Chery B11. Manual — part 228
Chery·Maintenance Manual for Oriental Son
Automatic Transmission
the reverse gear
If the transmission ratio of the reverse gear
be
ird gear as a protection.
Input shaft speed sensor fault
d sensor fault
guard ring fault
ive gear or driven gear fault
Low/ reverse gear braking system fault
Reverse-gear clutch system fault
Noise interference
does not conform to the input of input shaft
speed sensor and the output of output shaft
speed sensor is increased, then Code 46 will
output. If Code 46 is output for 4 times
running, then the gearbox will be locked at the
Output shaft spee
Deceleration clutch
Transfer case dr
th
Code 51 Abnormal communications with
Possible cause
MUT-Ⅱ S-slfDiag code
Is Troubleshooting Code 22
output?
MUT-Ⅱ S-slfDiag code
Is Troubleshooting Code
23 output?
Measure the output wave form of input shaft
e
.
speed sensor with an oscilloscope
Connect with connector B-71 and measure th
voltage between A/T-ECU 31 and 43
Engine: 2,000rpm (about 50km/h)
Gearbox: third gear
Normal: e.g. one kind of wave form on Page
23-42 (using the checking sequence of the
oscilloscope) is output (fluctuate between 0 and
5V) a
wave
nd there is no noise interference for the
form.
Measure the output wave form of output shaft
speed sensor
ure th
Connect with connector B-68 and meas
voltage between A/T-ECU 32 and 43.
e
x: third gear
Gearbo
Normal: e.g. one kind of wave form on Page
23-42 (using the checking sequence of the
oscilloscope) is output (fluctuate between 0 and
5V) and there is no noise interference for the
wave form.
A/T overhaul
Check deceleration clutch system (Code 41 is
output or no troubleshooting code is output)
Check reverse-gear clutch system (No code is
output)
Check input shaft speed
sensor system (refer to
Yes
Page 23-14)
Check input shaft speed
sensor system (refer to
Page 23-15)
No
Replace input shaft speed sensor
Check fault sym toms
p
A/T overhaul: replace deceleration
clutch guard ring
Check fault sym toms
p
Eliminate noise interference
Replace
tp
ft speed
ou ut sha
sensor
Check fault symptoms
A/T overhaul: replace transfer
case drive gear and driven gear
Check fault sym toms
p
Eliminate noise interference
Yes
No
Abnormal
Normal
Abnormal
Normal
Abnormal
a
Abnormal
Abnormal
Abnorm l
80
Chery·Maintenance Manual for Oriental Son
Automatic Transmission
engine –ECU
When the ignition switch is turne
orage battery is over 10V and engine speed is
over 450rpm and there have been abnormal
r over 1 second running,
utput.
Engine-ECU fault
A/T-ECU fault
d on, the
Connector fault
st
communications fo
then Troubleshooting code 51 will be o
Check the following
Abnormal
Repair
Normal
Check the electric wi
Between engine-ECU
Repair
m
Normal
Replace engine-ECU
Normal
Check fault symptom
EC
Code 54 A/T control re
connectors: C-30, C-34, C-38
ring
and A/T-ECU
Abnormal
Normal
Check fault sympto s
s
Abnormal
Replace A/T-
lay system
Possible cause
U
When the ignition switch is turned on and the
ge is
ol relay will be diagnosed as
faults
ill be
x wi
third
tion.
A/T control relay
or fault
A/T-ECU fault
control relay volta
A/T contr
less than 7V, then the
Connect
suffering ground
output. The gearbo
and Code 54 w
ll be locked at the
gear as a protec
Check A/T control
Normal
re
3-49)
Abnorma
Replace
-41, C-4
Abnormal
Repair
unding
ttery
Abnorma
Repair
heck
fault
symptoms
Abnormal
Replace
A/T-ECU
lay (refer to Page 2
l
Check the following connectors: B-30, C-28, C-30, C
5
Normal
Check the electric wiring
gro
Between control relay and car body
elay and storage ba
Between control r
Between control relay and A/T-ECU
Normal
l
C
81
Chery·Maintenance Manual for Oriental Son
Automatic Transmission
Fault Symptoms Check List
Checking Sequence No.
Fault symptoms
No communications with MUT-II
1
Startup disabled
2
Forward traveling disab
3
led
Backup disabled
4
Driving disabled
Traveling disabled (travel forward or
back up)
5
Engine stops during gear shifting
6
Impact and delayed response during
shifting from N to D position.
7
Impact and delayed response during
shifting from N to R position.
8
Abnormal startup
Impact and delayed response during
shifting from N to R position or N to
D position.
9
Abnormal gear
ifting
Impact and high-speed running
10
sh
All positions
11
Displaced gear
ifting position
Some positions
12
sh
Gear shifting
isabled
No troubleshooting code
13
d
Poor acceleration
14
Abnormal driving
Vibration 15
Manual-gear-shifting-protective switchgear system
16
Mode control switchgear system
17
Idle speed position switchgear system
18
Double pressure switchgear system
19
Car speed sensor
20
Automatic constant-speed –ECU signal system
21
82
Chery·Maintenance Manual for Oriental Son
Automatic Transmission
Fault Symptoms Checking Sequence
Checking Sequence 1
No communications with MUT-VII disabled
Possible cause
The reason is possibly the faults in
troubleshooting circuit or A/T-ECU troubles
ircuit fault
A/T-ECU fault
Connector fault
Troubleshooting c
Checking Sequence 2
Is communication through
MUT-VII with other
systems enabled?
Check the troubleshooting
circuit relating to MUT-VII and
repair if necessary
Check the connection and
voltage of A/T-ECU
connectors.
De
measure the wiring side.
Voltage between Terminal
11, 24 and the ground
circuit
Check the following connectors:
C-28, C-30, C-45, C-56, C-83,
C-131, C-134
Check the electric wiring: connection
between the power source and A/T-
ECU
Connection between the ground
circuit and A/T-ECU
Check f
s
tach Connector C-28 and
Normal: storage battery
voltage
The connection between
C28 Terminal 12, 13, 125,
26, C30 Terminal 72 and
the ground circuit
Normal: connected
ault symptom
Replace A/T-ECU
Check the following
connectors: C-20, C-28,
C-30, C-49, C-66, C-83
Check the electric wiring
connection between
diagnose connector and A/T-
ECU
Check fault symptoms
Replace A/T-ECU
bnormal
A
Abnormal
Abnormal
Normal
Normal
normal
Ab
Normal
Normal
Abnormal
Normal
Abnormal
Abnormal
No
Yes
Repair
Repair
Repair
Repair
83
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