Does anyone have any experience with this combination of fault codes in the pictures I’ve attached? I’ve Not had much luck from googling. 2015 multistrada 1200 dvt 22k miles Context is I installed a rapid bike evo system, got it running well, went on a 2k+ mile, a few days in I got an engine management light and some on and off throttle surging. At one point I even had no throttle response as if the twist grip was disconnected but it quickly came back. Got through the tour and home today, plugged into my diagnostics (obd star) and it’s thrown a load of fault codes. I saved and then cleared them, went for a ride and found these have returned. All I’ve done so far is check all accessible plugs are tight and all fuses look fine. Some of the relays did feel quite warm to touch, but I’ve never done this before so might be normal? Anyway I’m hoping there’ll be one culprit that’s responsible for the lot, otherwise my next step will be to remove the rapid bike system and see if that changes things (which I’d rather not as it’ll be all the bodywork off again!) Any suggestions welcome, thanks in advance!
It’s not an answer to your question, more an enquiry, what obd diagnosistic tool do you use, I’d like to purchase a cheap one and the price ranges from £150 - £350.
Not really, it's a start point. Probably giving all sort of canbus errors. Running charge voltage is ok? Maybe @West Cork Paul or @nelly could give you some better pointers
Funny you mention them, I’ve just come across this thread and see yours was a defective rear shock but it could be many things linked to that system. I wonder if a coincidence with the rapid bike install 1k miles earlier? And also would the throttle surging give any clues either way?
All the can bus errors appear to refer to errors connected to the dash. The control units are reporting they have lost comms with it. The dash carries one of the two resistance nodes that are essential for the can bus to operate so it it drops off line, the can bus closes….thats the BUS OFF error reported by the control units Most, but not all the other errors appear to be connected to the dash to. It basically runs the functions of the front of the bike and reports sensor readings and switches to the rest of the system. You could try disconnecting the dash and checking the wiring loom etc before reconnecting. Have a look at the loom around the headstock to for any damage.
@Jordan Nelly has given you some good advice there so I’d start with a close inspection of the wiring loom, particularly the pins that relate to the CanHi and CanLo lines. I think you’re going to have to get busy with a multimeter to test continuity and resistance in a number of places whilst performing a ‘wiggle’ test with the wiring loom, you may have a break in it or the fault may lie in a failing resistor at one of the canbus nodes. That’s in regard to all the memorized errors which relate to the Canbus. The canbus connects all the various control units and a lot of the sensors on the bike to one another, and the fact you had what is effectively a power outage across it may explain the disconnect between what the right hand was asking for and the engine power delivered which you experienced. The IMU error is showing as an active error, albeit a generic one and may or may not be a consequence of the other memorized canbus errors. Although as it’s still showing as active I’m inclined to think it’s a continuous and ongoing issue with the device. The Inertial Measurement Unit is a small black box which measures the pitch & yaw of the bike as it moves around the road and feeds back into other computers on the bike such as the ABS, the BBS and, via the BBS, the ECU. You’ll need to do some tests on the IMU too. If the tests on the loom and the IMU don’t indicate any problems then I’d consider reversing out the Rapid Bike Evo, going back to ‘ground zero’ with the ECU and seeing what, if any difference, that makes. It’s one of those things where you’re going to get very familiar with the wiring diagram, friendly with your multimeter, and could find the problem in 5 mins (once the loom is exposed ie plastics and tank removed) or it could take several hours.
