Chery SQR 7160 sedan. Manual — part 81

CHERY AUTOMOBILE CO., LTD Automatic Transmission Fault Diagnosis Manual

4HP14 Automatic transm

diagnosis

Fault diagnosis

Auto

Fault description

Actions

ission fault

matic transmission initial inspection

Engine idle abnormal Z

Adjust the idle speed

The transmission
driving on bended road

has abnormal noise when Fill in transmission oil

The transmission does not rotate along with the Fill in tr
engine

ansmission oil

The transmission fluid has bubbles.

Replace part of the transmission fluid

The oil pan has a large amount of metal scraps

Replace transmission assembly

a

ion

Fault an

Fault analysis when the control handle is t Position P

Fault descript

alysis

Actions
Adjust the

t

mechanism

gear shifter cable or shif

The gear shifter cable or
shift mechanism is not
adjusted

gear shifter cable or shift

properly.

Replace the
mechanism

Adjust
cl

the parking gear to Adjust the parking gear to clear

ear

The parking system’s
ci

alled

incorrectly

Install the p

t

correctly

rcuit element is inst

arking system’s circuit elemen

Adjust the p

m

arking interlock syste

The parking interlock has

b

When nece

parking

interlock sys

a normal friction

ssary, replace the

tem

Adjust pawl spring

The parking gear

uld not engage or is

disengaged.

A

When neces

l spring

co

bnormal pawl spring gap

sary, replace the paw

S

h fault

Replace star

tart interlock switc

t interlock switch

Neutral start switch fault

Replace neutral start switch

The engine could not
be ignited

A

Adjust shift

bnormal shift shaft gap

shaft gap to normal

It is impossible to T
shift to back gear

el

lace

braking

ransmission braking

Rep

ectromagnetic valve fault

electromagn

transmission

etic valve

T
in
valve fault

Replace tra

tromagn

ransmission drive rod

terlock electromagnetic elec

nsmission drive rod interlock
etic valve

Shift gear without
stepping on the brake
pedal

Brake switch and brake
rod interlock
electromagnetic valve

Repair the brake switch and brake rod
interlock electromagnetic valve

Fault analysis when the control handle is at Position R

ault description

Fault diagnosis

Actions

F

Adjust the shift shifter cable

The shift shifter cable is not
adjusted correctly

When necessary, replace shift shifter cable

Transmission fluid feed filter
screen is obstructed

Replace oil feed filter screen

No back gear

Clutch B is damaged

Replace clutch B

34

CHERY AUTOMOBILE CO., LTD Automatic Transmission Fault Diagnosis Manual

necessary, replace the transmission

assembly

When

Replace brake D.

Brake D is damaged. No
braking on Position 1 and

ck gear

When necessary, replace the transmission
assembly.

ba
The governor is stuck.

Replace governor’s coupler
Replace the 1 gearshift valve inside the
bottom valve plate in the valve plate
assembly.

st

1 gearshift valve is locked
or the back gear is stuck.

When necessary, replace the transmission
assembly.

st

Skid or vibrate
wh n parking

Clutch B or D i

e

s damaged

Replace clutch B or D

When necessary, replace the transmission
assembly

Clutch B oil circuit leaks

Replace the square ring in the middle valve
plate

When necessary, replac

iddle valve

plate and oil pum

e the m

assembly.

p

Wh

nsmission

ass

en necessary, replace the tra

embly.

Shuttle valve D fault

Rep

the valve

pla

lace throttle restric or within

t

te oil circuit chamber

Vibrate after the
gear is engaged

When necessary, replace the control valve
plate assembly

Fuse fault

Replace the fuse

Circuit fault

Replace the wiring harness

The back light is
not on.

