Mitsubishi 380. Manual — part 433

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-272

L/R SOL
DUTY

12

Low-reverse
solenoid valve duty
%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 10 km/h (6.2
mph) in 1st gear

100%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 30 km/h (19
mph) in 2nd gear

100%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h (31
mph) in 3rd gear

100%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h (31
mph) in 4th gear

0%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h (31
mph) in 5th gear

0%

O/D SOL
DUTY

15

Overdrive solenoid
valve duty %

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 10 km/h (6.2
mph) in 1st gear

100%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 30 km/h (19
mph) in 2nd gear

100%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h (31
mph) in 3rd gear

0%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h (31
mph) in 4th gear

0%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h (31
mph) in 5th gear

0%

OSS
SENSOR

6

Output shaft speed
sensor (r/min)

Gear range: 3rd gear Driving at constant

speed of 50 km/h (31
mph)

1,100

− 1,400

r/min

MUT-III
DIAGNOSTI
C TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION
REQUIREMENT

NORMAL
CONDITION

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-273

SELECT SW

27

Select switch
<Vehicles with sport
mode>

Ignition switch: ON

Transmission range: D OFF

Selector lever
operation: Select sport
mode

ON

Selector lever
operation: Upshift and
hold the selector lever

ON

Selector lever
operation: Downshift
and hold the selector
lever

ON

SHIFT POS

11

Shift position

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 10 km/h in
1st gear

1st

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 30 km/h in
2nd gear

2nd

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h in
3rd gear

3rd

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 70 km/h in
4th gear

4th

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 70 km/h in
5th gear

5th

Transmission range:
R

Driving at constant
speed of 5 km/h in
reverse gear

REV

Transmission range: P, N

NP

MUT-III
DIAGNOSTI
C TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION
REQUIREMENT

NORMAL
CONDITION

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-274

SHIFT SW
DOWN

29

Shift switch (Down)
<Vehicles with sport
mode>

Ignition switch: ON

Transmission range: D OFF

Selector lever
operation: Select sport
mode

OFF

Selector lever
operation: Upshift and
hold the selector lever

OFF

Selector lever
operation: Downshift
and hold the selector
lever

ON

SHIFT SW
UP

28

Shift switch (Up)
<Vehicles with sport
mode>

Ignition switch: ON

Transmission range: D OFF

Selector lever
operation: Select sport
mode

OFF

Selector lever
operation: Upshift and
hold the selector lever

ON

Selector lever
operation: Downshift
and hold the selector
lever

OFF

STOPLIGHT
SW

19

Stoplight switch

Ignition switch: ON
Engine: stopped

Brake pedal:
Depressed

ON

Brake pedal: Released OFF

DCC
SLIPPAGE

10

Damper clutch
amount of slippage

• Warmed up

• Transmission

range: Sport
mode <Vehicles
with sport mode>

Driving at constant
speed of 50 km/h in
3rd gear

Approx. 100 to
300 r/min

Driving at constant
speed of 70 km/h in
4th gear

Approx. 0 to
10 r/min

Release accelerator
pedal (at less than 50
km/h)

The value
should
fluctuate when
the accelerator
is released.

DCC SOL
DUTY

17

Damper control
clutch solenoid valve
duty %

• Warmed up

• Transmission

range:
Sport mode
<Vehicles with
sport mode>

Driving at constant
speed of 50 km/h in
3rd gear

Approx. 70

−

90%

Accelerate to 50 km/h
in 3 position, then
release accelerator
pedal

70

− 90% →

0% Decreases
gradually as
the vehicle
speed
decreases

MUT-III
DIAGNOSTI
C TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION
REQUIREMENT

NORMAL
CONDITION

AUTOMATIC TRANSMISSION DIAGNOSIS

AUTOMATIC TRANSMISSION

23A-275

TFT
SENSOR

7

Transmission fluid
temperature sensor

Warmed up

Drive for 15 minutes or
more so that the
transmission fluid
temperature becomes
70

− 90°C

Gradually rises
to 70

− 90°C

AP SENSOR

2

AP sensor (mV)

• Ignition switch:

ON

• Engine: Stopped

• Transmission

range: P

Accelerator pedal:
Release

900

− 1100 mV

Accelerator pedal:
Depressed

Gradually rises
from the above
value

Accelerator pedal:
Fully depressed

4,000 mV or
more

INHIBITOR
SWITCH

34

Transmission
inhibitor switch

Ignition switch: ON

Transmission range: P P

Transmission range: R R

Transmission range: N N

Transmission range: D D

U/D SOL
DUTY

13

Underdrive solenoid
valve duty %

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 10 km/h (6.2
mph) in 1st gear

0%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 30 km/h (19
mph) in 2nd gear

0%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h (31
mph) in 3rd gear

0%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h (31
mph) in 4th gear

0%

Transmission range:
Sport mode
<Vehicles with sport
mode>

Driving at constant
speed of 50 km/h (31
mph) in 5th gear

100%

MUT-III
DIAGNOSTI
C TOOL
DISPLAY

ITEM
NO.

INSPECTION ITEM

INSPECTION
REQUIREMENT

NORMAL
CONDITION