Memory seats button's not working anymore

[Whitecat]

I have read thread regarding this problem and the fixed solution was to replace the entire actuator plate +/- $400. .. this seems to me the last option... but just woundering if some of you was able to fix this issue without going to that stage ? Curious if this can be related to dead fuse or bad connexion or anything else ?

Thanks guys

Marc

[TerminatorX5]

tell us what is happening, when it started and how it started...

[Whitecat]

Originally Posted by TerminatorX5

tell us what is happening, when it started and how it started...

Hello term, well the red button still light on when i press on it but it seems that i lost all my memories from the 1 and 2 button. I have tried repetitively to re-program but it just not recording anything. My steering adjustment still working thought
I.e. Steering going up when i turn off the key and down when i turn on ...everything start with my right mirror which automaticly adjust low view when i put in reverse but went a bit random crazy lately.... I like the feature since my wife and i have very different driving position.....i'm thinking of my batterie that it might be due to be replace.....

[TerminatorX5]

the WDS differentiates between comfort seats and other seats.. the comfort ones have the moving headrests, so, couple extra wires...

i would start from simple to more complex... the last resort is to replace the module but before that, i would check the wiring, to see if there are any broken, chaffed, or otherwise compromised wires... the seat is a moving object, with wires under the seat that can be pinched, cut off and what not...

the WDS shows 4 plugs under the seat, 3-, 4-, 12-, and 15-pin connectors... check them out, see what is up with them... if the need be, don't be afraid to remove the seat and flip it upside down, there are only 2 nuts and 2 bolts holding the seat, the front bolts have plastic covers...

Oh, there will be a plug under the seat that has YELLOW cover, and some other YELLOW markings - that is airbag related plug, when the plug is disconnected do NOT turn the ignition on, otherwise you will get the airbag light on the cluster...

so, check for wiring damage first...

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

Plug connector overview

Number X-pin, colour Description
X650 12-pin, black Plug connector Seat/steering column memory (SM/LSM) control unit
X653 4-pin, natural Plug connector Seat/steering column memory (SM/LSM) control unit
X1465 15-pin, black Plug connector Seat/steering column memory (SM/LSM) control unit
X18840 3-pin, black Plug connector Seat/steering column memory (SM/LSM) control unit
Pin assignments at plug connector X650

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

2 A Positive activation Driver's backrest recliner motor Driver's backrest recliner motor

3 A Positive activation Driver's seat height adjustment motor Driver's seat height adjustment motor

4 A Positive activation Driver's seat cushion tilt motor Driver's seat cushion tilt motor

5 A Positive activation Driver's seat movement motor Driver's seat movement motor

6 Not used

7 A Switch signal Steering column inclination motor Steering column inclination motor

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

9 E Negative activation Driver's seat height adjustment motor Driver's seat height adjustment 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 assignments at plug connector X653

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

2 E Switch signal Steering column adjustment motor Steering column adjustment switch

3 E Switch signal Steering column adjustment motor Steering column adjustment switch

4 E Switch signal Steering column adjustment motor Steering column adjustment switch

Pin assignments at plug connector X1465

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

2 A Downward inclination signal Driver's seat Driver's seat cushion tilt motor

3 A Slide back signal Driver's seat Driver's seat movement motor

4 A Slide forward signal Driver's seat Driver's seat movement motor

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

6 A Ground Ground point

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

8 E Pin assignments at plug connector 3 Fuse F26

9 E/A I-bus connector General module

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

11 Plug connector

12 Plug connector

13 Plug connector

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

15 Plug connector

Pin assignments at plug connector X18840

Pin Type Description / Signal type Connection / Measuring notes
1 M Ground Lumbar support switch, driver's seat

2 Not used

3 A Voltage supply terminal 30 Lumbar support switch, driver's seat

[Whitecat]

Originally Posted by TerminatorX5

the WDS differentiates between comfort seats and other seats.. the comfort ones have the moving headrests, so, couple extra wires...

i would start from simple to more complex... the last resort is to replace the module but before that, i would check the wiring, to see if there are any broken, chaffed, or otherwise compromised wires... the seat is a moving object, with wires under the seat that can be pinched, cut off and what not...

the WDS shows 4 plugs under the seat, 3-, 4-, 12-, and 15-pin connectors... check them out, see what is up with them... if the need be, don't be afraid to remove the seat and flip it upside down, there are only 2 nuts and 2 bolts holding the seat, the front bolts have plastic covers...

Oh, there will be a plug under the seat that has YELLOW cover, and some other YELLOW markings - that is airbag related plug, when the plug is disconnected do NOT turn the ignition on, otherwise you will get the airbag light on the cluster...

so, check for wiring damage first...

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

Plug connector overview

Number X-pin, colour Description
X650 12-pin, black Plug connector Seat/steering column memory (SM/LSM) control unit
X653 4-pin, natural Plug connector Seat/steering column memory (SM/LSM) control unit
X1465 15-pin, black Plug connector Seat/steering column memory (SM/LSM) control unit
X18840 3-pin, black Plug connector Seat/steering column memory (SM/LSM) control unit
Pin assignments at plug connector X650

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

2 A Positive activation Driver's backrest recliner motor Driver's backrest recliner motor

3 A Positive activation Driver's seat height adjustment motor Driver's seat height adjustment motor

4 A Positive activation Driver's seat cushion tilt motor Driver's seat cushion tilt motor

5 A Positive activation Driver's seat movement motor Driver's seat movement motor

6 Not used

7 A Switch signal Steering column inclination motor Steering column inclination motor

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

9 E Negative activation Driver's seat height adjustment motor Driver's seat height adjustment 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 assignments at plug connector X653

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

2 E Switch signal Steering column adjustment motor Steering column adjustment switch

3 E Switch signal Steering column adjustment motor Steering column adjustment switch

4 E Switch signal Steering column adjustment motor Steering column adjustment switch

Pin assignments at plug connector X1465

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

2 A Downward inclination signal Driver's seat Driver's seat cushion tilt motor

3 A Slide back signal Driver's seat Driver's seat movement motor

4 A Slide forward signal Driver's seat Driver's seat movement motor

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

6 A Ground Ground point

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

8 E Pin assignments at plug connector 3 Fuse F26

9 E/A I-bus connector General module

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

11 Plug connector

12 Plug connector

13 Plug connector

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

15 Plug connector

Pin assignments at plug connector X18840

Pin Type Description / Signal type Connection / Measuring notes
1 M Ground Lumbar support switch, driver's seat

2 Not used

3 A Voltage supply terminal 30 Lumbar support switch, driver's seat

Holy cow, Term let me study all those infos !!! Thanks ! wish you live across the street i have sport seats....electronic and me are not best friend...last time i've replaced the LCD screen for my nav ...took me a full day :-).... Thanks again..