Mitsubishi 380. Manual — part 439

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-296

TRANSMISSION FLUID TEMPERATURE SENSOR
CHECK

M1231021800133

1. Remove the transmission fluid temperature sensor.
2. Measure the resistance between terminals 1 and 2 of the

transmission fluid temperature sensor connector.

Standard value:

3. If the transmission fluid temperature sensor resistance is

outside the specified range and the "N" range indicator light
is flashing, replace the transmission fluid temperature
sensor.

NOTE: The "N" range indicator light on the combination
meter flashes when the temperature reaches approximately
125

°C (257°F) or greater, and then stops flashing when the

temperature drops below approximately 115

°C (238°F).

TRANSMISSION INHIBITOR SWITCH CHECK

M1231021600117

Refer to

P.23A-294

.

STOPLIGHT SWITCH CHECK

M1231009100192

Refer to GROUP 35A, Brake Pedal

− Brake Pedal Inspection

P.35A-25

.

A/T CONTROL RELAY CHECK

M1231009300248

1. Remove the A/T control relay.

TRANSMISSION FLUID
TEMPERATURE

RESISTANCE

0

°C (32°F)

16.7

− 20.5 kΩ

20

°C (68°F)

7.3

− 8.9 kΩ

40

°C (104°F)

3.4

− 4.2 kΩ

60

°C (140°F)

1.9

− 2.2 kΩ

80

°C (176°F)

1.0

− 1.2 kΩ

100

°C (212°F)

0.57

− 0.69 kΩ

AC210186

2

7

1

8

3

9

4

6

10

5

TRANSMISSION FLUID

AC

AC306283

A/T
CONTROL
RELAY

RELAY BOX

AC

BATTERY

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-297

2. Use jumper wires to connect A/T control relay terminal 3 to

the negative battery terminal and terminal 2 to the positive
battery terminal.

3. Check for continuity between A/T control relay terminals 1

and 4 when the jumper wires are connected to and
disconnected from the battery.

4. If there is any problem with the A/T control relay, replace it.

JUMPER WIRE

CONTINUITY BETWEEN TERMINALS
NO.1 AND NO.4

Connected

Continuity

Disconnected

No continuity

AC100115

1 2
3 4

FRONT OF VEHICLE

AJ

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-298

SOLENOID VALVE CHECK

M1231009400267

1. Use diagnostic tool MB991958 (MUT-III sub assembly) to

measure the transmission fluid temperature. The desired
transmission fluid temperature setting for performing the
solenoid valve check is 20

°C (68°F).

2. Remove the A/T control solenoid valve assembly connector.

3. Measure the resistance between the solenoid valve

terminals.

4. The measured resistance of the solenoid valve when the

transmission fluid temperature is 20

°C (68°F) should match

the specified resistance on the chart below.

Specified resistance:

5. If the solenoid valve resistance is within the specified range,

check the power supply and the ground circuits.

6. If the solenoid valve resistance is not within the specified

range, drain the transmission fluid and remove the valve
body cover.

7. Disconnect the connector of any solenoid valves that are not

within the specified range.

TERMINAL
NO.

NAME

RESISTANCE

7 - 10

Damper control clutch
(DCC) solenoid valve

2.7

− 3.4 Ω [at

20

°C (68°F)]

6 - 10

Low-reverse solenoid
valve

8 - 10

Reduction (RED)
solenoid valve

4 - 9

Second solenoid valve

3 - 9

Underdrive solenoid
valve

5 - 9

Overdrive solenoid valve

AC306288AB

A/T CONTROL

SOLENOID VALVE

ASSEMBLY

2

7

1

8

3

9

4

6

10

5

10DB123A

Underdrive
solenoid
valve

Second
solenoid
valve

Damper
control clutch
solenoid
valve

Overdrive
solenoid
valve

Low-reverse
solenoid
valve

Reduction (RED)
solenoid
valve

ON-VEHICLE SERVICE

AUTOMATIC TRANSMISSION

23A-299

8. Measure the resistance between terminals 1 and 2 of any

solenoid valve that was not within the specified range.

Specified resistance: 2.7

− 3.4 Ω [at 20°C (68°F)]

9. If the resistance is not within the specified range, replace the

solenoid valve.

10.If the resistance is within the specified range, check the

wiring harness between the affected A/T control solenoid
valve assembly and the solenoid valve. If a problem is not
found in the above steps, check the solenoid valve O-rings
and replace them if necessary.

SELECTOR LEVER OPERATION CHECK

M1231001300426

1. Apply the parking brake, and check that the selector lever

moves smoothly and accurately to each position.

2. Check that the engine starts when the selector lever is at the

"N" or "P" position, and that it does not start when the
selector lever is in any other position.

3. Start the engine, release the parking brake, and check that

the vehicle moves forward when the selector lever is moved
from "N" position to "D" position or to 1st or 2nd gear in
Sports mode, and that the vehicle reverses when the
selector lever is moved to "R" position.

4. Stop the engine.

5. Turn the ignition switch to the "ON" position, and check that

the backup lamp illuminates when the selector lever is
shifted from "P" position to "R" position.

TRANSMISSION CONTROL CABLE
ADJUSTMENT

M1231028000064

1. Move the selector lever to the "N" position.
2. Loosen the upper control lever adjusting nut.

3. Gently push the transmission control cable in the direction of

the arrow, and then tighten the adjusting nut.

Tightening torque: 12

± 2 N⋅m (107 ± 17 in-lb)

4. Check that the transmission shifts to the correct range

corresponding to the position of the selector lever, and that it
functions correctly in that range.

AC100378

1
2

AB

10DB145A

THE SELECTOR LEVER MOVES WITHOUT

PUSHING THE BUTTON.

THE SELECTOR LEVER MOVES WHEN THE

BUTTON IS PUSHED.

10DB143A

12 ± 2 N·m
107 ± 17 in-lb

ADJUSTING NUT

MANUAL
CONTROL
LEVER