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SATELLITE RADIO TUNER TSB Revision CHASSIS ELECTRICAL 54A-657 HOW TO DIAGNOSE THE CAN BUS LINES Required Special Tools: • MB991958: Scan Tool (M.U.T.-III Sub Assembly) • MB991824: Vehicles Communication Interface (V.C.I.) • MB991827: M.U.T.-III USB Cable • MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system) 1. Connect scan tool MB991958 to the data link connector. matches the vehicle being diagnosed. • If they match, go to Step 8. • If not, go to Step 5. 5. Select the "view vehicle information" button. that it matches the vehicle being diagnosed. • If they match, go to Step 8. • If not, go to Step 5. 8. Select the "OK" button. the one which the vehicle is fitted with, and then select the CHECK OF FREEZE FRAME DATA The freeze frame data can be checked by using scan . When detecting fault and storing the diagnostic trou- Display item list Item No. Item name Content Unit 1 Odometer Total driving distance after the diagnostic trouble mile 2 Ignition cycle Number of times the ignition switch is turned "ON" or Number of 4 Accumulated minute Cumulative time for current malfunction of diagnostic trouble code min |