Chery B11. Manual — part 226

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Code 21 Crank position sensor

Possible cause

If no output pulse from the cran
for over five seconds wh
speed of over 25km/h, then it w
angle sensor open circuit and f

k position sensor is

en the vehicle is traveling a

ill be diagnosed as crake

ault code 21 will be output.

sensor trouble

ector trouble

A/T-ECU trouble

detected

t a

Crank angle
Conn

Check the following connectors

Abnormal

: B-77、C-29

Chec

Normal

Abnormal

k elec

g

tric wirin

between crank position sensor and A/T-ECU

Normal

Abnormal

Normal

Abnormal

Code 22 Input shaft speed sensor system

Possible cause

If no output pulse from the input shaft speed sens
for over one second when the vehicle is traveling
the third or fourth gear, then it will be diagnosed
speed sensor open circuit or short circuit and f
be output. If the fault code 22 is output for 4 times running,
then the gearbox will be fixed at the third gear (D
be shifted to a lower gear at driving mode for pro

o

a

ault

position) or

tection.

r trouble

ard ring

uble

A/T-ECU trouble

r is detected

Input shaft speed senso

celeration clutch gu

at 30km/h at

De

s input shaft

code 22 will

tro
Connector trouble

Measure at C

eed senso

onnector B-71 of input shaft

r. Detach the connector and

easure the wiring.

oltage between 3 and the ground

gnition switch: on)

ormal: storage battery voltage
oltage between 2 and the ground

gnition switch: on)

ormal: about 5V

he connection between 1 and the

round

ormal: connected

sp
m
V
(i
N
V
(i
N
T
g
N

Normal

heck crank angle sensor system

C

C

heck fault symptoms

Abnormal

Abnormal

Check the following electric
wiring: between input shaft
speed sensor and ignition
switch; between input shaft
speed sensor and A/T-ECU

Repair

Check fault symptoms

Replace A/T-
ECU

Abnormal

Repair

Replace A/T-ECU

Repair

Repair

Check the following
connector: B-71, C-29

Repair

72

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Check the output wave form
of input shaft speed sensor.
(using oscilloscope).
Engine: 2,000r/min (about
50km/h), gearbox: third-
gear normal: ensure that the
wave form is as the figure
shows.

Normal

ode 23 Input shaft speed s

Possible cause

C

ensor system

If no output pulse from the output shaft speed

n the

urth

gear, then it will be diagnosed as output shaft
speed sensor open circuit or short circuit and

ult code 23 will be output. If the fault code 23

osition

Output shaft speed sensor trouble

tch guard ring trouble

sensor is detected for over one second whe
auto is traveling at 30km/h at the third or fo

fa
is output for 4 times running, then the gearbox

ed at the third gear (D p

) or be

will be fix
shifted to a lower gear at driving mode for

.

protection

Deceleration clu
Connector trouble
A/T-ECU trouble

Replace input shaft
speed sensor

Measure at Connector B-71 of Output
shaft speed sensor. Detach the

n switch: on)

connector and measure the wiring.
Voltage between 3 and the ground
(ignitio
Normal: storage battery voltage
Voltage between 2 and the ground
(ignition switch: on)
Normal: about 5V
The connection between 1 and the
ground
Normal: connected

Check the foll
connector: B-6

owing

8, C-29

Repair

Check the following electric

rin

switch; between output shaft
speed sensor and A/T-ECU

wi
speed sensor and ignition

g: between output shaft

Repair

Check fault symptoms

Replace A/T-
ECU

Abnormal

Abnormal

Normal

Normal

Check fault
symptoms

Abnormal

A/T overhaul,
replace
decelerating clutch
guard ring

Check fault
symptoms

Eliminate noise
interference

Abnormal

Check fault
symptoms

Abnormal

Replace A/T-
ECU

Abnormal

73

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Possible cause

Code 26 Parking lamp switchgear system
Parking lamp is on when the car is driving

Parking lamp switch fault
Connector fault
A/T-ECU fault

Check parking lamp switch.

Rep

Normal
Check the following connectors: C-02, C-30

lace

, C-65, C-47, C-83

Replace

ormal

U

eplace

o d valv

N
Check electric wiring: between parking lamp switch and A/T-EC

R

Normal
Check fault symptoms

Normal

Replace A/T-ECU

Code 31 Low and reverse-gear solen i

e

system
Code 32 Deceleration solenoid valve system
Code 33 Second-gear solenoid valve system
Code 34 Overdrive solenoid valve system

Possible cause

In the case of overresistance or underresistance

f solenoid valve, the solenoid valve will be
iagnosed as open circuit or short circuit and

orresponding troubleshooting code will be

utput; the gearbox will be locked at the third
ear as a protection.

Solenoid valve fault
Connector fault
A/T-ECU fault

o
d
c
o
g

R

t s

eplace outpu

haft

speed sensor

Check fault
symptoms

A/T overhaul,
replace transfer case
drive gear and
driven gear

Check fault
symptoms

Eliminate noise
interference

Check the output wave form

Abnorm

of out

Check fault
symptoms

Replace A/T-ECU

Abnormal

Normal

put shaft speed sensor

/min (about 50km/h)

rmal

al

(with an oscilloscope) engine:
2,000r
gearbox: third-gear normal:
ensure that the wave form is
as the figure shows.

Abno

Normal

74

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Check the solenoid valve. Refer to Page 23-
Normal

49

al

Replace

8,

Repair

A

ro

ormal

heck fault symptoms

Abnormal

Replace A/T-ECU

ode 36, 52 Damp clutch control solenoid

alve system

Possible cause

Abnorm

Check the following connectors: B-70, C-2
Normal
Check the following electric wiring
Between solenoid valve and A/T-ECU
Between solenoid valve and A/T-ECU cont
Normal

eplace solenoid valve

C-30, C-41

Abnormal

bnormal

Replace

l relay

R
N
C

C
v
In the case of

overresistance or

nderresistance of control solenoid valve of

e damp clutch, then the control solenoid

alve will be diagnosed as short circuit and

ode 36 will be output. If the load ratio of

amp clutch control solenoid valve is over
00% for over 4 seconds running, then the

ontrol solenoid valve will be diagnosed as

ort circuit and Code 52 will be output.

hen Code 36 is output, the gearbox will

e locked at the third gear as a protection.

Damp clutch control valve fault
Connector fault
A/T-ECU fault

u
th
v
C
d
1
c
sh
W
b

Check damp clutch control solenoid valve (refer to Page 23-49)

Replace

ormal

heck the following connectors: B-70, C-28, C-41

Repair

ormal

heck the following electric wiring

Replace

etween damp clutch solenoid valve and A/T-ECU
etween damp clutch solenoid valve and A/T-ECU

ormal

heck fault symptoms

Replace A/T-ECU

ode 41 Non-conformin

N
C
N
C
B
B
N
C

C

g transmission ratio of

Possible cause

75