DIAGNOSIS FUNCTION



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."
  • If the ignition switch is turned to the "ON" position with M.U.T.-III connected to the vehicle, headlamp automatic levelling warning is displayed on the multi-information display in the combination meter. This symptom occurs because the headlamp automatic levelling-ECU enters the diagnosis mode when the M.U.T.-III is connected to the diagnosis connector, and it does not indicate malfunction. Therefore, ignore the indicator display and carry out diagnosis using M.U.T.-III. (When the M.U.T.-III starts communication with the ECU, the indicator display disappears.)
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.
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 ."