System description: Diagnosis

The following components are monitored by the system:

• Lumbar pressure sensor (regulating switch)
• Potentiometer voltage of both rearview mirrors
• Hall-effect sensor for backrest adjustment
• Hall-effect sensor for fore-and-aft adjustment
• Hall-effect sensor for height adjustment
• Functioning of the control module (EPROM, A/D converter, main relay)
• Switch for memory seat adjustment and switch for seat adjustment

  When the switch for memory seat adjustment or the switch for seat adjustment are actuated, the faulty component is stored in the fault memory. In this case the word present  also appears on the screen, for example:

  "Open circuit present  in Hall-effect sensor for fore-and-aft adjustment "

  If the cause of the fault is eliminated, then the switch for memory seat adjustment or the switch for seat adjustment must be actuated again. If the cause of the fault has really been eliminated, the text in the fault memory changes from present  to not present. 

  NOTE: The fault memory must always be read out and any faults which may have been stored must always be deleted after diagnosis.