Mitsubishi Lancer Evolution X. Manual - part 115

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-47

STEP 6. Check the symptoms.
Q: When the shift lever is moved to "N" position, is the 

cruise control 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 

P.00-15

.)

NO :  Replace the ECM [Refer to GROUP 13A, Engine 

Control Module (ECM) 

P.13A-888

.] When the ECM is 

replaced, register the encrypted code (Refer to 
GROUP 42C, Diagnosis − ID Code Registration 

Judgment Table 

P.42C-9

.) Then go to Step 7.

STEP 7. Check the symptoms.
Q: When the shift lever is moved to "N" position, is the 

cruise control cancelled?
YES : The procedure is complete.
NO :  Return to Step 1.

Inspection Procedure 4: When the "CANCEL" Switch is Pressed, Cruise Control 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

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

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 1. Using scan tool MB991958, check the data list 
item 75: Cancel 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 

(Refer to 

P.17-10

.)

(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to data reading mode for cruise 

control system (Refer to 

P.17-10

.)

• 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".

Q: Is the switch operating properly?

YES : Go to Step 2.
NO :  Repair the cruise control switch system (Refer to 

P.17-14

, Diagnosis Code Procedures − DTC 15: 

Cruise Control Switch System.) Then go to Step 3 .

STEP 2. Check the symptoms.
Q: When the "CANCEL" switch is pressed, is the cruise 

control 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 

P.00-15

.)

NO :  Replace the ECM [Refer to GROUP 13A, Engine 

Control Module (ECM) 

P.13A-888

.] When the ECM is 

replaced, register the encrypted code (Refer to 
GROUP 42C, Diagnosis − ID Code Registration 

Judgment Table 

P.42C-9

.) Then go to Step 3.

STEP 3. Check the symptoms.
Q: When the "CANCEL" switch is pressed, is the cruise 

control cancelled?
YES : The procedure is complete.
NO :  Return to Step 1.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-49

Inspection Procedure 5: Cruise Control cannot be Set (No Response "COAST/SET" Switch and 
"ACC/RES" Switch is Pressed.)

.

COMMENT

• The fail-safe function is probably canceling cruise 

control system. In this case, checking the cruise 
control system, MFI system, TC-SST system, 
shift lever system and CAN bus line system 
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 data list.

• In addition, if the option coding data written into 

the ECM is not normal, the cruise control system 
does not work.

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.
• ECM option coding data error 
• 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.

DIAGNOSTIC PROCEDURE

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

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 incorrect 
diagnostic trouble code (DTC) may be set. Prior to this 
diagnosis, diagnose the CAN bus lines (Refer to GROUP 
54C, Trouble code diagnosis 

P.54C-9

.)

STEP 1. Using scan tool MB991958, diagnose the CAN bus 
line.

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 

P.17-10

.)

(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line (Refer to 

P.17-10

.)

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 

P.54C-15

). 

Then go to Step 12.

STEP 2. Using scan tool MB991958, check for ECM option 
coding data.
(1) Connect scan tool MB991958 to the data link connector 

(Refer to 

P.17-10

.)

(2) Turn the ignition switch to the "ON" position.
(3) Check for ECM option coding data (Refer to GROUP 00, 

Precautions Before Service − Coding List 

P.00-26

.)

Q: Is the cruise control item of the ECM option coding data 

enabled?
YES : Go to Step 3.
NO :  Set the ECM option coding data again. (Refer to 

GROUP 00, Precautions Before Service − Coding List 

P.00-26

.) Then go to Step 12.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB