Because now it doesn’t.

Was “fiddling” with the 12-way adjustment and it suddenly stopped. At the same time I got a “passenger door open” warning and a yellow airbag lamp on the dash. Goddammit.

I've checked the fuses, the underseat ground and the drivers seat module PCB doesn’t look damaged.

I’ve got SDD and a Mongoose cable but not used it enough in anger to be confident in what I should be doing with it - any obvious checks or “programs” I can run to help diagnose this?

TIA

 

SDD is the best as I don't think after market stuff will read the Power Seats.
Need to post car info or we can't help?
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My bad - 2006 XJR, RHD

 

ICarSoft LR V2 will read all modules and show real time data.

Pete M

 

Even seat modules? I could splash out on an ICarSoft CR and use it across my “fleet”…

 

Pete have you read the seat modules with that scanner?
I ask because it's common for the advertising to state it reads all modules.
BUT that is a big maybe so you need to check each scanner and each module.
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Hi clubairth1
I am pretty sure I have seen the module DSM (Driver Seat Module) while scrolling through the list. I will check again and note the relevant PIDs. I think I have an error in my fore/aft position data as the seat doesn't always get the memorized position correct.
There are 170 data PIDs for the PCM alone.

Pete M

 

Sounds a bit like a connector or connectors under the seat may have worked loose. Have a look and see.... you never know....

 

Hi clubairth1,
I have checked my car with my iCarsoft LR V2.0. The DSM (Driver Seat Module) is shown in the list of modules. I can scan for errors, clear errors and see live data. There are 24 data PIDs which cover the seat positions fore/aft, front and rear raise/lower, recline, headrest, squab extension etc There are also PIDs for the control switch actuations and battery voltage. Unfortunately only one value can be graphed/viewed/manipulated at one time. The front seat fore/aft position seems to start at 9% (full forward) to 19% (full aft).
The iCarSoft graphs are not very useful, as the scale adjusts dynamically to accommodate the signal.
For loss of seat memory (which I have), it seems there is a recalibration routine in WDS/SDD, but nowhere else.
Reading the seat memory TSB, they say that the code B1940 is to be ignored.

Pete M

 

For the benefit of others, whilst the ground under the seat looked (and even tested) good, when I undid the nut to clean it all up the stud broke apart and turned to dust!
Sourced a suitable self tapping screw, cleaned and remade the connection - much success!

Gif