Mitsubishi Montero (2002-2004). Manual — part 955
DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
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STEP 6. 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 8.
NO : Go to Step 7.
STEP 7. 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 8.
NO : Replace the stoplight switch. Refer to GROUP 35A,
Brake Pedal
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
DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
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STEP 8. Measure the stoplight switch output voltage at
transfer-ECU connector E-104 by backprobing.
(1) Install the stoplight switch into the mounting bracket if it was
removed.
(2) Do not disconnect connector E-104.
(3) Measure the voltage between terminal 34 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 11.
NO : Go to Step 9.
AC204176
CONNECTOR : E-104
BA
51
40
3839
50
41
52
48
37
46
35
47
36
45
34
43
32
44
33
49
42
31
AC204918 BV
E-104 HARNESS CONNECTOR :
HARNESS SIDE
51
40
3839
50
41
52
48
37
46
35
47
36
45
34
43
32
44
33
49
42
31
DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
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STEP 9. Check joint connector D-29, intermediate
connector D-125, E-11 and transfer-ECU connector E-104
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
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
AC204194
CONNECTORS : E-11, E-104
E-104
E-104
E-11
E-11
AV
51
40
3839
50
41
52
48
37
46
35
47
36
45
34
43
32
44
33
49
42
31
3
10
16
9
7 8
6
1
4
2
5
11
14
1213
15
DIAGNOSTIC TROUBLE CODE PROCEDURES <TRANSFER>
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DIAGNOSTIC TROUBLE CODE PROCEDURES
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STEP 10. Check the harness for open circuit or short
circuit to ground between stoplight switch connector D-
123 terminal 1 and transfer-ECU connector E-104 terminal
34.
Q: Is the harness wire in good condition?
YES : Go to Step 11.
NO : Repair or replace the harness wire.
STEP 11. Using scan tool MB991502, check data list item
23: Stoplight 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 23,
Stoplight Switch
− Active Trac 4WD II.
• When the brake pedal is depressed, the display on scan
tool MB991502 should be "ON."
• When the brake pedal is not depressed, the display on
scan tool MB991502 should be "OFF."
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?
YES : If 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
NO : Replace the PCM.
AC204170
CONNECTOR : D-123
CG
4
2
3
1
AC204176
CONNECTOR : E-104
BA
51
40
3839
50
41
52
48
37
46
35
47
36
45
34
43
32
44
33
49
42
31
ACX01539AD
MB991502
16-PIN
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