How To Diagnose The Can Bus Line

Required Special Tools: 

• MB991958: Scan Tool (MUT-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827: MUT-III USB Cable
  • MB991910: MUT-III Main Harness A

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "CAN bus diagnosis" from the start-up screen.
4. When the vehicle information is displayed, confirm that it matches the vehicle whose CAN bus lines will be diagnosed.
   • If they match, go to step  8.
   • If not, go to step 5.
5. Select "view vehicle information" button.
6. When the vehicle information is displayed, confirm again that it matches the vehicle which is being diagnosed.
   • If they match, go to  8.
   • If not, go to  5.
7. Press the "OK" button.
8. When the options are displayed, choose the options (mark the check) and then select "OK".
   Fig 1: Diagnosing CAN Bus Line Using Scan Tool MB991958

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.