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Home >> Mitsubishi >> 2014 >> Lancer ES Sportback >> Repair and Diagnosis >> External Pages >> Different car >> Section 65 (Cruise Control System - With Diagnostics) >> Cruise Control System Diagnosis >> Symptom Procedures >> Inspection Procedure 5: Hunting (Repeated Acceleration and Deceleration) Occurs at the Set Vehicle Speed >> Diagnosis

Inspection Procedure 5: Hunting (Repeated Acceleration and Deceleration) Occurs at the Set Vehicle Speed: 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 6.
  2. STEP 2. Check the transaxle system diagnostic trouble code. 

    Using scan tool (M.U.T.-III), perform transaxle system diagnostic trouble code (Refer to DIAGNOSIS FUNCTION < CVT >, DIAGNOSIS FUNCTION < A/T >).

    Q: Is any diagnostic trouble code stored? 

    1. YES:  Repair the transaxle system (Refer to DIAGNOSTIC TROUBLE CODE CHART < CVT >, DIAGNOSTIC TROUBLE CODE CHART < A/T >). Then go to  Step 6.
    2. NO:  Go to Step 3.
  3. STEP 3. Check the MFI 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 >). Then go to  Step 6.
    2. NO:  Go to Step 4.
  4. STEP 4. Check the data list. 

    Using scan tool (M.U.T.-III), check the data list (Refer to DATA LIST REFERENCE TABLE  ).

    • Item 04: Vehicle speed signal

    Q: Is the check result normal? 

    1. YES:  Go to Step 5.
    2. NO:  Replace the ECM (Refer to ECM < 2.4L ENGINE >, ECM < 3.0L ENGINE >). Then go to  Step 6.
  5. STEP 5. Check the symptom. 

    Q: Does a hunting occur? 

    1. YES:  Replace the ECM (Refer to ECM < 2.4L ENGINE >, ECM < 3.0L ENGINE >). Then go to Step 6.
    2. NO:  It can be assumed that this malfunction is intermittent (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
  6. STEP 6. Check the symptom. 

    Q: Does a hunting occur? 

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