Mitsubishi L200. Manual — part 300

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-107

Terminal
No.

Check item

Inspection condition

Standard value

1

Underdrive solenoid valve

• Engine: Idling

• Gear range: 1st gear

System voltage

• Engine: Idling

• Selector lever position: P

6

− 9 V

2

Solenoid valve power
supply

Ignition switch: LOCK (OFF)

1 V or less

Ignition switch: ON

System voltage

3

Solenoid valve power
supply

Ignition switch: LOCK (OFF)

1 V or less

Ignition switch: ON

System voltage

4

Shift indicator C <5A/T>

Refer to the notes in the margin.* −

5

Shift indicator A <5A/T>

Refer to the notes in the margin.* −

7

A/T fluid temperature
warning lamp

Ignition switch: ON

1 V or less to system voltage
(after several seconds have
elapsed)

9

4LLc switch

Ignition switch: ON
Transfer lever: 4L <Vehicles with
easy select 4WD> or 4LLc
<Vehicles with super select
4WD>

1 V or less

Ignition switch: ON
Transfer lever: Other than the
above

System voltage

11

Power supply voltage

Always

System voltage

12

Earth

Always

1 V or less

13

Earth

Always

1 V or less

14

Overdrive solenoid valve

• Engine: Idling

• Gear range: 3rd gear

System voltage

• Engine: Idling

• Selector lever position: P

6

− 9 V

15

Damper clutch control
solenoid valve

• Engine: Idling

• Selector lever position: P

System voltage

16

Second solenoid valve

• Engine: Idling

• Gear range: 2nd gear

System voltage

• Engine: Idling

• Selector lever position: P

6

− 9 V

17

Shift indicator B <5A/T>

Refer to the notes in the margin.* −

20

Ignition switch

Ignition switch: LOCK (OFF)

1 V or less

Ignition switch: LOCK (OFF) to
ON

System voltage to 1 V or less
(after several seconds have
elapsed)

24

Power supply

Always

System voltage

25

Earth

Always

1 V or less

26

Earth

Always

1 V or less

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-108

31

Input shaft speed sensor

• Measure between terminals 31

and 43 with an oscilloscope.

• Engine: 2,000 r/min

• Gear range: 3rd gear <4A/T>,

4th gear <5A/T>

Refer to

P.23A-110

, Inspection

Procedure Using an
Oscilloscope.

32

Output shaft speed sensor

• Measure between terminals 32

and 43 with an oscilloscope.

• Engine: 2,000 r/min

• Selector lever position: 3rd

gear <4A/T>, 4th gear <5A/T>

Refer to

P.23A-110

, Inspection

Procedure Using an
Oscilloscope.

38

Backup power supply

Always

System voltage

43

Sensor earth

Always

1 V or less

44

A/T fluid temperature
sensor

A/T fluid temperature: 20

°C

3.8

− 4.0 V

A/T fluid temperature: 40

°C

3.2

− 3.4 V

A/T fluid temperature: 80

°C

1.7

− 1.9 V

51

Reduction solenoid valve
<5A/T>

• Engine: Idling

• Gear range: 5th gear

System voltage

• Engine: Idling

• Selector lever position: P

6

− 9 V

55

Inhibitor switch: P

• Ignition switch: ON

• Selector lever position: P

System voltage

• Ignition switch: ON

• Selector lever position: Other

than above

1 V or less

56

Inhibitor switch: N

• Ignition switch: ON

• Selector lever position: N

System voltage

• Ignition switch: ON

• Selector lever position: Other

than above

1 V or less

57

Overdrive switch <4A/T>

• Ignition switch: ON

• Overdrive switch: OFF

1 V or less

• Ignition switch: ON

• Overdrive switch: ON

System voltage

Select switch <5A/T>

• Ignition switch: ON

• Selector lever position: Sport

mode

System voltage

• Ignition switch: ON

• Selector lever position: Other

than above

1 V or less

Terminal
No.

Check item

Inspection condition

Standard value

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-109

58

Inhibitor switch: L <4A/T>

• Ignition switch: ON

• Selector lever position: L

System voltage

• Ignition switch: ON

• Selector lever position: Other

than above

1 V or less

Shift switch (Down) <5A/
T>

• Ignition switch: ON

• Selector lever operation:

Downshift and hold the
selector lever

System voltage

• Ignition switch: ON

• Selector lever operation: Other

than above

1 V or less

62

Low-reverse solenoid
valve

• Engine: Idling

• Selector lever position: P

System voltage

• Engine: Idling

• Gear range: 2nd gear

6

− 9 V

66

Inhibitor switch: R

• Ignition switch: ON

• Selector lever position: R

System voltage

• Ignition switch: ON

• Selector lever position: Other

than above

1 V or less

67

Inhibitor switch: D

• Ignition switch: ON

• Selector lever position: D

System voltage

• Ignition switch: ON

• Selector lever position: Other

than above

1 V or less

68

Inhibitor switch: 2 <4A/T>

• Ignition switch: ON

• Selector lever position: 2

System voltage

• Ignition switch: ON

• Selector lever position: Other

than above

1 V or less

Shift switch (Up) <5A/T>

• Ignition switch: ON

• Selector lever operation:

Upshift and hold the selector
lever

System voltage

• Ignition switch: ON

• Selector lever operation: Other

than above

1 V or less

69

Vehicle speed sensor
<2WD>

• Measure between terminals 69

and body earth with an
oscilloscope.

• Engine: 2,000 r/min

• Gear range: 3rd gear

Refer to

P.23A-110

, Inspection

Procedure Using an
Oscilloscope.

Terminal
No.

Check item

Inspection condition

Standard value

TROUBLESHOOTING

AUTOMATIC TRANSMISSION

23A-110

NOTE: *: Using M.U.T.-III actuator function, check that the terminal voltage when the shift indicator is illumi-
nated is as follows.

Terminal No.

5

17

4

Check item

Shift indicator A

Shift indicator B

Shift indicator C

Shift
indicator

1

9 V

0 V

0 V

2

0 V

9 V

0 V

3

9 V

9 V

0 V

4

0 V

0 V

9 V

5

9 V

0 V

9 V

OSCILLOSCOPE CHECK PROCEDURE

M1231128500271

Terminal
No.

Check item

Inspection conditions

Normal condition
(Waveform sample)

31

Input shaft speed
sensor

Selector lever position:
D

Driving at constant
speed of 50 km/h in 3rd
<4A/T> or 4th <5A/T>
gear (1,400

− 1,700 r/

min)

Waveform A

32

Output shaft speed
sensor

69

Vehicle speed signal
<2WD>

62

Low-reverse solenoid
valve

• Ignition switch: ON

• Selector lever

position: P

• Engine: Stopped

• Throttle

(Accelerator)
opening voltage: 1
V or less

Force drive each
solenoid valve (Actuator
test)

Waveform B

1

Underdrive solenoid
valve

16

Second solenoid valve

14

Overdrive solenoid
valve

15

Damper clutch control
solenoid valve

51

Reduction solenoid
valve <5A/T>

71

A/T control relay

Ignition switch: OFF

1 V or less

Ignition switch: ON

System voltage to 1 V or less
(after several seconds have
elapsed)

72

Earth

Always

1 V or less

Terminal
No.

Check item

Inspection condition

Standard value