Mitsubishi Evolution X. Manual - part 219

AUTO-CRUISE CONTROL

TSB Revision

ENGINE AND EMISSION CONTROL

17-45

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 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 

P.17-10

).

(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> 

− Diagnostic Function 

P.22C-300

).

• 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 

P.22C-304

). 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 

P.17-10

).

(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 

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> 

− Diagnosis Code Chart 

P.22C-302

). 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 

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 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 

Control Module (ECM) 

P.13A-920

]. 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 6.

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 

P.00-15

).

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

Control Module (ECM) 

P.13A-920

]. 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 6.

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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 

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".

(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 

P.17-14

, 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 

P.00-15

).

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

Control Module (ECM) 

P.13A-920

]. 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. 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