Mitsubishi Montero (2004+). Manual — part 885
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
23A-115
STEP 6. Check the harness for open circuit or short circuit
to ground between stoplight switch connector D-123
terminal 2 and the power supply fuse.
Q: Is the harness wire in good condition?
YES : Go to Step 7.
NO : Repair or replace the harness wire.
STEP 7. Measure the stoplight switch output voltage to the
PCM at connector D-123 by backprobing.
(1) Remove the stoplight switch from the mounting bracket.
(2) Do not disconnect connector D-123.
(3) Measure the voltage between stoplight switch connector
D-123 terminal 1 and ground by backprobing.
• When the switch button is out (closed circuit), voltage
should equal battery positive voltage.
• When the switch button is depressed (open circuit), volt-
age should measure less than 1.0 volt.
Q: Is the measured voltage battery positive voltage with
the switch button released (closed circuit), and less
than 1.0 volt with the switch button depressed (open
circuit)?
YES : Go to Step 9.
NO : Go to Step 8.
STEP 8. Check the stoplight switch.
Refer to GROUP 35A, On-vehicle Service
− Stoplight Switch
Check
Q: Does the stoplight switch pass the checks?
YES : Go to Step 9.
NO : Replace the stoplight switch. Refer to GROUP 35A,
Brake Pedal
AC204170
CONNECTOR : D-123
CG
4
2
3
1
AC204170
CONNECTOR : D-123
CG
4
2
3
1
AC204918 BA
D-123 HARNESS CONNECTOR :
HARNESS SIDE
4
2
3
1
ACX02208
BRAKE PEDAL
STOPLIGHT
SWITCH
AD
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
23A-116
STEP 9. Measure the stoplight switch output voltage at
PCM connector D-133 by backprobing.
(1) Install the stoplight switch into the mounting bracket if it was
removed.
(2) Do not disconnect connector D-133.
(3) Measure the voltage between terminal 39 and ground by
backprobing.
• When the brake pedal is depressed, voltage should
measure battery positive voltage.
• When the brake pedal is not depressed, voltage should
measure less than 1.0 volt.
Q: Is the measured voltage battery positive voltage with
the brake pedal depressed (closed circuit), and less
than 1.0 volt with the brake pedal released (open
circuit)?
YES : Go to Step 12.
NO : Go to Step 10.
AC204681AD
CONNECTOR: D-133
D-133 (GR)
31 32
33 34
35 36 37 38 39 40 41 42 43
44 45 46 47 48 49
50 51
52 53
54 55 56
57 58
AC204918 BC
D-133 HARNESS CONNECTOR :
HARNESS SIDE
50
58
43
36 37
35
44
52
45
53
32
31
42
38 39 40 41
46
55
48
54
51
47
49
56
33 34
57
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
23A-117
STEP 10. Check joint connector D-29, D-116, intermediate
connector D-125, E-111 and PCM connector D-133 for
loose, corroded or damaged terminals, or terminals
pushed back in the connector.
AC204188
CONNECTORS : D-29, D-125
D-29
BA
D-125
D-125
D-29
9
8
6 7
5
3 4
20
32
21
33
43
17 18
30
41
16
29
28
39 40
13
25
12
24
35 36
14
26
37
15
27
38
19
31
42
1
10
22
2
11
23
34
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
AC204171
CONNECTOR : D-116
AN
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
AC204176
CONNECTOR : E-111
BF
15
4
14
37
36
26 27
12
11
35
34
23 24
3
13
25
9
2
8
32
20 21
6
5
17
29
30
18
1
7
19
31
10
22
33
16
28
38
AUTOMATIC TRANSMISSION DIAGNOSIS
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AUTOMATIC TRANSMISSION
23A-118
Q: Are the connectors and terminals in good condition?
YES : Go to Step 11.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
AC204681AD
CONNECTOR: D-133
D-133 (GR)
31 32
33 34
35 36 37 38 39 40 41 42 43
44 45 46 47 48 49
50 51
52 53
54 55 56
57 58
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