Mitsubishi L200. Manual — part 277

AC103525

SPECIAL TOOLS

AUTOMATIC TRANSMISSION

23A-15

MD998330
(including
MD998331)

Oil pressure gauge (3.0
MPa)

Hydraulic pressure measurement

MD998332

Adapter

Oil pressure gauge connection

MD998900

Joint

Tool

Number

Name

Use

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-16

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1231104000153

Ask about trouble symptoms

Check the A/T fluid

Check the trouble symptoms

Replace the A/T fluid

To INSPECTION CHART FOR
TROUBLE SYMPTOMS

Reading of a diagnosis code

Erase of a diagnosis code

Check the trouble symptoms

Inhibitor switch, TPS check

Road test

Recheck diagnosis codes

To INSPECTION CHART FOR
DIAGNOSIS CODES

To INSPECTION CHART FOR
TROUBLE SYMPTOMS

Check for the cause

Repair

Confirmation test (road test)

INTERMITTENT MALFUNCTIONS
(Refer to GROUP 00 - Points to
Note for Intermittent Malfunction)

Completed

NG

OK

Communication with the
MUT-II not possible

Diagnosis code output
exists

No diagnosis code output

Abnormality exists (no diagnosis code output)

Abnormality exists
(diagnostic trouble
code output)

No abnormality

Found

Not found

OK

OK

NG

AC212495

NG

Diagnosis code output
exists

No diagnosis code output

Communication with the
M.U.T.-III not possible

AD

Perform the repair

DIAGNOSTIC FUNCTION

M1231103300151

SELECTOR LEVER POSITION INDICATOR
LAMP SYSTEM

AC504108AB

If there is a problem with any of the A/T system, the
selector lever position indicator lamp will flash at a
rate of approximately once per second.
If the selector lever position indicator lamp is flashing
at a rate of approximately once per second, check
the diagnosis output.

Selector lever position indicator lamp flashing

item

• Input shaft speed sensor system

• Output shaft speed sensor system

• Solenoid valves system

• Non-synchronization at various shift ranges

• A/T control relay system

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-17

NOTE: If the A/T fluid temperature warning lamp is
illuminating, the A/T fluid temperature is high. (It illu-
minates when the fluid is approximately 135

°

C or

more and goes off when the fluid is approximately
115

°

C or less.)

METHOD OF READING THE DIAGNOSIS
CODE

Use the M.U.T.-III to read the diagnosis code. (Refer
to GROUP 00

− How to Use Troubleshooting/Inspec-

tion Service Points .)

METHOD OF ERASING THE DIAGNOSIS
CODE

Use the M.U.T.-III to erase the diagnosis code.
(Refer to GROUP 00

− How to Use Troubleshooting/

Inspection Service Points .)

ROAD TEST

M1231100800500

Proced
ure

Pre-test/
operation
conditions

Test/operation

Judgment value

Check
item

Diagnosi
s code
No.

Inspection
procedure if
there is an
abnormality

1

Ignition switch:
LOCK (OFF)
position

Ignition switch
(1) ON

Data List No.8

(1) System voltage

[V]

A/T
control
relay

P1788

A/T control
relay system

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-18

2

Ignition switch:
ON
Engine:
Stopped
Selector lever
position: P

Selector lever
position <4A/T>

(1) P
(2) R
(3) N
(4) D
(5) 2
(6) L

Data List No.34

(1) P
(2) R
(3) N
(4) D
(5) 2
(6) L

Inhibitor
switch

P1770,
P1771

Inhibitor switch
system

Selector lever
position <5A/T>

(1) P
(2) R
(3) N
(4) D

Data List No.34

(1) P
(2) R
(3) N
(4) D

Selector lever
position <5A/T>

(1) D
(2) Select the sport

mode

(3) Upshift and hold

the selector lever
in that position
(2nd gear)

(4) Downshift and

hold the selector
lever in that
position (1st
gear)

Data List No.27

(1) OFF
(2) ON
(3) ON
(4) ON

Select
switch

−

Sport mode
switch system

Data List No.28

(1) OFF
(2) OFF
(3) ON
(4) OFF

Upshift
switch

Data List No.29

(1) OFF
(2) OFF
(3) OFF
(4) ON

Downshift
switch

Shift indicator lamp

(1) Only D

illuminates

(2) Only 1

illuminates

(3) Only 2

illuminates

(4) Only 1

illuminates

Shift
indicator
lamp

Overdrive switch
<4A/T>

(1) ON
(2) OFF

Data List No.26

(1) ON
(2) OFF

Overdrive
switch

−

Overdrive
switch system

Accelerator pedal

(1) Fully closed
(2) Depressed
(3) Fully opened

Data List No.35

(1) 0%
(2) Gradually

increases from (1)

(3) 100%

APS

−

Refer to
GROUP 13A

−

Troubleshootin
g.

Transfer shift lever
position

(1) Except for 4L

Data List No.31

(1) OFF
(2) ON

4LLc
switch

−

4LLc switch
system

Proced
ure

Pre-test/
operation
conditions

Test/operation

Judgment value

Check
item

Diagnosi
s code
No.

Inspection
procedure if
there is an
abnormality