Mitsubishi Montero (2002-2004). Manual — part 903

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

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DIAGNOSTIC TROUBLE CODE PROCEDURES

23Ac-95

.

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.

.

DTC SET CONDITIONS
If the PCM detects no Transmission Range switch
input signal from any selector position for a continu-
ous period of thirty seconds or more, it is judged that
there is an open circuit in the transmission range
switch and DTC 27 is set.

.

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

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

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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DIAGNOSIS

Required Special Tool:

• MB991502: Scan Tool (MUT-II)

STEP 1. 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.

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

mode positions and confirm that the selected transmis-
sion ranges match the positions shown on scan tool
MB991502. (Sport mode is indicated as "D" on scan tool
MB991502.)

(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 : When the transmission range does not match any of

the positions shown on scan tool MB991502: Go to
Step 2. When the transmission range does not match
the "P" position on scan tool MB991502: Go to Step 6.
When the transmission range does not match the "R"
position on scan tool MB991502: Go to Step 14 .
When the transmission range does not match the "N"
position on scan tool MB991502: Go to Step 21.
When the transmission range does not match the "D"
position on scan tool MB991502: Go to Step 28.
When the transmission range does not match the
sport mode position on scan tool MB991502 (agrees
at "D" position): Go to Step 36.

ACX01539AD

MB991502

16-PIN

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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STEP 2. Check the transmission range switch.
Measure the resistance between the terminals for each selec-
tor position as indicated in the table above

Q: Does the resistance measure less than 2 ohms for each

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

GROUP 23B, Transmission

P.23B-18

.

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

DIAGNOSTIC TROUBLE CODE PROCEDURES <AUTOMATIC TRANSMISSION>

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DIAGNOSTIC TROUBLE CODE PROCEDURES

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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