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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 54 (Adaptive Cruise Control System (Acc) & Emission Control (MFI) - With Diagnostics) >> Adaptive Cruise Control (Acc) System Diagnosis >> Symptom Procedures >> Inspection Procedure 3: The Cruise Control is Cancelled Although The Switch is not Operated During The ACC Operation >> Diagnosis

Inspection Procedure 3: The Cruise Control is Cancelled Although The Switch is not Operated During The ACC Operation: Diagnosis

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:
  • If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be stored. Prior to this diagnosis, diagnose the CAN bus lines.
  • Before replacing the ECU, ensure that the CAN bus lines is normal.
  1. STEP 1. Diagnose the CAN bus line. 
    CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
    1. Connect scan tool (M.U.T.-III). Refer to "HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ."
    2. Turn the ignition switch to the "ON" position.
    3. Diagnose the CAN bus line. (Refer to EXPLANATION ABOUT THE SCAN TOOL (M.U.T.-III) CAN BUS DIAGNOSTICS )
    4. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Is the check result satisfactory? 

    1. YES:  Go to Step 2.
    2. NO:  Repair the CAN bus lines (Refer to CAN BUS DIAGNOSTIC TABLE ). Then go to Step 2.
  2. STEP 2. Check the diagnostic trouble code is stored again. 

    Q: Is diagnostic trouble code stored? 

    1. YES:  Repair the adaptive cruise control system (ACC) (Refer to CHECK OF THE FREEZE FRAME DATA  ).
    2. NO:  Go to Step 3.
  3. STEP 3. Check the other system diagnostic trouble code. 

    Using scan tool (M.U.T.-III), perform MFI system diagnostic trouble code (Refer to DIAGNOSIS FUNCTION < 2.4L ENGINE >, DIAGNOSIS FUNCTION < 3.0L ENGINE >).

    Q: Is any diagnostic trouble code stored? 

    1. YES:  Repair the MFI system (Refer to DIAGNOSTIC TROUBLE CODE CHART < 2.4L ENGINE >, DIAGNOSTIC TROUBLE CODE CHART < 3.0L ENGINE >).
    2. NO:  Go to Step 4.
  4. STEP 4. Check the other system diagnostic trouble code. 

    Using M.U.T.-III, perform ASC system diagnostic trouble code (Refer to DIAGNOSIS FUNCTION ).

    Q: Is the diagnostic trouble code stored? 

    1. YES:  Repair the ASC system (Refer to DIAGNOSTIC TROUBLE CODE CHART ).
    2. NO:  Go to Step 5.
  5. STEP 5. Check the other symptom. 

    The system should be turned on when the cruise control switch is operated.

    Q: Is the system turned on by operating the cruise control switch? 

    1. YES:  Go to Step 6.
    2. NO:  Refer to "When the cruise control switch is operated, the system is not turned on." (Refer to INSPECTION PROCEDURE 7: WHEN THE CRUISE CONTROL SWITCH IS OPERATED, THE SYSTEM IS NOT TURNED ON )
  6. STEP 6. Check the cruise control switch. 

    Refer to RETURN TO THE SET SPEED BEFORE CANCELLATION AND CRUISE CONTROL CANCELLATION .

    Q: Is the check result normal? 

    1. YES:  Go to Step 7.
    2. NO:  Replace the cruise control switch (Refer to RADAR CALIBRATION  ).
  7. STEP 7. Check the symptom. 
    1. Drive the vehicle for approx. three minutes.

    Q: Is the cruise control cancelled? 

    1. YES:  Replace the ACC/FCM-ECU (Refer to ACC/FCM-ECU  ).
    2. NO:  It can be assumed that this malfunction is intermittent (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
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