Mitsubishi 380. Manual - part 435

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-280

24

Transmission inhibitor 
switch: D

• Ignition switch: ON

• Transmission range: D

Battery positive voltage

• Ignition switch: ON

• Transmission range: Other than above

1 V or less

25

Transmission inhibitor 
switch: P

• Ignition switch: ON

• Transmission range: P

Battery positive voltage

• Ignition switch: ON

• Transmission range: Other than above

1 V or less

26

Transmission inhibitor 
switch: N

• Ignition switch: ON

• Transmission range: N

Battery positive voltage

• Ignition switch: ON

• Transmission range: Other than above

1 V or less

TERMINAL 
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-281

10DB125A

COVER

AIR

CLEANER

A/T

CONTROL

UNIT

CONNECTOR:  B-19

TERMINAL 
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION

          CONNECTOR
               (B-19)

1

Ground

Always

1 V or less

7

Power supply 
(Ignition)

Ignition switch: LOCK (OFF)

1 V or less

Ignition switch: ON

Battery positive voltage

8

Sports mode          
Shift switch (up)

• Ignition switch: ON

• Selector lever operation: Upshift and 

hold the selector lever

Battery positive voltage

• Ignition switch: ON

• Selector lever operation: Other than 

above

1 V or less

9

Sports mode          
Shift switch (down)

• Ignition switch: ON

• Selector lever operation: Downshift 

and hold the selector lever

Battery positive voltage

• Ignition switch: ON

• Selector lever operation: Other than 

above

1 V or less

10

Ground

Always

1 V or less

17

Sports select switch

• Ignition switch: ON

• Transmission range: Sport mode

Battery positive voltage

• Ignition switch: ON

• Transmission range: Other than above

1 V or less

18

Ground

Always

1 V or less

20

Flash EPROM   
battery

Data Link Connector

-

21

Battery Back-up

Always

Battery positive voltage

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-282

24

Vehicle speed signal

• Measure between connector (B-19) 

terminal 24 and 1 with an oscilloscope.

• Engine: 2,000 r/min

• Gear range: 3rd gear

Refer to 

P.23A-285

, 

Inspection Procedure 
Using an Oscilloscope.

27

Ground

Always

1 V or less

29

K-Line

Data Link Connector

-

30

P- Signal [vehicles 
with power memory 
seat- (driver side)]

-

-

31

N- Signal [vehicles 
with power memory 
seat- (driver side)]

-

-

TERMINAL 
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-283

10DB133A

COVER

ENGINE

CONTROL

UNIT

AIR

CLEANER

TERMINAL 
NO.

INSPECTION ITEM

INSPECTION REQUIREMENT

NORMAL CONDITION

       ENGINE-ECU                                   
CONNECTOR   (B-21)

18

Stoplight switch

• Ignition switch: ON

• Brake pedal: Depressed

Battery positive voltage

• Ignition switch: ON

• Brake pedal: Released

1 V or less