Mitsubishi L200. Manual — part 279

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-23

8
<4A/T>

Selector lever
position: D
(Must be done
on a level and
straight road)

(1) Accelerate to

4th range at an
APS output of
1.5 V (opening
angle 20%).

(2) Slowly

decelerate and
stop.

(3) Accelerate to

4th range at an
APS output of
2.5 V (opening
angle 50%).

Data List No.35, 6
The shifting points
correspond with the
M.U.T.-III display and
the APS voltage
(opening angle) and
output shaft speed,
which are described
in the shift pattern.

Problem
during
shifting

−

Shocks, engine
racing

Incorrect
shift
points

−

All points

−

Some points

No
shifting

−

No diagnosis
codes

P1766

Input shaft
speed sensor
system

P1767

Output shaft
speed sensor
system

(1) Accelerate from

1st gear to 4th
gear.

(2) Downshift to 3rd

gear at speed of
50 km/h in 4th
gear.

(3) Downshift to

2nd gear at
speed of 30 km/h
in 3rd gear.

(4) Downshift to 1st

gear at speed of
20 km/h in 2nd
gear.

Data List No.11

(1) 1st

→ 2nd → 3rd

→ 4th

(2) 4th

→ 3rd

(3) 3rd

→ 2nd

(4) 2nd

→ 1st

No
shifting
from 1st
to 2nd, or
no shifting
from 2nd
to 1st

P1773

LR solenoid
valve system

P1775

2ND solenoid
valve system

P1779

1ST without
completion of
shifting

P1780

2ND without
completion of
shifting

No
shifting
from 2nd
to 3rd, or
no shifting
from 3rd
to 2nd

P1775

2ND solenoid
valve system

P1776

OD solenoid
valve system

P1780

2ND without
completion of
shifting

P1781

3RD without
completion of
shifting

No
shifting
from 3rd
to 4th, or
no shifting
from 4th
to 3rd

P1774

UD solenoid
valve system

P1775

2ND solenoid
valve system

P1781

3RD without
completion of
shifting

P1782

4TH without
completion of
shifting

Proced
ure

Pre-test/
operation
conditions

Test/operation

Judgment value

Check
item

Diagnosi
s code
No.

Inspection
procedure if
there is an
abnormality

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-24

8
<5A/T>

Suspends the
INVECS-II
function using
M.U.T.-III
Selector lever
position: D
(Must be done
on a level and
straight road)

(1) Accelerate to

5th range at an
APS output of
1.5 V (opening
angle 20%).

(2) Slowly

decelerate and
stop.

(3) Accelerate to

5th range at an
APS output of
2.5 V (opening
angle 50%).

Data List No.2, 6
The shifting points
correspond with the
M.U.T.-III display and
the APS voltage
(opening angle) and
output shaft speed,
which are described
in the shift pattern.

Problem
during
shifting

−

Shocks, engine
racing

Incorrect
shift
points

−

All points

−

Some points

No
shifting

−

No diagnosis
codes

P1766

Input shaft
speed sensor
system

P1767

Output shaft
speed sensor
system

Proced
ure

Pre-test/
operation
conditions

Test/operation

Judgment value

Check
item

Diagnosi
s code
No.

Inspection
procedure if
there is an
abnormality

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-25

8
<5A/T>

Suspends the
INVECS-II
function using
M.U.T.-III
Selector lever
position: D
(Must be done
on a level and
straight road)

(1) Accelerate from

1st gear to 5th
gear.

(2) Downshift to 4th

gear at speed of
60 km/h in 5th
gear.

(3) Downshift to 3rd

gear at speed of
50 km/h in 4th
gear.

(4) Downshift to

2nd gear at
speed of 30 km/h
in 3rd gear.

(5) Downshift to 1st

gear at speed of
20 km/h in 2nd
gear.

Data List No.11

(1) 1st

→ 2nd → 3rd

→ 4th → 5th

(2) 5th

→ 4th

(3) 4th

→ 3rd

(4) 3rd

→ 2nd

(5) 2nd

→ 1st

No
shifting
from 1st
to 2nd, or
no shifting
from 2nd
to 1st

P1773

LR solenoid
valve system

P1775

2ND solenoid
valve system

P1779

1ST without
completion of
shifting

P1780

2ND without
completion of
shifting

No
shifting
from 2nd
to 3rd, or
no shifting
from 3rd
to 2nd

P1775

2ND solenoid
valve system

P1776

OD solenoid
valve system

P1780

2ND without
completion of
shifting

P1781

3RD without
completion of
shifting

No
shifting
from 3rd
to 4th, or
no shifting
from 4th
to 3rd

P1773

LR solenoid
valve system

P1777

RED solenoid
valve system

P1781

3RD without
completion of
shifting

P1782

4TH without
completion of
shifting

No
shifting
from 4th
to 5th, or
no shifting
from 5th
to 4th

P1774

UD solenoid
valve system

P1775

2ND solenoid
valve system

P1782

4TH without
completion of
shifting

P1783

5TH without
completion of
shifting

Proced
ure

Pre-test/
operation
conditions

Test/operation

Judgment value

Check
item

Diagnosi
s code
No.

Inspection
procedure if
there is an
abnormality

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-26

SHIFT PATTERN

M1231126500714

UPSHIFT PATTERN <4A/T>

ACB01830

1

2

2

3

3

4

AB

0

50

100

150

200

Throttle
opening (%)

Vehicle speed (km/h)

Output shaft speed (r/min)

0

40

100

20

60

80

1,000

2,000

3,000

4,000

5,000

6,000

7,000

8,000

9

Selector lever
position: N
(Must be done
on a level and
straight road)

Selector lever
position and vehicle
speed

(1) Select R and

drive at 10 km/h

The ration of data list
No.5 and No.6
should be the same
as the transmission
ratio when reversing

No
shifting

P1766

Input shaft
speed sensor
system

P1767

Output shaft
speed sensor
system

P1784

Reverse
without
completion of
shifting

Proced
ure

Pre-test/
operation
conditions

Test/operation

Judgment value

Check
item

Diagnosi
s code
No.

Inspection
procedure if
there is an
abnormality