Mitsubishi Montero (2004+). Manual — part 402
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-15
DIAGNOSTIC TROUBLE CODE CHART
M1172002200325
Check according to the inspection chart that is
appropriate for the diagnostic trouble code.
DIAGNOSTIC TROUBLE CODE PROCEDURES
DTC15 : Auto-cruise Control Switch System
DIAGNOSTIC TROUBLE
CODE NO.
INSPECTION ITEM
REFERENCE PAGE
15
Auto-cruise control switch system
21
Cancel latch signal system
22
Stoplight switch system
23
Powertrain control module (PCM) and its related
components
AC204903AB
Auto-cruise Control Switch System Circuit
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-16
.
CIRCUIT OPERATION
This circuit judges the signals of each switch ("SET,"
"RESUME" and "CANCEL") of the auto-cruise con-
trol switch. The PCM detects the state of the
auto-cruise control switch by sensing the voltages
shown below.
• When all switches are OFF: 4.7 − 5.3 volts
• When the "MAIN" switch is ON: 0 − 0.3 volt
• When the "SET" switch is ON: 2.1 − 2.7 volts
• When the "RESUME" switch is ON: 3.3 − 4.0
volts
• When the "CANCEL" switch is ON: 0.8 − 1.5 volts
.
DTC SET CONDITIONS
Check Condition
• The auto-cruise control indicator light illuminates.
Judgement Criteria
• The "SET" or "RESUME" switch remains on for
60 seconds.
.
TROUBLESHOOTING HINTS (The most likely
causes for this case:)
• Malfunction of the auto-cruise control switch.
• Malfunction of the clock spring.
• Damaged harness or connector.
• Malfunction of the PCM.
AC205036
CONNECTORS: D-135, D-136
D-135(GR)
PCM
AB
D-136(GR)
D-135
D-136
1 2 3
5
4
6
AC205037
2
1
3
CONNECTORS: D-205, D-226, D-227, D-230
D-227
D-226
D-205(B)
D-227
D-226
D-205
D-230(B)
D-230
AB
AC205045
6
1
7
2
9
8
10
3
5
12
11
4
1314
E-110
CONNECTOR: E-110
AB
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-17
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. Using scan tool MB991958, check data list item 02:
Set Switch, item 03: Resume 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 02 auto-cruise control system, Set Switch.
• When "SET" switch is at the ON position, the display
on scan tool MB991958 should be "ON."
• When "SET" switch is at the OFF position, the dis-
play on scan tool MB991958 should be "OFF."
(4) Set scan tool MB991958 to data reading mode.
Item 03 auto-cruise control system, Resume Switch.
• When "RESUME" switch is at the ON position, the
display on scan tool MB991958 should be "ON."
• When "RESUME" switch is at the OFF position, the
display on scan tool MB991958 should be "OFF."
(5) 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 2.
STEP 2. Check auto-cruise control switch connector D-227
for looser, corroded or damaged terminals, or terminals
pushed back in the connector.
Q: Are the connector and terminals in good condition?
YES : Go to Step 3.
NO : Repair or replace the damaged components. Refer to
GROUP 00E, Harness Connector Inspection
AC306409AF
MB991911
MB991824
MB991827
AC205038AB
D-227
CONNECTOR: D-227
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-18
STEP 3. Check the auto-cruise control switch.
(1) Disconnect auto-cruise control switch
(2) Measure the resistance between terminal 2 and terminal 3
when each of the "SET", "RESUME", "CANCEL" and MAIN
switch is pressed.
Q: Is the resistance within specifications?
YES : Go to Step 4.
NO : Replace the auto-cruise control switch. Refer to
, Auto-cruise Control.
STEP 4. Measure the auto-cruise control switch power
supply voltage at connector D-227 by backprobing.
(1) Do not disconnect connector D-227.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 2 and ground by
backprobing.
• When "SET" switch is at the ON position, voltage should
measure between 2.1 and 2.7 volts.
• When "RESUME" switch is at the ON position, voltage
should measure between 3.3 and 4.0 volts.
Q: Is the measured voltage within specifications?
YES : Go to Step 5.
NO : Go to step 6.
SWITCH POSITION
SPECIFIED CONDITION
MAIN switch "OFF"
Open circuit
MAIN switch "ON"
Less than 2 ohms
"CANCEL" switch ON
Approximately 100
Ω
"RESUME" switch ON
Approximately 887
Ω
"SET" switch ON
Approximately 300
Ω
1 2 3
AC203822AB
OFF
OFF
OFF
OFF
ON
ON
ON
ON
CAN
MAIN
RES
SET
2
3
AC205038AB
D-227
CONNECTOR: D-227
1 2 3
AC205053AB
D-227 HARNESS
CONNECTOR:
HARNESS SIDE
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