Tipover Logic

Nibbio Posts : 519 Join date : 2017-11-09

This may help someone else
Waiting for the ferry I dropped the bike at zero speed, only damage to my pride.
After picking it up again I was unable to get it to crank, all the lights were in line but not so-much as a click from the start relay and yes it's Startus Interuptus proof
I wondered if it might be the tip-over sensor, didn't have a clue where to find it.
The lights looked normal so I decided to hot-wire the solenoid, it started right up when I touched the solenoid wire to the battery terminal.
Turned the key Off then back on and it started normally, has ever since.

So what happened, did I reset something in the ECU or did the vibration reset the sensor?

Does anyone know where the tip-over sensor is located?

Mark, do you have access to the logic in the ECU or a document describing the inter-reaction between discrete inputs and outputs?
I work with Programmable Logic Controllers, it would be nice to know what's going on in here.

GRiSO Capo Posts : 10198 Join date : 2013-09-30

The tip over sensor is located ~~under the seat near the relays~~ behind the headstock.

As for the logic, that's Marelli Secret Squirrell business. If I recall correctly, there's a time delay after it's tripped, before restart is possible. I will check.

Edit: I made a boo-boo.

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Don Abbondio Posts : 6086 Join date : 2014-03-13 Age : 69

Yep Mark, I believe your are correct and it could spread from a few minutes to 20 or so, but I have been known to be wrong before. Roy, the whole idea is to wait and make sure everything is OK before proceeding. Whether you got around it with your method, or it had reset itself, I guess we will never know - unless you do it again, but I would not recommend that...

GRiSO Capo Posts : 10198 Join date : 2013-09-30

According to documentation, it disables to fuel pump and "start up" circuit via the injection relay.

Thusly:

This sensor in the right position with the engine running is in open contact. Should the vehicle fall the sensor will close the ground contact through pin 35 of connector B. The ECU, sensing this condition of danger, will stop the engine.
If the sensor is repositioned correctly, the consent to start-up is achieved turning the key to OFF and waiting 10 seconds during which the ECU carries out the power latch.

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Nibbio Posts : 519 Join date : 2017-11-09

I found a training document on Guzzitech that says there is a 10 second delay and the key must be turned off for it to reset

Nibbio Posts : 519 Join date : 2017-11-09

I found this document, it says the sensor has to be open and key has to be off for 10 seconds for it to rreset
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Page 103, calls it The Fall Sensor

GRiSO Capo Posts : 10198 Join date : 2013-09-30

Yep. That's what I quoted above.

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GRiSO Capo Posts : 904 Join date : 2015-05-16 Age : 72

Lesson learned ....
Always learning something new ..
Thanks, this could save some angst down the track.
Stay safe all

GRiSO Capo Posts : 1657 Join date : 2014-09-22

When mine fell over (there is a video on this site showing it!) It took longer than 10 seconds, more like 30 before it burst into life again.

» Tipover/tilt/fall sensor