Inspection Procedure 1: Communication with the M.U.T.-III is not Possible.




caution If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Diagnose the CAN bus lines before the diagnosis codes (Refer to GROUP 54C, CAN bus-line diagnostic flow ).

TECHNICAL DESCRIPTION (COMMENT)



PROBABLE CAUSES



  • Damaged wiring harness or connector
  • Malfunction of the A/T-ECU

DIAGNOSIS

STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.
(1)Connect M.U.T.-III to the 16-pin diagnosis connector.
(2)Turn the ignition switch to the ON position.
(3)Diagnose the CAN bus line.

Q. Is the check result normal?
Check and repair the A/T system.
Repair the CAN bus lines (Refer to GROUP 54C, CAN bus line Diagnostic flow ).