Mitsubishi Montero Sport (2004+). Manual — part 618

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-37

FAIL-SAFE (IN CASE OF FAIL-SAFE VALVE A OPERATION)

1

2

3

4

5

6

6

6

6

7

8

9

10

11

12

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17

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19

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21

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23

24

25

26

27

28

29

30

31

R N

P

D
3
2
L

: LINE PRESSURE

: OIL PUMP SUCTION PRESSURE

: TORQUE CONVERTER CLUTCH
PRESSURE

: TORQUE CONVERTER AND LUBRICATION
PRESSURE

: TORQUE CONVERTER CLUTCH SOLENOID
VALVE PRESSURE

1. REVERSE

CLUTCH

2. LOW-REVERSE

BRAKE

3. SECOND

BRAKE

4. UNDERDRIVE

CLUTCH

5. OVERDRIVE

CLUTCH

6. ACCUMULATOR
7. CHECK

BALL

8. TORQUE

CONVERTER

CLUTCH

9. FAIL SAFE VALVE A
10. FAIL SAFE VALVE B
11. TORQUE CONVERTER CLUTCH CONTROL

VALVE

12.

SWITCH

VALVE

13. A/T FLUID COOLER
14.

LUBRICATION

15. LOW-REVERSE PRESSURE CONTROL VALVE
16. SECOND PRESSURE CONTROL VALVE

17. UNDERDRIVE PRESSURE CONTROL VALVE
18. OVERDRIVE PRESSURE CONTROL VALVE
19. TORQUE CONVERTER CLUTCH SOLENOID

VALVE

20. LOW-REVERSE SOLENOID VALVE
21.

SECOND

SOLENOID

VALVE

22. UNDERDRIVE SOLENOID VALVE
23. OVERDRIVE SOLENOID VALVE
24. TORQUE CONVERTER PRESSURE

CONTROL VALVE

25.

REGULATOR

VALVE

26.

MANUAL

VALVE

27.

OIL

FILTER

28.

OIL

PUMP

29.

OIL

STRAINER

30.

RELIEF

VALVE

31.

OIL

PAN

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-38

FAIL-SAFE (IN CASE OF FAIL-SAFE VALVE B OPERATION)

: LINE PRESSURE

: OIL PUMP SUCTION PRESSURE

: TORQUE CONVERTER CLUTCH
PRESSURE

: TORQUE CONVERTER AND LUBRICATION
PRESSURE

: TORQUE CONVERTER CLUTCH SOLENOID
VALVE PRESSURE

1

2

3

4

5

6

6

6

6

7

8

9

10

11

12

13

14

15

16

17

18

19

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22

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27

28

29

30

31

R N

P

D
3
2
L

1. REVERSE

CLUTCH

2. LOW-REVERSE

BRAKE

3. SECOND

BRAKE

4. UNDERDRIVE

CLUTCH

5. OVERDRIVE

CLUTCH

6. ACCUMULATOR
7. CHECK

BALL

8. TORQUE

CONVERTER

CLUTCH

9. FAIL SAFE VALVE A
10. FAIL SAFE VALVE B
11. TORQUE CONVERTER CLUTCH CONTROL

VALVE

12.

SWITCH

VALVE

13. A/T FLUID COOLER
14.

LUBRICATION

15. LOW-REVERSE PRESSURE CONTROL VALVE
16. SECOND PRESSURE CONTROL VALVE

17. UNDERDRIVE PRESSURE CONTROL VALVE
18. OVERDRIVE PRESSURE CONTROL VALVE
19. TORQUE CONVERTER CLUTCH SOLENOID

VALVE

20. LOW-REVERSE SOLENOID VALVE
21.

SECOND

SOLENOID

VALVE

22. UNDERDRIVE SOLENOID VALVE
23. OVERDRIVE SOLENOID VALVE
24. TORQUE CONVERTER PRESSURE

CONTROL VALVE

25.

REGULATOR

VALVE

26.

