Mitsubishi Lancer Evolution X. Manual - part 113

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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SYMPTOM PROCEDURES

Inspection Procedure 1: When the Brake Pedal is Depressed, Cruise Control is not Cancelled.

.

COMMENT

• Malfunction of CAN bus line.
• The stoplight switch circuit is suspected.

.

TROUBLESHOOTING HINTS (THE MOST 
LIKELY CAUSES FOR THIS CASE:)

• Malfunction of CAN bus system.
• Damaged harness or connector.
• Malfunction of the stoplight switch.
• Malfunction of the ETACS-ECU.
• 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

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 4.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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STEP 2. 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".

Q: Is the switch operating properly?

YES : Go to Step 3
NO :  Repair the stoplight switch system (Refer to 

P.17-27

, 

Diagnostic Trouble Code Procedures − DTC 22: 

Stoplight Switch System.) Then go to Step 4.

STEP 3. Check the symptoms.
Q: When the brake pedal is depressed, 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 4.

STEP 4. Check the symptoms.
Q: When the brake pedal is depressed, is the cruise control 

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

CRUISE CONTROL

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ENGINE AND EMISSION CONTROL

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Inspection Procedure 2: When the Clutch Pedal is Depressed, Cruise Control is not Cancelled <M/T.>

.

CIRCUIT OPERATION

• Terminal number 85 of the ECM connector B-10 

monitors the clutch switch state.

• The clutch switch turns ON/OFF when the clutch 

pedal is depressed/released, and the input signal 
to the ECM changes. According to this change, 
the ECM judges the clutch switch status.

.

COMMENT

The cause is probably a malfunction of the clutch 
switch circuit.

.

TROUBLESHOOTING HINTS (THE MOST 
LIKELY CAUSES FOR THIS CASE:)

• Damaged harness or connector.
• Malfunction of the clutch switch.
• Malfunction of the ECM

AC805100AC

Clutch Switch System Circuit

AC709196 AB

B-10 (GR)

Connector: B-10

ECM

Air cleaner

AC709197

Connector: C-49

AD

CRUISE CONTROL

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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

• MB991223: Harness Set
• MB992006: Extra Fine Probe

STEP 1. Using scan tool MB991958, check data list item 78: 
Clutch 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 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".

Q: Is the switch operating properly?

YES : Go to Step 6.
NO :  Go to Step 2.

STEP 2. Check ECM connector B-10 and clutch switch 
connector C-49, for loose, corroded or damaged terminals, 
or terminals pushed back in the connector.
Refer to GROUP 00E, Harness Connector Inspection 

P.00E-2

.

Q: Is the connector and terminals in good condition?

YES : Go to Step 3.
NO :  Repair or replace the damaged connector. Then go to 

Step 7.

AC608435

Data link connector

MB991827

MB991824

MB991910

AB