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ECU disconnected error

Ghost_Bullet

Ghost_Bullet

Cruisin' Guzzisti
Joined
Jan 1, 2009
Messages
241
Location
South Island New Zealand
I was on a returning trip home, after close to 1000km. I passed a car, and suddenly the service light flashed on the dash, and large service letters came on, then off, the ecu notice on the dash came on to say it was not connected, the speedo and tach would jump in unison from normal condition speed etc, to zero.

The weird thing was that the engine/bikes physical operation did not alter at all. After some time everything mentioned above returned to normal condition. When getting home, I checked the dash ecu errors, nothing noted. The ecu was connected firmly. Prior to this journy, I had sprayed all the plugs/connections with a electrical silicon spray, which I have done a number of times previous.

The bike starts and runs fine. More concern is intimitant faults that cause not resolved, and when/what could happen next time.... I have no desire to be on a ride, then have to trailer the thing home... Ha ha.

The bikes now done over 103,000km. And still overall awesome.

Ideas?
 
And the grounding lug behind the starter motor too.

Isn't your ride a Griso? I believe the earler ones were prone to water egress at the ECU connector. I think there was a "waterproof" connector cover made for the Stelvio which may help. Others hoprfully may chime in with more accurate information on this.
 
there is also a wire loop ( orange) , under the cover at the back of the seat , held by x2 bolts . check this
 
I had a 12000 mile service, road to Guzzi dealers in rain all fine, following the service the bike wouldn't idle, mechanic changed all sorts with no change, eventually griso fired up and ran ok. Managed to get home but a few splutters on way home. Decided to check wiring and Ecu plugs, the brown connector on Ecu had muck in it so I cleaned it and put the Ecu back in frame. Started up bike and display said Ecu disconnected, took Ecu off frame and turned on bike, no Ecu error and all looked ok but bike will not start.

Is there any code required to start bike following Ecu removal ? Might there be a problem with cable to Ecu.
 
Last edited:
No code is needed after ECU removal. Could be most anything. Do you have any active error codes?
 
john zibell said:
No code is needed after ECU removal. Could be most anything. Do you have any active error codes?
Click to expand...
problem solved, i found a seal missing around the edu connector, there was water in the connector. cleaned the connector and placed rubber o seal to create a water tight seal.
 
The Griso appears to be fine except for an oil leek now.

Ive just replaced the crank/flange gasket and sump gasket, took the bike out for two short rides and no oil leeks. Went out at weekend for a ride, hot day, when i got back oil appeared again? it looks like it's coming from above the flange, when the bike is on the side stand oil moves to the left side rear. Any ideas?
 
john zibell said:
Pictures of both sides of the engine would help on the oil leak issue.
Click to expand...
Ok thanks I'll take some photos and upload
I am wondering if the leak is coming from other side of clutch drum (transmission cage) I also replaced the inspection plug on transmission cage . There is a gasket no. 874257 between crank case and flange?
 

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When the bike is on the side stand oil will collect at flange/ crank case, rear (side stand side of bike)
 
Check the hoses at the air box. There is one line meant to drain oil collected in the air box. The end of that line should be down below the frame on the right side with a rubber plug in it. If it is missing, or very low it may have disconnected and the oil is running down the block..
 
Has any one ever considered moving the ECU from the front of the Griso to a better place?How many Griso owners get water in the ECU?

Would there be potential under the petrol tank or would it be too hot?
 
Thanks for advice, I was looking at one today and only £6 gbp so it's worth a try. The Ecu connectors are on top on the Griso so it might work.
 
I've learned to only ride my Griso when it's dry to avoid electrical problems but then I live in California where we don't get much rain. The roads tend to be very slippery in the rain due to the 40+ million people. Finally being old, ridden hard and put away wet (myself) I'll take my car, jeep or pickup and keep my G11 for better days.
 
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