Mitsubishi Montero (2004+). Manual - part 887

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-123

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CIRCUIT OPERATION

• Battery positive voltage is applied to the transmis-

sion range switch (terminal 7) when the ignition 
switch is turned "ON."

• Battery positive voltage is applied to the PCM 

(terminal 66) when the selector lever is in the "P" 
range. The PCM judges that the selector lever is 
in the "P" range when the battery positive voltage 
is applied.

• Battery positive voltage is applied to the PCM ter-

minal 67 (75 or 76) when the selector lever is in 
the "R" range ("N" or "D" range). The PCM judges 
that the selector lever is in the "R" range ("N" or 
"D" range) when the battery positive voltage is 
applied.

.

DESCRIPTIONS OF MONITOR METHODS
If no signal is input from transmission range switch 
for more than 30 seconds, PCM judges that trans-
mission range switch has a failure.

.

MONITOR EXECUTION
Continuous

.

MONITOR EXECUTION CONDITIONS (OTHER 
MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

AC204191

CONNECTORS : D-208, D-212

5 6

2

4

3

1

JUNCTION BLOCK
(FRONT VIEW)

3

10

9

4

11

8

7

1

5

2

6

D-208

D-208

D-212

D-212

AS

AC204194

E-113

E-113

E-11

E-11

BE

E-115

E-115

E-114

E-111, E-114

3

10

16

9

7 8

6

1

4

2

5

11

14

1213

15

1

6

2

7 8 9 10 11 12 13 14

3 4 5

E-111

CONNECTORS : E-11, E-111, E-113, E-114, 
                             E-115

38

28

16

33

22

10

31

19

7

1

18

30

29

17

5

6

21

20

32

8

2

9

25

13

3

24

23

3435

1112

27

26

3637

14

4

15

8

3

4 5

1

2

6 7

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-124

LOGIC FLOW CHARTS (Monitor Sequence)

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DTC SET CONDITIONS

Check Conditions, Judgement Criteria

• Transmission range switch: no signal detected. 

(30 seconds)

.

OBD-II DRIVE CYCLE PATTERN
Start the engine, keep the vehicle stopped in P, R, N 
and D ranges respectively for more than one minute, 
and turn "LOCK" (OFF) the ignition switch. Then 
restart the engine, and stop the vehicle in P, R, N and 
D ranges respectively for more than one minute.

.

TROUBLESHOOTING HINTS (THE MOST LIKELY 
CAUSES FOR THIS CODE TO BE SET ARE:)

• Malfunction of the transmission range switch

• Malfunction of the ignition switch

• 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

AC205064

START

Is there no
input signal?

Yes

No

Continuous failure
for 30 secs.

Yes

Yes

Yes

No

No

No

Continuous failure
for 30 secs.

Is there more than
one input signal?

Malfunction

Good

Malfunction

END

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-125

STEP 1. Using scan tool MB991958, check data list item 61: 
Transmission Range Switch.

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) Set scan tool MB991958 to the data reading mode.

• Item 61: Transmission Range Switch.

• Move the selector lever to "P," "R," "N," "D" and sport 

mode positions and confirm that the selected trans-
mission ranges match the positions shown on scan 
tool MB991958 (Sport mode is indicated as "D" on 
scan tool MB991958).

(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 (no correct transmission range is displayed) : Go to 

Step 2.

NO (Only "P" position is not displayed correctly) : Go to 

Step 6.

NO (Only "R" position is not displayed correctly) : Go to 

Step 14.

NO (Only "N" position is not displayed correctly) : Go to 

Step 21.

NO (Only "D" position is not displayed correctly) : Go to 

Step 28.

NO [Only sport mode position is not displayed correctly 
("D" is not displayed).] : Go to Step 36.

STEP 2. Check the transmission range switch.
Measure the resistance between the terminals for each trans-
mission range as indicated in the table below.

Q: Is the measured resistance less than 2 ohms for each 

transmission range?
YES : Go to Step 3.
NO :  Replace the transmission range switch. Refer to 

GROUP 23B, Transmission 

P.23B-14

.

AC307591 AC

MB991911

MB991824

MB991827

AC307591

DATA LINK

CONNECTOR

TRANSMISSION 
RANGE

TERMINAL 
CONNECTION OF 
TESTER

SPECIFIED 
CONDITION

P

1 

− 7

Less than 2 ohms.

R

7 

− 8

N

2 

− 7

D

3 

− 7

ACX01187AD

P

R

N

D

AUTOMATIC TRANSMISSION DIAGNOSIS

TSB Revision

AUTOMATIC TRANSMISSION

23A-126

STEP 3. Check transmission range switch connector C-04, 
joint connector D-01, junction block connector D-212 and 
intermediate connector E-11 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 4.
NO :  Repair or replace the damaged components. Refer to 

GROUP 00E, Harness Connector Inspection 

P.00E-2

.

AC204395

CONNECTOR : C-04

AF

C-04 (B)

4
9

5

10

3
8

2
7

6

1

AC204170

CONNECTOR : D-01

CD

9 10

8

6 7

31 32

30

29

18 19 20 21

5

4

2

1

3

27

26

24

23

25

12 13 14 15 16 17

28

11
22
33

AC204173

CONNECTOR : D-212

AZ

3

10

9

4

11

8

7

1

5

2

6

JUNCTION BLOCK
(FRONT VIEW)

AC204176

CONNECTOR : E-11

AZ

3

10

16

9

7 8

6

1

4

2

5

11

14

1213

15