What's a normal current drain on GSA battery?

[Spanner]

My Mk3 GSA has a current drain of about 25mA on the battery measured after ignition has been off for an hour. I'm using a NN autoswitch which drains about 15mA, but the 25mA is with the autoswitch disconnected. The bike doesn't have an alarm, ESA or ABS, just the immobiliser.
Does anyone know is this a normal rate of drain on the battery for an 'ignition off' CANBUS bike (i.e. my 13Ah battery dead in 21 days) or have I got a gremlin lurking?

Spanner

 

[swissrob]

u have a gremlin.... i had something similar and it was a relay for aftermarket lights, once cured the bike drained about 25ma untill the canbus shut down.

 

[Spanner]

Very interesting.......

hi Rob,
Cheers for the response. Did you mean to write 25mA once cured?
That's what mine is draining now (with autoswitch disconnected) so maybe that is the norm?
BMW reckon it shouldn't be more than 5mA but with component tolerances it could well vary significantly bike to bike. I don't want to spend hours chasing down a suspected gremlin if in fact 25mA is normal.
Spanner

 

[Deleted account 190920001]

I think he means its 25mA with the Canbus still powered up where yours is 25mA after the Canbus has shut down.

 

[swissrob]

once i found the fault and changed the realy during normal acc switch position it was 25ma, with ign off it remained at 25ma for approx 30 seconds , canbus shut down and then the current draw couldnt be measured.

 

[wessie]

once i found the fault and changed the realy during normal acc switch position it was 25ma, with ign off it remained at 25ma for approx 30 seconds , canbus shut down and then the current draw couldnt be measured.

This might give a clue to the diagnosis: perhaps the canbus is not shutting down? There should be some way to check for this fairly easily I would imagine e.g. does the accessory power socket remain live, possibly?

If this is the case then the problem might mean a change of expensive hardware or might just need a software refresh with the correct diagnostic tool.