Mitsubishi Montero (2002-2004). Manual — part 836
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-7
AUTO-CRUISE CONTROL
GENERAL DESCRIPTION
M1172000100225
By using the auto-cruise control, the driver can select
and maintain a desired cruising speed [approxi-
mately 40 km/h (25 mph) or more] without depress-
ing the accelerator pedal.
CONSTRUCTION DIAGRAM
AC204216
3
11
1 2
9 10
14
6
5
4
1213
8
7
16
15
AC204217
AC204447
20
20
40
60
80
100 120
140
160
180
200
40
60
80
100
120
km/h
AC204919
AUTO-CRUISE
CONTROL
INDICATOR
LIGHT
ACCELERATOR
PEDAL
POSITION
SENSOR
TRANSMISSION
RANGE SWITCH
STOPLIGHT
SWITCH
THROTTLE BODY
ASSEMBLY
POWERTRAIN
CONTROL
MODULE (PCM)
AB
VEHICLE
SPEED
SENSOR
AUTO-CRUISE
CONTROL SWITCH
MAIN SWITCH
DATA LINK
CONNECTOR
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-8
SPECIAL TOOLS
M1172000600220
AUTO-CRUISE CONTROL SYSTEM DIAGNOSIS
INTRODUCTION TO AUTO-CRUISE CONTROL SYSTEM DIAGNOSIS
M1172003300217
The auto-cruise control system allows driving without
stepping on the accelerator pedal by setting a ran-
dom speed between 40 km/h (25 mph) and 200 km/h
(124 mph). Problems in this system can be investi-
gated by the following methods.
Auto-cruise control system diagnostic
trouble codes
The auto-cruise control system consists of the
powertrain control module (PCM), control switches
and sensors. The control switches and sensors mon-
itor the state of the vehicle. The PCM controls the
throttle valve opening angle in the throttle body in
accordance with the input signals from the switches
and sensors. If the PCM detects a problem on any of
those components, the PCM estimates where the
problem may be occurring, and will output a diagnos-
tic trouble code. Diagnostic trouble codes cover the
auto-cruise control switch, stoplight switch and PCM.
AUTO-CRUISE CONTROL SYSTEM DIAGNOSTIC TROUBLESHOOTING STRATEGY
M1172002000224
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will check most of the
possible causes of an auto-cruise control system
problem.
TOOL
TOOL NUMBER AND
NAME
SUPERSESSION
APPLICATION
MB991502 Scan tool
(MUT-II)
MB991496-OD
Reading diagnostic
trouble codes
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222
Harness set
A: Inspection harness
B: LED harness
C: LED harness adapter
D: Probe
General service tools
Checking the continuity
and measuring the
voltage at the harness
connector
MB991348
Test harness set
MB991348-01
Checking throttle position
sensor
B991502
MB991223
A
D
C
B
AD
MB991348
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-9
1. Gather information from the customer.
2. Verify that the condition described by the
customer exists.
3. Check the vehicle for any auto-cruise control
system DTC.
4. If you can verify the condition but no auto-cruise
control system DTCs are set, and the malfunction
may be intermittent. Refer to GROUP 00, How to
Use Troubleshooting/Inspection Service Points
−
How to Cope with Intermittent Malfunctions
5. If you can verify the condition but there are no
auto-cruise control system DTCs, or the system
cannot communicate with scan tool MB991502,
refer to Symptom Chart
and find the fault.
6. If there is an auto-cruise control system DTC,
record the number of the code, then erase the
code from vehicle memory using the scan tool.
7. Re-create the auto-cruise control system DTC set
conditions to see if the same Auto-cruise Control
System DTC will set again.
• If the same Auto-cruise Control System DTC sets
again, perform the diagnostic procedures for the
set code. Refer to
, Auto-cruise Control
System Diagnostic Trouble Code Chart.
AUTO-CRUISE CONTROL SYSTEM DIAGNOSTIC
TROUBLE CODE DIAGNOSIS
M1172002100210
Retrieving Auto-cruise Control System
Diagnostic Trouble Codes.
.
Using scan tool MB991502
Required Special Tool:
• MB991502: Scan Tool (MUT-II)
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. Depress the auto-cruise control main switch to illuminate the
auto-cruise control indicator light in the combination meter.
4. Use scan tool MB991502 to check for auto-cruise control
system diagnostic trouble codes.
5. Turn the ignition switch to the "LOCK" (OFF) position.
6. Disconnect scan tool MB991502.
.
Using a Auto-cruise Control Indicator Light
1. Turn the ignition switch to the "ON" position while holding
the auto-cruise control switch in the "SET" position (down).
Then, within one second, more the cruise control switch up
to the "RES" position.
2. Read a diagnostic trouble code by observing the flash
display pattern of the auto-cruise control indicator light in the
combination meter.
ACX02258AC
MB991502
16-PIN
ACX01172
AB
AUTO-CRUISE
CONTROL
SWITCH
SET
SWITCH: ON
RESUME
SWITCH: ON
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
17-10
DIAGNOSTIC RESULT DISPLAY METHOD WHEN USING THE AUTO-CRUISE
CONTROL INDICATOR LIGHT
NOTE: Other on-board diagnostic items are also out-
put as voltage waveforms corresponding to diagnos-
tic trouble code numbers.
Erasing Diagnostic Trouble Codes
The diagnostic trouble codes can be erased by the following
procedure.
NOTE: The diagnostic trouble code will not be erased even if
the negative battery terminal is disconnected.
.
Using scan tool MB991502
Required Special Tool:
• MB991502: Scan Tool (MUT-II)
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. Use scan tool MB991502 to check for auto-cruise control
system diagnostic trouble codes.
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991502.
.
WHEN THE DIAGNOSTIC TROUBLE CODE NO.23 IS SET WHEN NO DIAGNOSTIC TROUBLE CODE
IS SET
AC204251AB
ILLUMINATED
NOT ILLUMINATED
PAUSE
TIME: 3s
1.5s 0.5s
TENS
SIGNAL
PLACE
DIVISION:
2s
UNITS
SIGNAL
0.5s
AC204252
CONTINUOUS ON AND OFF
SIGNALS AT INTERVALS OF 0.5 s
AB
0.5 s
ILLUMINATED
NOT ILLUMINATED
ACX02258AC
MB991502
16-PIN
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