Hi Pete,
The whining noise is from your throttle body and normal and nothing to worry about.
As far as your electrical issues go, checking for fault codes is where you start the diagnosis and not where you necessarily finish.
For your battery to be dead after 3 days you have a parasitic draw somewhere. You can use a Amp meter on one of your battery cables and it should be reading in the milliamp range with the car off and after about 10 min (when the interior lights go out). I'd expect to see about 200mA if everything is normal. If it's higher than that you can start pulling fuses (and replacing them) one by one until the amp readings drop to normal. When the amp readings drop to normal that is the circuit where the issue is. And i'd bet that is the circuit where you are getting your BUS fault from.
CAN BUS faults usually come from a dodgy module or the CAN BUS wiring, either a short to earth or an open circuit. To track down CAN BUS faults you really need an oscilloscope to check the signals as you spend hours methodically go through the system. Without an oscilloscope you really are just guessing. Our 07 FL2 has 24 modules on the CAN BUS but yours being a MY13 probably has a few more. Maybe time for an Auto electrician to have a look at your car.
Best of luck I hope you get this sorted. Having a flat battery all the time is just a PITA.
*(Just for some info and looking at the wiring diagram and your rear door issue, the rear doors are not on the CAN BUS but are controlled by the front door modules which are. The rear RH door is controlled front RH door module and rear LH controlled by the front LH module).
04 L322 Vogue V8 - Work truck
07 Freelander 2 TD4 SE - The wifes
74 Leyland P76 Targa Florio - Aspen Green
91 Kawasaki GPZ900R
Previous LRs = 78IIa series - 81, 93, 95 RRC - D2V8
Bookmarks