Join Date: Apr 2002
Location: Fairfax, VA, USA
Re: Doing the Canisterectomy on the K1600
This should be no different than any previous canister-equipped BMW, CANBus or not -- there is a hose from the tank to the canister, a vent to atmosphere, and a hose to the intake manifold via a solenoid. The computer looks to see whether the solenoid is present. On my '09 R12RT, the computer stored a code which identified the missing purge solenoid, but nothing ever showed on the dash.
I haven't thought through the hose locations yet, but the two keys for bypassing the canister are:
(i) blocking off the hose leading to the intake manifold -- to prevent the equivalent of a vacuum leak when the purge solenoid is opened (I'd leave the solenoid connected, so there's no stored codes); and
(ii) making sure there are no low points in the hose to atmosphere which would permit accumulation of water to block the venting of the tank -- you must avoid a blocked line, which would prevent air entering the tank as the fuel is used up (the resulting tank vacuum could cause the tank to collapse and/or cut off fuel flow to the engine when the fuel pump can no longer overcome the vacuum; also, unlike the LT tank which would collapse and restore itself afterwards, it is not clear to me that the K16 tank would collapse without rupturing the tank).