Mitsubishi Evolution X. Manual - part 220

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

17-49

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 

P.17-10

).

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

P.17-10

).

(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 

P.54C-14

). 

Then go to Step 11.

STEP 2. Using scan tool MB991958, check for MFI system 
DTC.
(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 MFI system DTC (Refer to GROUP 13A, 

Diagnosis 

− Diagnostic Function 

P.13A-9

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is any DTC set?

YES : Diagnose the MFI system (Refer to GROUP 13A, 

Diagnosis 

− Diagnostic Trouble Code Chart 

P.13A-44

). Then go to Step 11.

NO :  Go to Step 5 <M/T>.
NO :  Go to Step 3 <TC-SST>.

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 3. Using scan tool MB991958, check for TC-SST 
system DTC <TC-SST>.
(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 TC-SST system DTC (Refer to GROUP 22C, 

Diagnosis <TC-SST> 

− Diagnostic Function 

P.22C-6

).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
(5) Disconnect scan tool MB991958.
Q: Is any DTC set?

YES : Diagnose the TC-SST system (Refer to GROUP 22C, 

Diagnosis <TC-SST> 

− Diagnostic Trouble Code 

Chart 

P.22C-10

). Then go to Step 11.

NO :  Go to Step 4.

STEP 4. Using scan tool MB991958, check for shift lever 
system DTC <TC-SST>.
(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 shift lever system DTC (Refer to GROUP 22C, 

Diagnosis <shift lever> 

− Diagnostic Function 

P.22C-300

).

(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> 

− Diagnostic Trouble 

Code Chart 

P.22C-302

). Then go to Step 11.

NO :  Go to Step 5.

STEP 5. Check for DTC.
Read the cruise control system DTC (Refer to 

P.17-10

).

Q: Is DTC set?

YES : Diagnose the cruise control system (Refer to 

P.17-13

, 

Diagnostic Trouble Code Chart). Then go to Step 11.

NO :  Go to Step 6.

AUTO-CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 6. Using scan tool MB991958, check data list item 75: 
Cancel switch, item 86: Main switch, item 91: Resume 
switch and item 92: Set switch.
(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".

• Item 86: Main switch.

• When "ON/OFF" switch is at the "ON" position, the 

display on scan tool MB991958 should be "ON".

• When "ON/OFF" switch is at the "OFF" position, the 

display on scan tool MB991958 should be "OFF".

• Item 91: Resume switch.

• When "ACC/RES" switch is at the "ON" position, the 

display on scan tool MB991958 should be "ON".

• When "ACC/RES" switch is at the "OFF" position, 

the display on scan tool MB991958 should be 
"OFF".

• Item 92: Set switch.

• When "COAST/SET" switch is at the "ON" position, 

the display on scan tool MB991958 should be "ON".

• When "COAST/SET" 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 7.
NO :  Refer to 

P.17-14

, Diagnostic Trouble Code 

Procedures 

− DTC 15: Cruise Control Switch System. 

Then go to Step 11.

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ENGINE AND EMISSION CONTROL

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STEP 7. Using scan tool MB991958, check data list item 74: 
Brake light switch and item 89: Normally closed brake 
switch.
(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 74: Brake light switch.

• When the brake pedal is depressed, the display on 

scan tool MB991958 should be "ON".

• When the brake pedal is released, the display on 

scan tool MB991958 should be "OFF".

• Item 89: Normally closed brake switch.

• When the brake pedal is depressed, the display on 

scan tool MB991958 should be "ON".

• When the brake pedal is released, 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 8 <M/T>.
YES : Go to Step 9 <TC-SST>.
NO :  Refer to 

P.17-27

, Diagnostic Trouble Code 

Procedures 

− DTC 22: Stoplight Switch System. Then 

go to Step 11.

STEP 8. Using scan tool MB991958, check data list item 78: 
Clutch switch <M/T>.
(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 78: Clutch switch.

• When the clutch pedal is depressed, the display on 

scan tool MB991958 should be "ON".

• When the clutch pedal is released, 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 10.
NO :  Refer to 

P.17-41

, Symptom Procedures 

− Inspection 

Procedure 2. Then go to Step 11.