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Home >> Mitsubishi >> 2004 >> Galant ES >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Auto-Cruise Control System >> Auto-Cruise Control System Diagnosis >> Symptom Procedures >> INSPECTION PROCEDURE 4: Auto-cruise Control cannot be Set. >> Diagnosis

INSPECTION PROCEDURE 4: Auto-cruise Control cannot be Set.: Diagnosis

Required Special Tool: 

  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 (MUT-III). ).
    2. Turn the ignition switch to the "ON" position.
    3. Check for auto-cruise control system diagnostic trouble code.
    4. Turn the ignition switch to the "LOCK" (OFF) position.
    5. Disconnect scan tool MB991958.

    Q: Is DTC set? 

    1. YES:  Refer to DIAGNOSTIC TROUBLE CODE CHART . Then go to  Step 6.
    2. NO:  Go to Step 2.
      Fig 1: Connecting Scan Tool Mb991958 To Data Link Connector
      G00944276Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
  2. STEP 2. Using scan tool MB991958, check data list item 04: 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 (MUT-III). ).
      Fig 2: Connecting Scan Tool MB991958 To Data Link Connector
      G00944277Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Turn the ignition switch to the "ON" position.
    3. Set scan tool MB991958 to data reading mode.
      • Auto-cruise control system item 04, 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 SYMPTOM PROCEDURES NUMBER 3 . Then go to  Step 6.
  3. STEP 3. Using scan tool MB991958, check data list item 05: Stoplight Switch and data list item 06: 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 (MUT-III). ).
      Fig 3: Connecting Scan Tool MB991958 To Data Link Connector
      G00944278Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Turn the ignition switch to the "ON" position.
    3. Set scan tool MB991958 to data reading mode.
      • Auto-cruise control system item 05, Stoplight 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. Set scan tool MB991958 to data reading mode.
      • Auto-cruise control system item 06, 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".
    5. Turn the ignition switch to the "LOCK" (OFF) position.
    6. Disconnect scan tool MB991958.

    Q: Is the switch operating properly? 

    1. YES:  Go to Step 4.
    2. NO:  Refer to INSPECTION PROCEDURE 1: WHEN THE BRAKE PEDAL IS DEPRESSED, AUTO-CRUISE CONTROL IS NOT CANCELLED.  Then go to  Step 6.
  4. STEP 4. Using scan tool MB991958, check data list item 07: Transmission Range 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 (MUT-III). ).
      Fig 4: Connecting Scan Tool MB991958 To Data Link Connector
      G00944279Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Turn the ignition switch to the "ON" position.
    3. Set scan tool MB991958 to data reading mode.
      • Auto-cruise control system item 07, Transmission Range Switch.
        • When selector lever is at the "P" or "N" position, the display on scan tool MB991958 should be "ON".
        • When selector lever is at the "R" or "D" 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: WHEN THE SELECTOR LEVER IS MOVED TO "N" RANGE, AUTO-CRUISE CONTROL IS NOT CANCELLED.  Then go to  Step 6.
  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 MALFUNCTIONS ).
    2. NO:  Replace the PCM [Refer to POWERTRAIN CONTROL MODULE (PCM) - 2.4l or POWERTRAIN CONTROL MODULE (PCM) - 3.8L ]. 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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