A21 Seat/steering column memory (SM/LSM) control unit

Plug connector overview

NumberX-pin, colourDescription
X65012-pin, blackPlug connector Seat/steering column memory (SM/LSM) control unit
X6534-pin, naturalPlug connector Seat/steering column memory (SM/LSM) control unit
X146515-pin, blackPlug connector Seat/steering column memory (SM/LSM) control unit
X188403-pin, blackPlug connector Seat/steering column memory (SM/LSM) control unit

Pin assignments at plug connector X650

PinTypeDescription / Signal typeConnection /
Measuring notes
1ESwitch signal Steering column adjustment motorSteering column adjustment motor
   
2APositive activation Driver's backrest recliner motorDriver's backrest recliner motor
   
3APositive activation Driver's seat height adjustment motorDriver's seat height adjustment motor
   
4APositive activation Driver's seat cushion tilt motorDriver's seat cushion tilt motor
   
5APositive activation Driver's seat movement motorDriver's seat movement motor
   
6 Not used 
   
7ASwitch signal Steering column inclination motorSteering column inclination motor
   
8ENegative activation Driver's backrest recliner motorDriver's backrest recliner motor
   
9ENegative activation Driver's seat height adjustment motorDriver's seat height adjustment motor
   
10ENegative activation Driver's seat cushion tilt motorDriver's seat cushion tilt motor
   
11ENegative activation Driver's seat movement motorDriver's seat movement motor
   
12 Not used 
   

Pin assignments at plug connector X653

PinTypeDescription / Signal typeConnection /
Measuring notes
1ESwitch signal Steering column adjustment motorSteering column adjustment switch
   
2ESwitch signal Steering column adjustment motorSteering column adjustment switch
   
3ESwitch signal Steering column adjustment motorSteering column adjustment switch
   
4ESwitch signal Steering column adjustment motorSteering column adjustment switch
   

Pin assignments at plug connector X1465

PinTypeDescription / Signal typeConnection /
Measuring notes
1AUpward inclination signal Driver's seatDriver's seat cushion tilt motor
   
2ADownward inclination signal Driver's seatDriver's seat cushion tilt motor
   
3ASlide back signal Driver's seatDriver's seat movement motor
   
4ASlide forward signal Driver's seatDriver's seat movement motor
   
5ASignal, raise seat height Driver's seatDriver's seat height adjustment motor
   
6AGroundGround point
   
7ASignal, seat backrest forward Driver's seatDriver's backrest recliner motor
   
8EPin assignments at plug connector 3Fuse F26
   
9E/AI-bus connectorGeneral module
   
10ASignal, lower seat height Driver's seatDriver's seat height adjustment motor
   
11 Plug connector 
   
12 Plug connector 
   
13 Plug connector 
   
14ASignal, seat backrest back Driver's seatDriver's backrest recliner motor
   
15 Plug connector 
   

Pin assignments at plug connector X18840

PinTypeDescription / Signal typeConnection /
Measuring notes
1MGroundLumbar support switch, driver's seat
   
2 Not used 
   
3AVoltage supply terminal 30Lumbar support switch, driver's seat