Neutral start switch fault

Replace the neutral start switch

trol handle is at Position N

osis

Actions

Fault analysis when the con

Fault description

Fault diagn

The engine could not be Starter interlock switch fault

Replace

starter

interlock

started

switch

The shift control mechanism
or shift cable between the

Adjust the
control h

control handle and the

shift between the

andle and the

transmission.

transmission

The
forw

When necessary, replace the
shift control mechanism or
shift cable

vehicle moves or creeps

ard

hen the control handle

D

ult description

Fault diagnosis

Actions

Fault analysis w

is at osition

P

Fa

Converter oil drain valve is always open

Replace the converter

Transmission oil feed filter screen is obstructed.

Replace transmission oil filter screen
Replace clutch A

Clutch A fault

When necessary, replace the transmission assembly.

Replace 1

st

gear one-way overrun clutch

1

st

gear one-way overrun clutch slips

When necessary, replace the transmission assembly.

Adjust the shift control mechanism or shift cable

Replace 3

rd

-4

th

shift slide valve spindle on the main valve plate

No power

Shift control mechanism or shift cable between
the control handle and the transmission

When necessary, replace the control valve plate assembly

35

CHERY AUTOMOBILE CO., LTD Automatic Transmission Fault Diagnosis Manual

Dirty governor

Clean governor valve coupler
Replace 1

st

-2

nd

gearshift valve on the control valve plate’s bottom valve

plate.

1

st

-2

nd

gearshift valve is stuck.

bly.

It is impossible to shift f
to 2

nd

gear and 2

nd

to 1

st

gear or

When necessary, replace the control valve plate assem
Replace brake C or C’

rom 1

st

1

st

to 2

nd

gear.

Brake C or C’ fault.

When necessary, replace the transmission assembly
Clean the governor

The governor is too dirty.

When necessary, replace t

he governor

Replace the 2 -3 shift valve spindle and spring

nd

rd

It is impossible to shift from 2

nd

to 3

rd

gear and 3

rd

to 2

nd

gear.

2

nd

-3

rd

gearshift valve is stuck.

When necessary, replace the valve plate assembly
Replace the clutch E

Clutch E is damaged.

When necessary, replace the transmission assembly
Replace the clutch E

Clutch E’s hydraulic fluid is leaking.

bly

It is impossible to shift from 2

nd

to 3

rd

gear.

When necessary, replace the transmission assem

Replace engine output shaft or worm shaft’s snap ring
Replace the oil pump mechanism for the whole middle seat

Engin
stuck.

e’s output shaft or worm shaft’s snap is

When necessary, replace the transmission assembly.

Middle seat’s hydraulic valve’s protection cap

Replace the whole middle seat and oil pump mechanism.

leaks.

Clean the governor

The governor is too dirty.

When necessary, replace the governor
Replac

It is

possible to shift from 3

rd

e 3

rd

-4

th

gearshift valve spindle and spring

im

th

When necessary, replace the valve plate assembly.

to 4 gear or 4

th

to 3

rd

gear.

3

rd

-4

th

gearshift valve is stuck.

Replace the brake C’

Brake C’ fault when 1

st

-2

nd

gearshift rod comes

When necessary, replace the transmission assembly

to its position.
The brake band does not have pretension.

It is

possible to shift from 3

rd

Adjust the brake band’s pretension.
Replace 2

nd

-3

rd

-4

th

gearshift valve spindle and spring within the gear valve

assembly’s bottom valve plate.

2

nd

-3

obstru

rd

-4

th

upshift valve does not have

ctions.

When necessary, replace the valve plate assembly.
Replace position 3 valve spindle and spring within the bottom valve plate
of the valve plate assembly.

im

th

Position 3 valve has obstructions

When necessary, replace the valve plate assembly.

to 4 gear.

Fault description

Fault diagnosis

Actions

Governor’s bushing is stuck.

Replace the governor’s connection mechanism.
Replace the 1
plate assembly

st

-2

nd

gearshift valve spindle and spring inside the valve

’s bottom valve plate.

1

st

to 2

nd

gearshift valve is obstructed.

