[Ovmsdev] UDS write by identifier help

[Shane @ Kilve Engineering]

Hi all,

Can anyone give me some help trying to write data to the TPMS ecu? 

I can read for example FL tyre using 
can can1 tx standard 735 03 22 e0 10 00 00 00 00 (FL id e010 FR e020 etc.)
And get back 07 62 e0 10 80 2d b9 d4 

I have confirmed that the tyre id is "80 2d b9 d4” with a tmps reader wireless at the wheel

I have then done a session control with
can can1 tx standard 735 02 10 03 00 00 00 00 00
And get back 06 50 03 00 32 01 f4 00
So that looks ok ?

So I then try 
can can1 tx standard 735 07 2e e0 10 40 ea 85 ce (the new id)
And get back 03 7f 2e 7f 

So ive tried issuing 
can can1 tx standard 735 02 27 01 00 00 00 00 00

But get no response??


any pointers?
p.s. do I also need to be sending tester present to the ecu? Or does the fact im doing a session control take care of this?


Regards
Shane