Mitsubishi 380. Manual — part 436

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-284

A/T-ECU TERMINAL RESISTANCE AND CONTINUITY INSPECTION CHART

M1231013400204

NOTE: The A/T-ECU connectors should be discon-
nected for this inspection.

10DB131A

SPECIAL TOOL A/T- ECU CHECK HARNESS (MB992045) CONNECTOR: COMPONENT SIDE

26-PIN
CONNECTOR
A/T-ECU CONNECTOR
(B-22)

34-PIN
CONNECTOR
A/T-ECU CONNECTOR
(B-19)

TERMINAL NO.

INSPECTION ITEM

NORMAL CONDITION (CHECK CONDITION)

(B-22) 12

− 6

Transmission fluid temperature
sensor

16.7

− 20.5 kΩ [at 0°C]

7.3

− 8.9 kΩ [at 20°C]

3.4

− 4.2 kΩ [at 40°C]

1.9

− 2.2 kΩ [at 60°C]

1.0

− 1.2 kΩ [at 80°C]

0.57

− 0.69 kΩ [at 100°C]

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-285

INSPECTION PROCEDURE USING AN OSCILLOSCOPE

M1231008500313

Waveform sample

(B-22)
TERMINAL
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL
CONDITION
(WAVEFORM
SAMPLE)

5 Input

shaft

speed

sensor

Gear range: 3rd gear

Driving at constant
speed of 50 km/h in 3rd
gear ( 1,900

− 2,100

r/min)

Waveform B

11

Output shaft speed
sensor

21

Low-reverse solenoid
valve

• Ignition switch: ON

• Transmission range: P

• Engine: Stopped

• Throttle (Accelerator)

opening voltage: 1 V or
less

Force drive each
solenoid valve (Actuator
test)

Waveform C

1

Underdrive solenoid
valve

14

Second solenoid valve

2

Overdrive solenoid
valve

15

Reduction (RED)
solenoid valve

8

Damper clutch control
(DCC) solenoid

AC001872AE

WAVEFORM A

(V)

0

5

(ms)

AC001873AD

WAVEFORM B

(V)

0

5

(ms)

AC001875AF

WAVEFORM C

(V)

0

20

(ms)

40

60

SPECIAL TOOLS

AUTOMATIC TRANSMISSION

23A-286

SPECIAL TOOLS

M1231000600413

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION APPLICATION

MD998330 (Includes
MD998331)
Oil pressure gauge (3.0
MPa, 427 psi)

MD998330-01

Measurement of hydraulic pressure

MD998332
Adapter

MD998332-01

Connection for oil pressure gauge

MB991958

A: MB991824
B: MB991827
C: MB991910
D: MB991911
E: MB991914
F: MB991825
G: MB991826

MUT-III sub assembly

A: Vehicle

communication
interface (V.C.I.)

B: MUT-III USB cable
C: MUT-III main harness

A (Vehicles with CAN
communication
system)

D: MUT-III main harness

B (Vehicles without
CAN communication
system)

E: MUT-III main harness

C (for Daimler
Chrysler models only)

F: MUT-III measurement

adapter

G: MUT-III trigger

harness

MB991824-KIT

NOTE: G:
MB991826
MUT-III trigger
harness is not
necessary when
pushing V.C.I.
ENTER key.

Checking diagnostic trouble codes

CAUTION

For vehicles with CAN
communication, use MUT-III main
harness A to send simulated
vehicle speed. If you connect
MUT-III main harness B instead,
the CAN communication does
not function correctly.

AC103525

MB991910

MB991826

MB991958

MB991911

MB991914

MB991824

MB991827

MB991825

DO NOT USE

A

B

C

D

E

F

G

DO NOT USE

SPECIAL TOOLS

AUTOMATIC TRANSMISSION

23A-287

MB992045
A/T-ECU Test Check
Harness

MD998478-01

Measurement of A/T-ECU terminal
voltage

MD998900
Adapter

MIT220433

Connection for oil pressure gauge

MB995062
Flushing tool

MLR-6906B or
Equivalent

Flushing cooler and tube

MB991454
Engine hanger balancer

MZ203827-01

When the engine hanger is used:
Supporting the engine assembly
during removal and installation of
the transmission assembly

NOTE: Special tool MB991454 is a
part of engine hanger attachment
set MB991453.

MB991527
Hanger

−

MB991895
Engine hanger

−

MB991928
Engine hanger

A: MB991929

Joint (50)

×2

B: MB991930

Joint (90)

×2

C: MB991931

Joint (140)

×2

D: MB991932

Foot (standard)

×4

E: MB991933

Foot (short)

×2

F: MB991934

Chain and hook
assembly

−

TOOL

TOOL NUMBER AND
NAME

SUPERSESSION APPLICATION

MB992045

B991454

B991527

MB991895

B991928

A

B

C

D

E

F

SLIDE BRACKET (HI)