MANUAL

VALVE

27.

OIL

FILTER

28.

OIL

PUMP

29.

OIL

STRAINER

30.

RELIEF

VALVE

31.

OIL

PAN

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-39

LINE PRESSURE ADJUSTMENT

M1231108700110

1. Drain the transmission fluid.

NOTE: The hydraulic pressure test must be performed
before attempting any adjustments.

2. Remove the valve body cover.
3. Turn the adjusting screw shown in the illustration to adjust

the line pressure to the standard value. The pressure
increases when the screw is turned counterclockwise.
NOTE: Adjust to the middle of the standard range when the
transmission is at the 1st or 2nd gear.

Standard value: 0.98

− 1.05 MPa (142 − 152 psi)

NOTE: Each complete turn of the adjusting screw changes
pressure: 0.035 MPa (5.1 psi)

4. Install the valve body cover. Pour in one quart transmission

fluid.

5. Repeat the hydraulic pressure test. (Refer to

P.23A-26

.)

Readjust the line pressure if necessary.

DIAGNOSTIC TROUBLE CODE CHART

M1231101200136

AC100548

ADJUSTING
SCREW

AB

A/T
DIAGNOSTIC
TROUBLE
CODE

MFI
DIAGNOSTIC
TROUBLE
CODE

DIAGNOSIS ITEM

REFERENCE PAGE

11

−

TP sensor system

Short circuit

Group 13A,
Diagnostic
Trouble code
Procedures

P.13A-137

,

P.13A-148

,

P.13A-157

(P0121, P0122,
P0123

− Throttle

Position Sensor
Circuit)

12

−

Open circuit

14

−

Sensor out of adjustment

15

P0713

Transmission fluid temperature sensor
system

Open circuit

P.23A-42

16

P0712

Short circuit

P.23A-59

21

−

Crankshaft position sensor system

Open circuit

Group 13A,
Diagnostic
Trouble code
Procedures

P.13A-452

(P0335

−

Crankshaft
Position Sensor
Circuit)

22

P0715

Input shaft speed sensor system

Short circuit/open circuit

P.23A-69

23

P0720

Output shaft speed sensor system

Short circuit/open circuit

P.23A-91

26

−

Stoplight switch system

Short circuit

P.23A-113

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-40

NOTE: The MFI diagnostic trouble codes are the codes which are set when item "MFI" is selected on scan
tool MB991958 (MUT-III sub assembly). However, the codes above indicate failure in the automatic transmis-
sion.

27

P0705

Transmission range switch system

Open circuit

P.23A-123

28

Short circuit

P.23A-181

29

P0500

Vehicle speed sensor system

Short circuit/open circuit

P.23A-215

31

P0753

Low-reverse solenoid valve system

Short circuit/open circuit

P.23A-224

32

P0758

Underdrive solenoid valve system

Short circuit/open circuit

P.23A-240

33

P0763

Second solenoid valve system

Short circuit/open circuit

P.23A-254

34

P0768

Overdrive solenoid valve system

Short circuit/open circuit

P.23A-268

36

P0743

Torque converter clutch solenoid
system

Short circuit/open circuit

P.23A-282

41

P0731

1st gear incorrect ratio

P.23A-297

42

P0732

2nd gear incorrect ratio

P.23A-297

43

P0733

3rd gear incorrect ratio

P.23A-297

44

P0734

4th gear incorrect ratio

P.23A-297

46

P0736

Reverse gear incorrect ratio

P.23A-297

52

P0741

Torque converter clutch solenoid
system

Defective system

P.23A-310

53

P0742

Clutch stuck on

P.23A-315

54

P1751

A/T Control relay system

Short circuit to
ground/open circuit

P.23A-319

56

−

"N" range light system

Open circuit

P.23A-336

A/T
DIAGNOSTIC
TROUBLE
CODE

MFI
DIAGNOSTIC
TROUBLE
CODE

DIAGNOSIS ITEM

REFERENCE PAGE