That’s what I suspected . I guess that in the factory it was fixed to the inside of the frame and then the bike built around it. I’m hoping above hope your comment above(post #16) holds true and once one or both of the front accelerometers are replaced the system corrects itself. Sadly though, the pragmatic side of me says that won’t be the case . As someone has been at the exhaust servo in the past I suspect the fault may lie inside the unit.
Thanks. For anyone else reading this now or in the future, this is what the unit looks like. The hexagonal cam is where the exhaust valve cable attaches to, the servo motor is underneath it. The rear suspension rotary sensor is the unit underneath that with the plastic arms attached.
The last few months I've been having a few issues coming and going intermittently. Neutral switch , dss lights and then my fuel gauge went. I thought I'd try the resistor trick but when that didn't work I thought ohoh! Using the obdstar found multiple alarms ,so started googling and came up with this thread , thanks Paul. Stripped bike down and started unplugging sensors and when I unplugged the accelerometer one on the fork leg the fuel gauge started working. I was watching this as I guessed they were all linked through the canbus? Most alarms cleared ordering new sensor tomorrow I'm glad the gauge had stopped working as this was my circuit tester ...
Just reread the thread and as Nelly said mine also went into preload calibration. That rotary rear sensor kept coming up as an issue before the accelerometer was unplugged too. Bugger getting at front connections as fuel tank off job.
To finish off this thread (since it popped back up in my feed), the issue with the bike in question was a fault/short circuit within the rear suspension unit. Unfortunately these are not serviceable items so it requires the replacement of the entire rear suspension. There was also a fault (short circuit) within the front accelerometer fitted at the headstock too. The fact there was a fault in the main suspension control unit (ie the big silver cylinder under the seat and to the rear of the battery) was causing the voltage across the canbus network, which connects all the DSS components and the fuel sensor, to drop significantly enough for the BBS to be tricked into thinking all units had a short or open circuit hence the multitudinous error messages when in fact it was just 2 items that were at fault. How was this detected ? By back probing and measuring the voltage across the canbus circuit for these items at each item’s connector whilst systemically disconnecting one item at a time. BTW, the exhaust valve disconnect was a red herring. If you have a similar issue in the future just ignore the ESE. Finally, I’m glad the rear rotary sensor wasn’t at fault as that’s extremely difficult and time consuming to get out, swapping out the rear suspension unit in its entirety is simple by comparison, no more than 45 -60 mins (once the corrosion between the suspension mounting bolt and frame has been overcome).
Hi Paul, I have the same problem, all the same codes except the left handlebar switch, I bougth a new servo and the swing arm sensor but nothing change, so I understand that may be the real problem is the same that yours, the rear shock right? So if you can give more information about how you discover the fail I really appreciate too much Greetings, Adan
Are those the only error codes you have? You say you bought a new exhaust servo motor and swing arm position rotary sensor housing, I presume you mean the unit shown in the photo in post #22 above? Did you actually fit the new unit? Thats a fairly extensive job to dismantle the bike to get the old one out and the new one in. in my cases (I’ve had 2 bikes now like this) identifying where exactly the fault lay was a repetitive process of elimination. There are 4 components in the DSS circuit that feed voltages back to the BBS. They are: A) the 2 front accelerometers (one on the front axle, LHS, and the other on the headstock) which connect into the wiring loom under the LHS of the fuel tank. B) The rotary arm sensor attached to the swing arm on the RHS (which is part of the exhaust servo housing), and, C) the sensor within the rear shock motor housing (the big silver tube under the seat) which monitors and adjusts the preload on the rear shock. Each of those sensors has a 5V supply to it from the BBS. They also have a variable voltage going back to the BBS (see the wiring diagram in a previous post above). The voltage sent back to the BBS is varied due to a variable resistance within the sensor. The resistance varies due to positional movements of the internals of the sensor as the bike goes over the road surface. I went through a repetitive process of disconnecting one sensor at a time and then measuring the voltages at the other sensors to check they were 5v. The voltages were measured at the point each sensor connects into the loom and were measured by back-probing the wiring at the connector. When the faulty unit is disconnected the voltage across the rest of the circuit remained at 5V, however, with the faulty unit connected into the circuit the voltage across the circuit was significantly less, iirc, less than 0.5V. Consequently one can work out exactly where the fault lies. I’ll check later which colour wire is for what at each sensor. Edit: OK, having checked. As you look at the wiring diagram above, the wires coloured black is the earth/ground wire. The wires coloured green on the diagram are the power feed to each component. The wires coloured blue are the signal feed (5V) and those coloured purple are the signal returns. Note the colouring of the wires on the diagram are not the colours of the actual wires, the actual colours are indicated on the diagram eg Bk-Bl is black & blue.
