Tasks of system diagnosis control module - GF54.21-P-4119-01R

Tasks of system diagnosis control module (N55) 

• Permanent fault monitoring and localization, also during driving
• Status polls all control modules on the interior CAN  and checks whether they are currently active on the CAN data bus 
• Logging the transmitted fault codes  and process variables  from the control modules (interior CAN) in the form of fault scenarios 
• Analysis, processing and control module-encompassing restriction of suspicious components
• For fault output  the Diagnosis Assistant System (DAS)  must be connected to the diagnostic connector (X11/4)  via the K-wire. The following information is output by the system diagnosis control module (N55) : 
• System diagnosis result/fault code and fault text
• Suspicious components
• Affected vehicle functions
• Inspection instructions

Additional task 

• ATA alarm sources 

  The system diagnosis stores fault scenarios  for the antitheft alarm system (ATA)  . These fault scenarios provide information on the cause of an alarm that has been triggered