Replace the valve plate assembly if necessary.

The brake band is too tense.

Adjust the brake band.

Parking at 2 gear

nd

The brake band could not be loosened.

Replace the brake band.

The middle snap ring at the governor’s flange is

Replace the middle snap ring on the gove

broken.

rnor’s flange.

The governor’s bushing is stuck.

Replace the governor’s connection mechanism.
Replace 1

st

-2

nd

gearshift valve inside the bottom valve plate and 2

nd

-3

rd

gearshift valve spindle and spring inside the main valve plate.

1

st

-2

nd

and 2

nd

-3

rd

gearshift valve is obstructed.

Replace the valve plate assembly if necessary.

Parking at 3

rd

gear

The valve cap at the middle flange when the clutch
B has oil feeds.

Replace the sealing of the valve cap at the middle flange.

Replace 2

nd

-3

rd

gearshift valve spindle and spring.

2

nd

–3

rd

gearshift valve is obstructed.

Replace the valve plate assembly if necessary.
Replace the 2

nd

-3

rd

-4

th

gearshift valve spindle and spring inside the

bottom valve plate.

2

nd

-3

rd

-4

th

gearshift valve is obstructed.

Replace the valve plate assembly if necessary.
Replace 1

st

-2

nd

-3

rd

gearshift valve spindle and spring.

The speed j mps directly from
1

st

to 3

rd

ge

1

st

-2

nd

-3

rd

gearshift valve is obstructed at the 1

st

–2

nd

part.

Replace the valve plate assembly if necessary.

u

ar

Jumps directly from 1

st

to 4

th

gear

The engine’s power is cut off.

Replace the valve plate assembly.

Clean the governor.

The governor is too dirty.

Replace the governor if necessary.

The governor’s main oil circuit leaks.

Replace the transmission assembly.

Shift qualit

s not good at idle

speed.

The gearshift valve does not work smoothly.

Replace the valve plate assembly.

y i

Poor shift point at wide open
throttle

The throttle cable is not adjusted correctly.

Adjust the throttle cable.

It is impo

ble to kickdown

from 2

nd

to 1 gear.

The throttle cable is not adjusted correctly.

Adjust the throttle cable.

ssi

st

It is impo

ble to kickdown

from 3

rd

to 2 gear.

The throttle cable is not adjusted correctly.

Adjust the throttle cable.

ssi

nd

The throttle cable is not adjusted correctly.

Adjust the throttle cable.

It is impo

ble to kickdown

from 4

th

to 3 gear.

The governor does not work steadily.

Replace the governor.

ssi

rd

The shuttle valve does not work normally.

Replace the valve plate assembly.

The main oil circuit’s oil pressure is too high.

Replace the valve plate assembly.

Too fast shif

The disk is damaged.

Replace the transmission assembly.

t when idle

The shuttle valve does not work normally.

Replace the valve plate assembly.

The main oil circuit’s oil pressure is too high.

Replace the valve plate assembly.

S l o w s h i

n a t w i d e

o p e n

r o t t l e a n d

k i c k d o w n .

The disk is damaged.

Replace the transmission assembly.

f t w h e

t h

The main oil circuit’s oil pressure is too high.

Replace the valve plate assembly.

The shuttle valve does not work normally.

Replace the valve plate assembly.

The throttle cable is not adjusted correctly.

Adjust the throttle cable.

Too fast shift wh at wide open throttle and
kickdown.

The overrun gear control valve is obstructed.

Replace the valve plate assembly.

en

Replace 3

rd

-4

th

valve spindle and spring.

The cable does not work smoothly at 3

rd

-4

th

gearshift valve.

Replace the valve plate assembly if necessary.

The engine has a too high RPM

hen upshift from 3

rd

to 4

th

gear

The brake band is not adjusted correctly.

Adjust the brake band.

w

36

CHERY AUTOMOBILE CO., LTD Automatic Transmission Fault Diagnosis Manual

The main oil circuit does not have normal oil
pressure.

