B1087-54 (2F) LIN bus A - System programming failure - missing calibration

Did you manage to fix this code? I just had my air con serviced and this close is apparently holding out the A/C system from working. Going by the manual 5 motors are the Lin bus input to the ATC module.

Means one or more stepper motor's gone.

Can you post the complete output? SOLD | Tuned MY 2011.5 Range Rover Autobiography 4.4 TDV8 Orkney Grey | e-diff | ACC

New Toy: Unimog U1550L/37
New : G350D

Not sure what you mean by the complete output? I have the gap iid tool if that can be used to diagnose which ones are faulty.

yes you will need an output from the IID tool. SOLD | Tuned MY 2011.5 Range Rover Autobiography 4.4 TDV8 Orkney Grey | e-diff | ACC

New Toy: Unimog U1550L/37
New : G350D

ffrr14 wrote:

It is dropping right







The second battery is recent, but the noise pre dates it.

I will have to do some old fashioned probing the long weekend.

R1 is glove compartment and corresponding in the rear is during sleep, any ideas?

Thank you

Are you thinking that the heat would be from the contacts or from the coil if the contacts are stuck closed? There's no feed-back from the contacts to the coil otherwise the coil would always be energised without any way to release the contacts.

Have you got an interior light coming on due to badly a adjusted micro switch? Had that one, took me ages to realise the system did not shut down, kept cycling. It was in the glovebox which had dropped out of the track one side.

Dear friens,

I have same problem with hvac like as below. Does this mean that i have to change all damper motors which shown on error list?

I solved some of problems with removing HVAC. plug off all sockets and then plug in. There was probably loose contact. And after this process, problems has been solved.

If somebody encounters that kind of wide problem, they can focus on HVAC and it’s sockets first.

Well done on the fix...  Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

I have AC that is very inconsistent in its delivery and have the below fault code:

B1087-54 (2F) LIN bus A - System programming failure - missing calibration.

I have this issue, is it a case of something needing to be recalibrate or replaced. My thinking is the interior ambient temperature sensor. Or as suggested above is it a case of me just needing to unplug the HVAC connectors and check their connections?

Many thanks for any advice. Current
2011 4.4TDV8 VSE
1972 MGBGT
Gone
2004 Discovery Landmark 2.5D
2003 Freelander TD4 SE