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When using scan tool MB991502

WARNING: This page is about a different car, the 2003 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check the drive belt tension. (Refer to CRANKSHAFT PULLEY .)
  2. Measure the drive belt tension vibration frequency by the following procedures:
      CAUTION: Always turn the ignition switch to "LOCK" (OFF) position before connecting or disconnecting the scan tool MB991502.
      Fig 1: Connecting Special Tool MB991668 To Scan Tool MB991502
      G01867716Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    1. Connect special tool MB991668 to scan tool MB991502.
    2. Connect the scan tool MB991502 to the diagnosis connector.
    3. Turn the ignition switch to ON position, and select "BELT TENSION" on the menu screen.
      Fig 2: Connect Scan Tool MB991502 To Diagnosis Connector
      G01867717Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    4. Hold special tool MB991668 to the middle of the drive belt between the pulleys (at the place indicated by arrow), approximately 10 - 20 mm (0.40 - 0.78 inch) away from the rear surface of the belt so that it is perpendicular to the belt (within an angle of +/- 15 degree).
      Fig 3: Holding Special Tool MB991668 To Middle Of Drive Belt Between Pulleys Approximately 10 - 20 MM
      G01867718Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      CAUTION:
      • The temperature of the surface of the belt should be as close to normal temperature as possible.
      • Do not allow any contaminants such as water or oil to get onto the microphone.
      • If strong gusts of wind blow against the microphone or if there are any loud sources of noise nearby, the values measured by the microphone may not correspond to actual values.
      • If the microphone is touching the belt while the measurement is being made, the values measured by the microphone may not correspond to actual values.
      • Do not take the measurement while the vehicle's engine is running.
    5. Gently tap the middle of the belt between the pulleys (the place indicated by the arrow) with your finger as shown in the illustration, and measure that the vibration frequency of the belt is within the standard value.
      1. Standard value: 110 - 144 Hz 
  3. If not within the standard value, replace the auto-tensioner. (Refer to CRANKSHAFT PULLEY .)
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