Replace the valve plate assembly.

The tim

ownshift valve don’t

work no

Replace the val

.

e control valve and d

rmally.

ve plate assembly

Replace clutch A.

Clutch A is damaged.

Replace the transmission assembly if necessary.
Replace 4 -3 gearshift valve sp
spring.

th

rd

indle and

Clutch A and 4 -3 gearshift valve cable do
work normally.

th

rd

not

.

Replace the valve plate assembly if necessary

The en

when downshift

from 4

have normal cavity

pressure.

s.

gine has a too high RPM

th

to 3

rd

gear.

The worm wheel does not

Inspect and repair the ventilation pipe

Fault ana

Fault description

lysis when the control handle is a

Fault diagnosis

Actions.

t Position 2

2

nd

gear brake valve does not work normally.

bly.

Replace the valve plate assem

The forced braking does not have good effect
when downshift from 4

th

to 3

rd

gear. .

The governor does not work normally.

Replace the governor.
Replace the brake C’.

No engine braking.

The brake C’ is damaged.

Replace the transmission assembly if necessary.

Fault analysis when the control handle is at Position 1

Fault diagnosis

Actions.

Fault description

Replace 1

st

/back gear brake valve spindle and

spring.

1

st

gear/back gear brake valve does not work

normally.

Replace the transmission assembly if necessary.

The forced braking does not have goo
when kickdown from 2

nd

to 1

st

gear.

d

ally.

effect

The governor does not work norm

Replace the governor.
Replace the brake D.

No engine braking.

The brake D is damaged.

Replace the transmission assembly if necessary.

Other common fault analysis

Fault diagnosis

Actions.

Fault description

The positioning end of the throttle cable skids.

Install correctly the cable’s positioning end or replace
the cable.

The throttle cable’s bushing has too high friction.

Replace the throttle cable.

Throttle cable is difficult to operate.

The governor’s hydraulic valve is obstructed.

Replace the valve plate assembly.
Replace clutch A.

Clutch A is damaged.

Replace the transmission assembly if necessary.
Replace the snap ring or O ring on the worm.

The snap ring or O ring on clutch A’s worm is damaged.

Replace the transmission assembly, if necessary.
Replace the O-ring on piston A.
Replace piston A, if necessary.

Slide or shake when parking.

O ring on piston A is damaged.

Replace the transmission assembly, if necessary.

Shuttle valve A is damaged.

Replace the valve plate assembly.

Shuttle valve’s spring is damaged.

Replace the valve plate assembly.
Replace clutch A.

Clutch A is damaged.

Replace the transmission assembly, if necessary.

Shake when shifting from neutral to

rd

th

Replace the valve plate assembly

drive

3 -4 gear cable’s ball end is leaking.

Abnormal noise and slow engagement when the speed
is higher.

The oil pan’s oil feed filter screen is obstructed.

Replace oil feed filter screen.

Replace the targeted wheel.

The targeted wheel is damaged.

Replace the transmission assembly, if necessary.
Replace the oil pump.

No drive or back gear, loud noise.

The oil pump is damaged.

ission assembly, if necessary.

Replace the transm

The fluid level is too low.

Fill oil to the correct level.

Abnormal noises at all gear positions.

bly leaks.

Replace the control valve plate assem

The control valve plate assem

bly.

Abno mal noises when the oil pump
sucks the oil

The oil pan’s oil feed filter screen is obstructed.

r

Replace the oil feed filter screen.

The pretension on main back output gear’s bearing is not

Adjust the pretension on bearin
output gear.

adjusted correctly or has been changed.

g of the main back

Replace the transmission assembly, if necessary.
Adjust the pretension on the differential’s bearing.

Abnormal noises at shift.

The differential’s bearing pretension isn’t adjusted correctly or has been changed.

Replace the transmission assembly, if necessary.

37