Mitsubishi Montero (2002-2004). Manual - part 985

SYMPTOM PROCEDURES <AUTOMATIC TRANSMISSION>

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SYMPTOM PROCEDURES

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DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check data list item 67: 
Select Switch, item 68: Shift Switch (Up), item 69: Shift 
Switch (Down).

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502. 
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to data reading mode for following 

items.

a. item 67: Select Switch
b. item 68: Shift Switch (Up)

c. item 69: Shift Switch (Down)

• The switches above are displayed, depending on the 

selector lever condition as shown in the table.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?

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.00-6

.

NO :  If item 68 and item 69 both are NG: Go to Step 2. If 

only item 67 is NG: Go to Step 5. If only item 68 is 
NG: Go to Step 15. If only item 69 is NG: Go to Step 
20.

STEP 2. Check the shift switch assembly.
Refer to 

P.23Aa-32

, Transmission Control.

Q: Is the switch operating properly?

YES : Go to Step 3.
NO :  Replace the shift switch assembly. Refer to 

P.23Aa-

33

, Transmission Control.

SELECTOR 
LEVER 
OPERATION

DATA LIST ITEM

67

68

69

D range

OFF

OFF

OFF

Sport mode

ON

OFF

OFF

Upshift and hold 
the selector lever

ON

ON

OFF

Downshift and 
hold the selector 
lever

ON

OFF

ON

ACX01539AD

MB991502

16-PIN

SYMPTOM PROCEDURES <AUTOMATIC TRANSMISSION>

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SYMPTOM PROCEDURES

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STEP 3. Check shift switch assembly connector E-115 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are the connector and terminals in good condition?

YES : Go to Step 4.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

.

STEP 4. Check harness for open circuit between 
intermediate connector E-11 terminal 14 and shift switch 
assembly connector E-115 terminal 3.
Q: Is the harness wire in good condition?

YES : Go to Step 25.
NO :  Repair or replace the harness wire.

AC204176

CONNECTOR : E-115

BE

8

3

4 5

1

2

6 7

AC204194

CONNECTORS : E-11, E-115

E-11

E-11

BJ

E-115

E-115

3

10

16

9

7 8

6

1

4

2

5

11

14

1213

15

8

3

4 5

1

2

6 7

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SYMPTOM PROCEDURES

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STEP 5. Using scan tool MB991502, check data list item 61: 
Transmission Range Switch.

CAUTION

To prevent damage to scan tool MB991502, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991502. 
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to data reading mode for item 61, 

Transmission Range Switch.

• Scan tool MB991502 should display "D" when the trans-

mission range is "D" range.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?

YES : Go to Step 6.
NO :  Refer to 

P.23Ac-93

, 

P.23Ac-123

, DTCs 27, 28: 

Transmission range switch system.

STEP 6. Check the shift switch assembly.
Refer to 

P.23Aa-32

, Transmission Control.

Q: Is the switch operating properly?

YES : Go to Step 7.
NO :  Replace the shift switch assembly. Refer to 

P.23Aa-

33

, Transmission Control.

STEP 7. Check shift switch assembly connector E-115 for 
loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 8.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

.

ACX01539AD

MB991502

16-PIN

AC204176

CONNECTOR : E-115

BE

8

3

4 5

1

2

6 7

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SYMPTOM PROCEDURES

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STEP 8. Measure the power supply voltage at shift switch 
assembly connector E-115.
(1) Disconnect connector E-115 and measure at the harness 

side.

(2) Turn the ignition switch to the "ON" position.
(3) Transmission range should be "D" range.

(4) Measure the voltage between terminal 1 and ground.

• The voltage should measure battery positive voltage.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage battery positive voltage?

YES : Go to Step 11.
NO :  Go to Step 9.

STEP 9. Check transmission range switch connector C-04 
for loose, corroded or damaged terminals, or terminals 
pushed back in the connector.
Q: Are the connectors and terminals in good condition?

YES : Go to Step 10.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-

2

.

AC204176

CONNECTOR : E-115

BE

8

3

4 5

1

2

6 7

AC204918

8

3

7

2

5

6

4

1

AC204918 CH

E-115 HARNESS CONNECTOR : 
COMPONENT SIDE

AC204395

CONNECTOR : C-04

AF

C-04 (B)

4
9

5

10

3
8

2
7

6

1