DIAGNOSIS FUNCTION


The diagnosis function retrieves diagnosis code and service data by M.U.T.-III and enables the performance of the actuator test.

  • DIAGNOSIS CODE
  • Service data sent
  • Actuator test
  • Diagnosis deletion using M.U.T.-III
  • Freeze frame data
  • Status indication by diagnosis code
  • ECU information display
note If a diagnosis code is set, the "status indication by diagnosis code" informs users whether a mechanical problem currently exists (current trouble) or whether it existed before but normal operation has been restored (past trouble).

HOW TO READ DIAGNOSIS CODE
caution Before connecting or disconnecting the M.U.T.-III, turn the ignition switch to the "LOCK" (OFF) position.


Connect the M.U.T.-III to the 16-pin diagnosis connector, and read the diagnosis code.
note For details on how to use the M.U.T.-III, refer to the "M.U.T.-III operation manual."
1.Ensure that the ignition switch is at the "LOCK" (OFF) position.
2.Start up the personal computer.
3.Connect special tool M.U.T.-III USB cable MB991827 to V.C.I. (MB991824) and the personal computer.
4.Connect special tool M.U.T.-III main harness A (MB991910) to the V.C.I.
5.Connect the M.U.T.-III main harness A to the diagnosis connector of the vehicle.
6.Turn the V.C.I. power switch to the "ON" position.
note When the V.C.I. is energized, the V.C.I. indicator lamp will be illuminated in a green colour.
7.Start the M.U.T.-III system on the personal computer and turn the ignition switch to the "ON" position.
8.Read the diagnosis code.
note When storing the diagnosis code as reference information, the freeze frame data obtains the data when the diagnosis code is confirmed, and then stores the ECU status of that time. By analysing each data using M.U.T.-III, troubleshooting can be carried out efficiently.
9.Disconnecting the M.U.T.-III is the reverse of the connecting sequence, making sure that the ignition switch is at the "LOCK" (OFF) position.

ERASING DIAGNOSIS CODE
caution Before connecting or disconnecting the M.U.T.-III, turn the ignition switch to the "LOCK" (OFF) position.
Connect the M.U.T.-III to the diagnosis connector, and erase the diagnosis code. The procedure is the same as "How to Read Diagnosis Code ."