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.
Slow shi n at wide
open rottle and
kickdown.
The disk is damaged. Replace the transmission assembly.
ft whe
th
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
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