scheme

Unidirectional clutch damage (free) of the
torque converter

Stall test

8. N position light is flashing twice per second. Pl

Possible cause

Checking scheme

ease identify the possible causes:

A/T temperature sensor trouble

oo much or insufficient ATF oil

logged ATF cooler

AMP clutch does not work (DCC solenoid

alve, DCC control valve)

Use MUT-II to confirm if ATF temperature is
too high.
Confirm ATF quantity when its temperature
exceeds 80 ℃.
Confirm the returned oil quantity of ATF
cooler.
Confirm DA and DR pressure.

T
C
D
v

9
c

. There is clear impact when it is shifted from the second gear to the third gear, and it is not so

lear of the impact caused when it is shifted from the first gear to the second gear and from the

ird gear to the fourth gear. Please identify the possible causes:

Possible cause

Checking scheme

th

Second-gear brake skids.

ause: reverse-gear central gear rotates

ounterclockwise at the first gear;

everse-gear central gear is stuck at the second

ear;

everse-gear central gear rotates clockwise at

e third gear;

everse-gear central gear is stuck at the fourth

ear;

the second-

C
c
R
g
R
th
R
g
If

gear brake skids, the reverse-gear

69

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

central gear will be stuck for a longer period

hen it is shifted from the first to the second

nt impact will occur; the

verse-gear central gear will be released

ve

o

ar

r period when it is

hifted f om the third to the fourth gear and no

D clutch accumulator is in trouble
D clut

i proper

w
gear and no appare
re
earlier and rotate counterclockwise (constitute
a provisional first gear) when it is shifted from
the second to the third gear; when the overdri
clutch is engaged, the reverse-gear central gear
will change quickly from counterclockwise int
clockwise rotation and therefore create
apparent impact; the reverse-gear central ge
will be stuck for a longe
s

r

apparent impact will occur.
O
O

ch clearance is m

0. Im

1

pact is felt when the vehicle is traveling at around 30Km/h and there is no further shifting

hile N

fl hes; st p the v

icle, r

and there is gear shifting and N

is repeated after startup. Please identify the possible causes:

Checking scheme

w

position light as

o

eh

estart the engine

position light is off, but the problem

Possible cause

Input shaft speed sensor trouble
(damaged sensor, bad

n

c

Output shaft speed sensor trouble

data of input s
Use MUT-II to check the fault code and the

co tact of ircuit)

ontact of circuit)

Use MUT-II to check the fault code and the

haft speed sensor

data of output shaft speed sensor

(damaged sensor, bad c

70

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Troubleshooting

u

Code 11, 12, 14 throttle position sensor system

Possible ca se

If TPS output voltage is over 4.8V in the case
of engine idle speed, then the output will be
diagnosed to be excessive and the fault code 11

Throt
Connec
A/T-ECU

is output. Except for engine idle speed, it will
be diagnosed as bad adjustment of TPS and the

ult code 14 will be output if TPS output

oltage

tle pos

tor t

trouble

ition sensor trouble

rouble

fa
v

is below 0.2V.

Abnormal

Check of throttle position sensor

Normal

Abnormal

Check the following connectors: B
C-49

-07、C-29、

Normal

Abnormal

use

Normal

Abnormal

Code 15 Oil temperature sensor system

Possible ca

If the output voltage of oil temperature sensor
is still over 2.6V (temperature keeps stable)

Oil temperat
Connect

after more than ten minutes of traveling, this

ure sensor trouble

or trouble

A/T-ECU trouble

will be diagnosed as oil temperature sensor
open circuit and the fault code 15 will be
output

Check oil temperature

Abnormal

sensor

Normal

Check the following c

Abnormal

onnectors: B-07、C-29

Normal

Abnormal

Normal

ECU

Abnormal

Check electric wiring
Between throttle position sensor and A/T-

Check fault symptoms

Check electric wirin

etween oil temperature sensor and A/T-ECU

g

b

Check fault symptoms

Replace

Repair

Repair

Replace A/T-ECU

Repair

Repair

Replace A/T-ECU

Repair

71