Description of On-Board Diagnostics (SWS)

DIAGNOSTIC FUNCTION ON-BOARD DIAGNOSTICS




If an error occurs in the ECU or the SWS or CAN communication line which performs the SWS or CAN communication, the DTC is memorized in ETACS-ECU. The DTCs have 11 items. The DTCs are checked to connect scan tool MB991958 (MUT-III sub assembly). The memorized DTCs are not erased even if the ignition switch is turned to the LOCK (OFF) position. The DTCs are erased to operate scan tool MB991958 (MUT-III sub assembly).

NOTE:(*1): For vehicles that do not have a sunroof, the diagnosis code is always sent but it does not indicate a problem.
NOTE:(*2): The diagnosis code for the current problem is not sent.
NOTE:(*3): For vehicles that do not have a multi center display (middle grade type), the diagnosis code is always sent but it does not indicate a problem.