Mitsubishi Montero (2004+). Manual — part 405
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-27
DTC 22: Stoplight Switch System
AC204904AB
Stoplight Switch System Circuit
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-28
AC205041
CONNECTORS: D-28, D-29
D-28
D-29
AB
D-28
D-29
AC205042
CONNECTOR: D-116
D-116
AB
1
2
3
4
AC204682AB
CONNECTOR: D-123
D-123
AC205043
CONNECTOR: D-125
D-125
AB
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-29
.
CIRCUIT OPERATION
• Battery positive voltage is supplied to the stop-
light switch (terminal 2 and 3).
• When the brake pedal is depressed, battery posi-
tive voltage is applied to the PCM (terminal 39
and 54).
.
DTC SET CONDITIONS
Check Condition
• The auto-cruise control indicator light illuminates.
Judgement Criteria
• Short in stop light switch circuit
• Open circuit in the brake switch circuit (between
PCM terminal 54 and ground)
.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
• Malfunction of the stoplight switch.
• Damaged harness or connector.
• Malfunction of the PCM.
DIAGNOSIS
.
Required Special Tools:
• MB991958: Scan tool (MUT-III sub assembly)
• MB991824: V.C.I.
• MB991827: MUT-III USB cable
• MB991911: MUT-III main harness B
• MB991223: Harness set
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.
AC205046
CONNECTOR: D-133
D-133(GR)
PCM
AB
AC205044
6
1
7
2
9
8
10
3
5
12
11
4
1314
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
CONNECTORS: E-110, E-111
E-111
E-110
E-111
E-110
AB
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-30
STEP 2. Using scan tool MB991958, read the diagnostic
trouble code.
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) Check for A/T system diagnostic trouble code.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC 26 set?
YES : Refer to GROP 23A, Diagnostic Trouble Code
Procedures
− DTC 26: Stoplight Switch System
NO : Go to Step 3.
STEP 3. Using scan tool MB991958, check data list item 06:
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 06 auto-cruise control system, Stoplight Switch.
• 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 4.
AC306409AF
MB991911
MB991824
MB991827
AC306409AF
MB991911
MB991824
MB991827
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