A21 Seat/steering column memory control module

Connector overview

Number	X-pin, color	Description
X650	12-pin, black	Connector Seat/steering column memory control module
X653	4-pin, natural	Connector Seat/steering column memory control module
X1465	15-pin, black	Connector Seat/steering column memory control module
X18840	3-pin, black	Connector Seat/steering column memory control module

Pin	Type	Description / Signal type	Connection / Measuring notes
1	E	Switch signal Steering column length adjust motor	Steering column length adjust motor

2	A	Voltage control Driver's seatback recliner motor	Driver's seatback recliner motor

3	A	Voltage control Driver's seat height motor	Driver's seat height motor

4	A	Voltage control Driver's seat cushion tilt motor	Driver's seat cushion tilt motor

5	A	Voltage control Driver's seat movement motor	Driver's seat movement motor

6		Not used

7	A	Switch signal Steering column angle adjust motor	Steering column angle adjust motor

8	E	Negative activation Driver's seatback recliner motor	Driver's seatback recliner motor

9	E	Negative activation Driver's seat height motor	Driver's seat height motor

10	E	Negative activation Driver's seat cushion tilt motor	Driver's seat cushion tilt motor

11	E	Negative activation Driver's seat movement motor	Driver's seat movement motor

12		Not used

Pin	Type	Description / Signal type	Connection / Measuring notes
1	E	Switch signal Steering column length adjust motor	Steering column position switch

2	E	Switch signal Steering column length adjust motor	Steering column position switch

3	E	Switch signal Steering column length adjust motor	Steering column position switch

4	E	Switch signal Steering column length adjust motor	Steering column position switch

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Seat cushion tilt up signal Driver's seat	Driver's seat cushion tilt motor

2	A	Seat cushion tilt down signal Driver's seat	Driver's seat cushion tilt motor

3	A	Seat position back signal Driver's seat	Driver's seat movement motor

4	A	Seat position front signal Driver's seat	Driver's seat movement motor

5	A	Signal, raise seat height Driver's seat	Driver's seat height motor

6	A	Ground	Ground point

7	A	Signal, seat backrest forward Driver's seat	Driver's seatback recliner motor

8	E	Pin assignments at connector 3	Fuse F26

9	E/A	I-bus splice	General module

10	A	Signal, lower seat height Driver's seat	Driver's seat height motor

11		Connector

12		Connector

13		Connector

14	A	Signal, seat backrest back Driver's seat	Driver's seatback recliner motor

15		Connector

Pin	Type	Description / Signal type	Connection / Measuring notes
1	M	Ground	Driver's seat lumbar support switch

2		Not used

3	A	Terminal 30 voltage supply	Driver's seat lumbar support switch