Mitsubishi Montero Sport (2004+). Manual - part 688

 

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Mitsubishi Montero Sport (2004+). Manual - part 688

 

 

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-317

Judgement Criteria

• Calculated slip (engine speed - input speed): 5 

r/min or less. (10 seconds)

• Calculated slip (engine speed - input speed): -5 

r/min or more. (10 seconds)

.

OBD-II DRIVE CYCLE PATTERN
Start the engine, and drive at 30 km/h (19 mph) for 
30 seconds. Then stop the vehicle, and turn OFF the 
ignition switch. After that, restart the engine, and 
drive again at 30 km/h (19 mph) for 30 seconds.

.

TROUBLESHOOTING HINTS (The most likely 
causes for this code to be set are:)

• Malfunction of the torque converter clutch sole-

noid valve

• Malfunction of the valve body

• Damaged harness, connector

• Malfunction of the PCM

DIAGNOSIS

Required Special Tool:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: MUT-III USB Cable

• MB991911: MUT-III Main Harness B

STEP 1. Using scan tool MB991958, read the A/T 
diagnostic trouble code.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check for A/T diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 36 set?

YES : Refer to 

P.23A-282

, DTC 36: Torque Converter 

Clutch Solenoid Valve System.

NO :  Go to Step 2.

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-318

STEP 2. Using scan tool MB991958, check data list item 52: 
Amount of Torque Converter Clutch Slippage.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine. (Warming up engine)
(3) Set scan tool MB991958 to the data reading mode.

• Item 52: Torque Converter Clutch Amount of Slippage.

• Driving at a constant speed of 60 km/h (37 mph), the 

display should be "

−10 to 10 r/min."

• If the accelerator pedal is released, the display on 

the scan tool changes (50 km/h (31 mph) and less).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the torque converter clutch slippage within the 

specified range?
YES : 
It can be assumed that this malfunction is intermittent. 

Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunction 

P.00-7

.

NO :  Go to Step 3.

STEP 3. Replace the PCM.
(1) Replace the PCM.
(2) Test drive the vehicle.
(3) Check for A/T diagnostic trouble code.
Q: Is DTC 53 set?

YES : Go to Step 4.
NO :  The procedure is complete.

STEP 4. Replace the valve body.

(1) Replace the valve body. Refer to GROUP 23B, 

Transmission 

P.23B-19

.

(2) Test drive the vehicle.
(3) Check for A/T diagnostic trouble code.
Q: Is DTC 53 set?

YES : Replace the Torque Converter. Refer to 

P.23A-453

Transmission and Transfer Assembly .

NO :  The procedure is complete.

AK303629AB

MB991911

MB991827

MB991824 

16-PIN

AC004272

VALVE BODY ASSEMBLY

AB

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-319

DTC 54 (P1751): A/T Control Relay System

A/T Control Relay System Circuit

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-320

.

CIRCUIT OPERATION

• A/T control relay (terminal 1) receives battery 

positive voltage through a junction block.

• The PCM (terminal 50) applies voltage to ener-

gize the A/T control relay (terminal 4). With the 
A/T control relay energized, system voltage is 
applied to the PCM (terminals 77 and 89).

.

DESCRIPTIONS OF MONITOR METHODS
If relay output voltage is below specified value, PCM 
judges that A/T control relay has a failure.

.

MONITOR EXECUTION
Continuous

.

AC202441

22

2021

10

9

8

1718

6 7

19

1415

4 5

1112

1 2 3

13

16

11

4

3

9

8

10

5 6

2

1

7

CONNECTORS: C-41, C-85

AB

C-41

C-41

C-85

C-85

PCM

60

46

66

57

45

44

64

55 56

65

62 63

52 53

5051

61

42

59

48

41
47
58

43
49

54

89
98

88
97

76 77

87

86

83
94

84
95

85

96

80
92

81
93

79

78
90 91

82

74

71 72 73

75

AC202311

CONNECTORS: C-90, C-91

AB

C-91 (GR) C-90 (GR)

C-91

C-90

AC202440

1
3 4

2

CONNECTOR: C-97

AB

C-97

AC202390

JUNCTION BLOCK (FRONT)

1

D-02 (GR)

AB

CONNECTOR: D-02

AC202391

JUNCTION BLOCK (REAR)

7 8

2

3

6

5

1

4

CONNECTOR: D-09

D-09

AB

 

 

 

 

 

 

 

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