Mitsubishi Evolution X. Manual — part 219
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
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CAUTION
• If there is any problem in the CAN bus lines, an incor-
rect DTC may be set. Prior to this diagnosis, diagnose
the CAN bus lines.
• Whenever the ECM is replaced, ensure that the CAN
bus lines are normal.
STEP 1. Using scan tool MB991958, diagnose the CAN bus
line.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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
(Refer to
).
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line (Refer to
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is the check result satisfactory?
YES : Go to Step 2
NO : Repair the CAN bus lines (Refer to GROUP 54C,
Diagnosis
− Can Bus Diagnostic Chart
Then go to Step 6.
STEP 2. Using scan tool MB991958, check the shift lever
system data list item 01: Shift lever position.
(1) Connect scan tool MB991958 to the data link connector
(Refer to
).
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode for shift
lever system (Refer to GROUP 22C, Diagnosis <Shift
Lever>
).
• Item 1: Shift lever position.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is the switch operating properly?
YES : Go to Step 3.
NO : Diagnose the shift lever system (Refer to GROUP
22C, Diagnosis <shift lever>
− Diagnosis Code
Procedures
− No.P198E, 198F: Lever Position Switch
). Then go to Step 6.
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
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STEP 3. Using scan tool MB991958, read the shift lever
system diagnostic trouble code.
(1) Connect scan tool MB991958 to the data link connector
(Refer to
).
(2) Turn the ignition switch to the "ON" position.
(3) Check for shift lever system diagnostic trouble code (Refer
to GROUP 22C, Diagnosis <Shift Lever>
− Diagnostic
Function
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is any DTC set?
YES : Diagnose the shift lever system (Refer to GROUP
22C, Diagnosis <shift lever>
− Diagnosis Code Chart
). Then go to Step 6.
NO : Go to Step 4.
STEP 4. Using scan tool MB991958, check data list item 87:
Neutral switch.
(1) Connect scan tool MB991958 to the data link connector
(Refer to
).
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode for cruise
control system (Refer to
).
• Item 87: Neutral switch.
• When shift lever is at the "N" or "P" position, the dis-
play on scan tool MB991958 should be "ON".
• When shift lever is other than "N" or "P" position, the
display on scan tool MB991958 should be "OFF".
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is the switch operating properly?
YES : Go to Step 5.
NO : Replace the ECM [Refer to GROUP 13A, Engine
]. When the ECM is
replaced, register the encrypted code (Refer to
GROUP 42C, Diagnosis
− ID Code Registration
Judgment Table
STEP 5. Check the symptoms.
Q: When the shift lever is moved to "N" position, cruise
control system is cancelled?
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 : Replace the ECM [Refer to GROUP 13A, Engine
]. When the ECM is
replaced, register the encrypted code (Refer to
GROUP 42C, Diagnosis
− ID Code Registration
Judgment Table
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
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STEP 6. Check the symptoms.
Q: When the shift lever is moved to "N" position, cruise
control system is cancelled?
YES : The procedure is complete.
NO : Return to Step 1.
INSPECTION PROCEDURE 4: When the Cruise Control "CANCEL" Switch is Set to ON, Cruise Control
System is not Cancelled.
.
COMMENT
The cause is probably an open-circuit in the output
circuit inside the "CANCEL" switch.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CASE:)
• Malfunction of the cruise control switch.
• Malfunction of the ECM.
DIAGNOSTIC PROCEDURE
STEP 1. Using scan tool MB991958, check the data list
item 75: Cancel switch.
AC608435
Data link connector
MB991827
MB991824
MB991910
AB
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
(Refer to
).
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode for cruise
control system (Refer to
).
• Item 75: Cancel switch.
• When "CANCEL" switch is at the "ON" position, the
display on scan tool MB991958 should be "ON".
• When "CANCEL" switch is at the "OFF" position, the
display on scan tool MB991958 should be "OFF".
(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is the switch operating properly?
YES : Go to Step 2.
NO : Refer to
, Diagnosis Code Procedures
− DTC
15: Cruise Control Switch System. Then go to Step 3.
AUTO-CRUISE CONTROL
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ENGINE AND EMISSION CONTROL
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STEP 2. Retest the system.
Q: Does the cruise control "CANCEL" switch set to ON,
cruise control system is cancelled?
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 : Replace the ECM [Refer to GROUP 13A, Engine
]. When the ECM is
replaced, register the encrypted code (Refer to
GROUP 42C, Diagnosis
− ID Code Registration
Judgment Table
STEP 3. Retest the system.
Q: Does the cruise control "CANCEL" switch set to ON,
cruise control system is cancelled?
YES : The procedure is complete.
NO : Return to Step 1.
INSPECTION PROCEDURE 5: Cruise Control Cannot be Set ("COAST/SET" or "ACC/RES" Switch
Operation is not Available).
.
COMMENT
The fail-safe function is probably canceling cruise
control system. In this case, checking the cruise con-
trol system, MFI system, TC-SST system <TC-SST>,
shift lever system <TC-SST> and CAN bus line sys-
tem DTCs. The scan tool MB991958 can also be
used to check if the circuits of each input switch are
normal or not by checking the input switch codes.
NOTE: Press the cruise control switches one by one
securely. Otherwise, the cruise control system may
not be started.
.
TROUBLESHOOTING HINTS (THE MOST
LIKELY CAUSES FOR THIS CASE:)
• Malfunction of the CAN bus line system.
• Malfunction of the MFI system.
• Malfunction of the TC-SST system <TC-SST>.
• Malfunction of the shift lever system <TC-SST>.
• Malfunction of the cruise control switch.
• Malfunction of the stoplight switch.
• Malfunction of the clutch switch <M/T>.
• Malfunction of the TC-SST-ECU <TC-SST>.
• Malfunction of the shift lever ECU <TC-SST>.
• Malfunction of the ECM.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: M.U.T.-III USB Cable
• MB991910: M.U.T.-III Main Harness A
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