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Pin assignment on steering column electronics control unitJ527 > < Removing and installing steering column switch module

A1

Removing and installing steering column electronics control unitJ527
Removing and installing steering column electronics control unit -J527-
Airbag coil connector and return ring with slip ring -J527- and steering angle sender -F138- are integrated in steering column electronics control unit -G85-.
Removing
–  When renewing control unit select „Replacement“ function for appropriate control unit in „Guided Fault Finding“ or „Guided Functions“ → Vehicle diagnostic tester.
  Note
Return ring with slip ring must be removed/installed in centre position (wheels in straight ahead position).
   
–  Move steering wheel down and to rear as far as possible, making use of full range of steering column adjuster.
–  Remove driver's airbag → Rep. gr.69.
–  Remove steering wheel → Rep. gr.48.
–  Remove trim panels for steering column switch module → Rep. gr.68.
–  Pull out connector locking element -4-, press down release mechanism and unplug electrical connector -3-.
  WARNING
Risk of irreparable damage to electronic components due to static discharge.
Before disconnecting the electrical connection, the mechanic must discharge static by briefly touching striker plate for door or similar.
–  Pull out connector locking element -1-, press down and unplug electrical connector -2-.
  A94-11001
–  Apply screwdriver -7- at retaining hook -6-, as shown in illustration, and carefully release electrical connectors -1, 3, 4, 5-.
–  Remove bolts -arrows-.
–  Detach steering column electronics control unit -J527--item 2- from steering column switch module.
Installing
l  Tightening torque → Chapter
Installation is carried out in the reverse order; note the following:
–  Make sure all electrical connectors are properly engaged.
–  Install trim panels for steering column switch module → Rep. gr.68.
–  Install steering wheel → Rep. gr.48.
–  Install driver's airbag → Rep. gr.69.
–  After renewing return ring with slip ring, perform calibration of steering angle sender -G85- in „Guided Fault Finding“ or „Guided Functions“ mode → Vehicle diagnostic tester.
  A94-11003

Pin assignment on steering column electronics control unitJ527 > < Removing and installing steering column switch module