Rear wash and wipe not working

[hidnmine]

Hi,

Son in law has a problem with his 2009 A3. Both the rear wash and wipe have stopped working.
The wash pump doesn't operate, but windscreen wash works fine.

VCDS is showing a "CAN gateway" fault - 00470 - "Combination comfort Databus in Single Wire". Could this be related?

Thanks,
Andy

[hidnmine]

Embarrassingly obvious!
The rear door open sensor!
Wiper and washer don't work when the door is open...

Andy