Mitsubishi Montero (2004+). Manual — part 966
TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>
TSB Revision
AUTOMATIC TRANSMISSION
23A-439
DTC 26: Stoplight Switch System
ACX02034AD
Stoplight Switch System Circuit
TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>
TSB Revision
AUTOMATIC TRANSMISSION
23A-440
.
CIRCUIT OPERATION
• Battery positive voltage is supplied to the stop-
light switch (terminal 2).
• When the brake pedal is depressed, battery posi-
tive voltage is applied to the transfer-ECU (termi-
nal 34).
.
DTC SET CONDITIONS
In the case that the stoplight switch is continuously
turned ON for 15 minutes at the vehicle speed of 15
km/h (9.3 mph) and over, the DTC 26 is set as the
short circuit of the stoplight switch.
.
TROUBLESHOOTING HINTS (THE MOST LIKELY
CAUSES FOR THIS CODE TO BE SET ARE:)
• Malfunction of the stoplight switch circuit
• Damaged harness, connector
• Malfunction of the transfer-ECU
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
STEP 1. Check the brake pedal height.
Refer to GROUP 35A, On-vehicle Service
− Brake Pedal
Check and Adjustment
Q: Is the height adjusted properly?
YES : Go to Step 2.
NO : Adjust the brake pedal to the proper height.
AC204188
CONNECTORS : D-28, D-29, D-123, D-125
D-28
D-28
D-29
AZ
D-123
D-123
D-125
D-125
D-29
4
2
3
1
2 3
27
32
28
33
16
15
4 5
19
18
29
17
34
7 8
35
22
21
9 10
30
36
31
37
25
24
23
6
20
1
14
26
11
13
12
38
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
TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>
TSB Revision
AUTOMATIC TRANSMISSION
23A-441
STEP 2. Using scan tool MB991958, check data list item 23:
Stoplight 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 data reading mode.
• Item 23: Stoplight Switch − Active Trac 4WD II.
• When the brake pedal is depressed, the display on
scan tool MB991958 should be "ON."
• When the brake pedal is not depressed, the display
on scan tool MB991958 should be "OFF."
(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
.
NO : Go to Step 3.
STEP 3. Measure the stoplight switch power supply
voltage 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 terminal 2 and ground by
backprobing.
• The voltage should measure battery positive voltage.
Q: Is the measured voltage battery positive voltage?
YES : Go to Step 6.
NO : Go to step 4.
AC307591 AC
MB991911
MB991824
MB991827
AC307591
DATA LINK
CONNECTOR
AC204170
CONNECTOR : D-123
CG
4
2
3
1
AC204918 BB
D-123 HARNESS CONNECTOR :
HARNESS SIDE
4
2
3
1
TRANSFER DIAGNOSIS <ACTIVE TRAC AWD II>
TSB Revision
AUTOMATIC TRANSMISSION
23A-442
STEP 4. Check stoplight switch connector D-123,
intermediate connector D-28 and D-125 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 5.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
STEP 5. 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 6.
NO : Repair or replace the harness wire.
AC204188
CONNECTORS : D-28, D-123, D-125
D-28
D-28
AY
D-123
D-123
D-125
D-125
4
2
3
1
2 3
27
32
28
33
16
15
4 5
19
18
29
17
34
7 8
35
22
21
9 10
30
36
31
37
25
24
23
6
20
1
14
26
11
13
12
38
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
AC204170
CONNECTOR : D-123
CG
4
2
3
1
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