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Home >> Mitsubishi >> 2012 >> Galant ES >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Symptom Procedures >> INSPECTION PROCEDURE 4: Auto-cruise Control System cannot be Set. >> Diagnosis
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INSPECTION PROCEDURE 4: Auto-cruise Control System cannot be Set.: Diagnosis

Required Special Tools: 

  1. STEP 1. Using scan tool MB991958, read the diagnostic trouble code. 
    CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
    1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ).
    2. Turn the ignition switch to the "ON" position.
    3. Check for auto-cruise control system diagnostic trouble code. (Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ).
    4. Turn the ignition switch to the "LOCK" (OFF) position.
    5. Disconnect scan tool MB991958.

      Q: Is DTC set? 

      1. YES:  Diagnose the auto-cruise control system. (Refer to DIAGNOSTIC TROUBLE CODE CHART ). Then go to Step  6.
      2. NO:  Go to Step 2.
        Fig 1: Identifying Scan Tool MB991958 Connection With Data Link Connector
        G06716344Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. STEP 2. Using scan tool MB991958, check data list item 75: Cancel Switch. 
    CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
    1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ).
    2. Turn the ignition switch to the "ON" position.
    3. Set scan tool MB991958 to data reading mode for auto-cruise control system. (Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ).
      • 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? 

      1. YES:  Go to Step 3.
      2. NO:  Refer to INSPECTION PROCEDURE 3 . Then go to Step  6.
        Fig 2: Identifying Scan Tool MB991958 Connection With Data Link Connector
        G06716344Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  3. STEP 3. Using scan tool MB991958, check data list item 74: Brakelight Switch and data list item 89: Normally Closed Brake Switch. 
    CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
    1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ).
    2. Turn the ignition switch to the "ON" position.
    3. Set scan tool MB991958 to data reading mode for auto-cruise control system. (Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ).
      • Item 74, Brakelight Switch.
        • When brake pedal is depressed, the display on scan tool MB991958 should be "ON".
        • When brake pedal is released, the display on scan tool MB991958 should be "OFF".
      • Item 89, Normally Closed Brake Switch.
        • When brake pedal is depressed, the display on scan tool MB991958 should be "ON".
        • When 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? 

      1. YES:  Go to Step 4.
      2. NO:  Refer to INSPECTION PROCEDURE 1 . Then go to Step  6.
        Fig 3: Identifying Scan Tool MB991958 Connection With Data Link Connector
        G06716344Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  4. STEP 4. Using scan tool MB991958, check data list item 88: Neutral Switch. 
    CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
    1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ).
    2. Turn the ignition switch to the "ON" position.
    3. Set scan tool MB991958 to data reading mode for auto-cruise control system. (Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)  ).
      • item 88, Neutral Switch.
        • When selector lever is at the "N" position, the display on scan tool MB991958 should be "ON".
        • When selector lever is other then "N" 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? 

      1. YES:  Go to Step 5.
      2. NO:  Refer to INSPECTION PROCEDURE 2 . Then go to Step  6.
        Fig 4: Identifying Scan Tool MB991958 Connection With Data Link Connector
        G06716344Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  5. STEP 5. Check the symptoms. 

    Q: Can auto-cruise control be set? 

    1. YES:  It can be assumed that this malfunction is intermittent. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
    2. NO:  Replace the PCM. When the PCM is replaced, register the encrypted code. Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE . Then go to Step 6.
  6. STEP 6. Check the symptoms. 

    Q: Can auto-cruise control be set? 

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