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Chery B11. Manual - part 228

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

the reverse gear
If the transmission ratio of the reverse gear

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

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

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.

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)

Replace input shaft speed sensor

Check fault sym toms

A/T overhaul: replace deceleration
clutch guard ring

Check fault sym toms

Eliminate noise interference

Replace

ft speed

ou ut sha

sensor

Check fault symptoms

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

Check fault sym toms

Eliminate noise interference

Yes

Abnormal

Normal

Abnormal

Normal

Abnormal

Abnorm l

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

communications fo
then Troubleshooting code 51 will be o

Check the following

Abnormal

Repair

Normal
Check the electric wi
Between engine-ECU

Repair

Normal
Replace engine-ECU
Normal
Check fault symptom

Code 54 A/T control re

connectors: C-30, C-34, C-38

ring

and A/T-ECU

Abnormal

Normal
Check fault sympto s

Abnormal

Replace A/T-

lay system

Possible cause

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

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

Check the following connectors: B-30, C-28, C-30, C

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

Chery·Maintenance Manual for Oriental Son

Automatic Transmission

Fault Symptoms Check List

Checking Sequence No.

Fault symptoms
No communications with MUT-II

Startup disabled

Forward traveling disab

led

Backup disabled

Driving disabled

Traveling disabled (travel forward or
back up)

Engine stops during gear shifting

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

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

Abnormal startup

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

Abnormal gear

ifting

Impact and high-speed running

All positions

Displaced gear

ifting position

Some positions

sh
Gear shifting

isabled

No troubleshooting code

Poor acceleration

Abnormal driving

Vibration 15

Manual-gear-shifting-protective switchgear system

Mode control switchgear system

Idle speed position switchgear system

Double pressure switchgear system

Car speed sensor

Automatic constant-speed –ECU signal system

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

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

Abnormal

Normal

normal

Normal

Abnormal

Normal

Abnormal

Yes

Repair

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