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DIAGNOSIS FUNCTION


HOW TO CONNECT THE SCAN TOOL (M.U.T.-III)
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)

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.Ensure that the ignition switch is at the "LOCK" (OFF) position.
2.Start up the personal computer.
3.Connect special tool MB991827 to special tool MB991824 and the personal computer.
4.Connect special tool MB991910 to special tool MB991824.
5.Connect special tool MB991910 to the data link connector.
6.Turn the power switch of special tool MB991824 to the "ON" position.
note When special tool MB991824 is energized, special tool MB991824 indicator light will be illuminated in a green color.
7.Start the M.U.T.-III system on the personal computer.
note Disconnecting scan tool MB991958 is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF) position.

HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES
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)
note If the battery voltage is low, diagnostic trouble codes will not be set. Check the battery if scan tool MB991958 does not display.
1.Connect scan tool MB991958 to the data link connector.
2.Turn the ignition switch to the "ON" position.
3.Select "System select" from the start-up screen.
4.Select "From 2006 MY" of "Model Year." When the "Vehicle Information" is displayed, check the contents.
5.Select "Meter" from "System List," and press the "OK" button.
note When the "Loading Option Setup" list is displayed, check the applicable item.
6.Select "Diagnostic Trouble Code."
7.If a DTC is set, it is shown.
8.Choose "Erase DTCs" to erase the DTC.

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.
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 being diagnosed.

  • If they match, go to step 8.
  • If not, go to step 5.
5.Select the "view vehicle information" button.
6.Enter the vehicle information and select the "OK" button.
7.When the vehicle information is displayed, confirm again 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.
9.When the optional equipment screen is displayed, choose the one which the vehicle is fitted with, and then select the "OK" button.

CHECK OF FREEZE FRAME DATA


The freeze frame data can be checked by using M.U.T.-III.
When detecting fault and storing the diagnosis code, the ECU connected to CAN bus line obtains the data before the determination of the diagnosis code and the data when the diagnosis code is determined, and then stores the ECU status of that time. By analyzing each data from M.U.T.-III, the troubleshooting can be performed more efficiently. The displayed items are as the table below.

Display item list
Item No.
 Item name
 Content
 Unit
1
 Odometer
 Total driving distance after the diagnosis code is generated
 mile
2
 Ignition cycle
 Number of times the ignition switch is turned "ON" or "LOCK (OFF)" after the past failure transition
 Number of counts is displayed.
4
 Accumulated minute
 Cumulative time for current malfunction of diagnosis code
 min