Need advice for 2013 Norge Red Triangle Light and ECU unplugged

[fanattic]

2013 Norge (14k miles) had been sitting in the garage for a couple of months. Before doing anything else, I connected a battery tender, and it took several hours before giving a solid green light.
I then tried to start it. Warning lights and gauge sweep all seemed normal, I could hear the fuel pump run for a second, and it sounded normal, but then the red triangle light illuminated, and the ECU unplugged icon came up. Of course it wouldn't crank.
Nothing has been done to it since the last time I rode it in late spring. 
At that time I had discovered a mouse nest in the air cleaner box. Had to remove the tank of course to get to it, but I didn't see any damage to any wiring. After cleaning out the mess, I did a check ride and everything seemed fine. (I also installed a metal screen on the air box intake nozzle to keep any more rodents out).
Since then, the bike has been sitting and nothing else done to it except for re-charging the battery a couple of days ago.
I've checked the fuzes under the seat and they look fine. Battery connections look good, clean and tight. Bike is clean, and has rarely even gotten wet.
I'm getting ready to remove the tank again, ugh what a pain, to look for any wiring issues, but would appreciate any advice on what to look for, expect, or even how to verify if the ECU has gone bad or not. And why would that have happened after just sitting?
There are no dealers anywhere near where I live (Maryland) except for a scooter shop in VA who by their own admission don't really know Guzzis.
Thanks for any help or suggestions.

[CoolBreezeBreva]

Checked to see that the main connector to the ECU is connected and/or not loose?

[fanattic]

Checked to see that the main connector to the ECU is connected and/or not loose?

I haven't removed the tank yet. I will be checking that along with all the other wiring that I can see once I get the danged thing off.

[CoolBreezeBreva]

If the quick connector on your fuel line is anything like mine on my on 07 Norge it is easy to break it so be careful. It helps to push the fuel line inward toward the connector with one hand and then at the same time pull it away from the connector with your other hand all the while wiggling the line off the connector. A lot of people toss the stock quick connector for another connector that is easier to deal with.

[Vagrant]

Go load test the battery first.

[fanattic]

Thanks, but as I suspected, it's not the battery. I swapped it with a known good one and it made no difference.
I also removed the tank and did not see any wiring that looked damaged, nor any loose connectors. Is the ECU the thing stuck under the frame rails behind the steering head?! Ya know, I love riding this bike and I love looking at it, but Damn, it's no fun at all to work on. If that's the ECU, the wire bundle connecting to it appears to be tight and undisturbed, as best as I can see. I haven't tried to remove it yet.
So this looks like it might be the ECU at fault? Is there a way to confirm that beyond swapping it out?
Thanks again!

[CoolBreezeBreva]

Do you have any dash codes? If so, what are they?

[GuzziNZ]

Start again before swapping out the ECU.
Did you checked the fuses visually or with a meter?
The ECU fuse is the 3A seconded from the left and according to the hand book is permanent feed even with key out.
Like already suggested go through your ecu and dash fault codes.

[fanattic]

I checked the fuzes with a meter (both ohms and volts) and they all look good.
I just entered the diagnostic menu, and found that nothing was listed in the ECU menu, but the Dashboard menu had several.
This is with the tank off and the wire harness from the tank disconnected.

[CoolBreezeBreva]

Odd I looked in the Moto Guzzi Service manual and it doesn't even really list what the 05 Code is which your dash is currently showing active. Anybody else had an 05 error code on a second gen Norge and deciphered what it means? On my first gen 2007 Norge the 05 error is related to a fuel sensor failure which from what I understand can be a consequence of unplugging the main connector for the fuel gauge/efi when you take the gas tank completely off. NE 1 else got a different theory? I would plug that fuel gauge/efi connector back up and see if that 05 code goes away and if it don't you may have found a culprit. Have you tried cycling the key 2-3 times to see if it makes the red triangle light go off?

[GuzziNZ]

I would think with the fuel pump disconnected you would have an error code up.
Did you check you had 12V continuous across the 3A fuse holder?

[fanattic]

Yes I have 12v across the 3A fuze, and I tried cycling the key several times which didn't make any difference.

[moto]

2013 Norge (14k miles) had been sitting in the garage for a couple of months....

It sounds like it could be corrosion. One common problem that leads to this is a poor connection in the ground wire on the ECU. You should check that and clean it. If you haven't.

If you search for "ECU unplugged" in the search box you'll find at least several discussions. But since Pete Roper named the ECU ground as likely I'd try that.

[Bulldog9]

Odd I looked in the Moto Guzzi Service manual and it doesn't even really list what the 05 Code is which your dash is currently showing active. Anybody else had an 05 error code on a second gen Norge and deciphered what it means? On my first gen 2007 Norge the 05 error is related to a fuel sensor failure which from what I understand can be a consequence of unplugging the main connector for the fuel gauge/efi when you take the gas tank completely off. NE 1 else got a different theory? I would plug that fuel gauge/efi connector back up and see if that 05 code goes away and if it don't you may have found a culprit. Have you tried cycling the key 2-3 times to see if it makes the red triangle light go off?

Dash 05 is the fuel level sensor I believe. Pulled these out of my files. As others have said Guzzi Diag lets you get deeper.

DASHBOARD ERRORS
DSB 01 Immobiliser fault: key code read but not recognised or key code not read
DSB 02 Key not present or transponder broken
DSB 03 Immobiliser fault: Antenna broken (open or short-circuit)
DSB 04 Immobiliser fault: internal controller fault
DSB 05 Fuel sensor fault
DSB 06 Air temperature sensor fault
DSB 07 Oil sensor fault DSB
DSB 08 Oil pressure fault

ECU ENGINE CONTROL UNIT ERRORS (Computer) The dashboard receives from the central computer only actual faults.  Vcc = + 5Volts. Gnd = Ground or Frame C.C. = Component Connector (this is my guess)

ECU Error Code 10 Error throttle valve C.C. Vcc
ECU Error Code 11 throttle valve C.C. Gnd
ECU Error Code 14 Engine temperature C.C. Vcc
ECU Error Code 15 Engine temperature C.C Gnd
ECU Error Code 16 Air temperature C.C. Vcc
ECU Error Code 17 Air temperature C.C Gnd
ECU Error Code 20 Low battery
ECU Error Code 21 Lambda sensor (O2 Sensor in exhaust)
ECU Error Code 22 Ignition coil 1 C.C. Vcc
ECU Error Code 23 Ignition coil 1 C.C. Gnd
ECU Error Code 24 Ignition coil 2 C.C. Vcc
ECU Error Code 25 Ignition coil 2 C.C. Gnd
ECU Error Code 26 Injector 1 C.C. Vcc
ECU Error Code 27 Injector 1 C.C. Gnd
ECU Error Code 30 Injector 2 C.C. Vcc
ECU Error Code 31 Injector 2 C.C. Gnd
ECU Error Code 36 Pump relay
ECU Error Code 37 Local Loop-back
ECU Error Code 44 Relay starter C.C. Vcc
ECU Error Code 45 Relay starter C.C. Gnd
ECU Error Code 46 Cannister C.C Vcc
ECU Error Code 47 Cannister C.C. Gnd
ECU Error Code 50 Battery high
ECU Error Code 51 ECU general
ECU Error Code 54 Instrument panel
ECU Error Code 55 Auto adaptation
ECU Error Code 56 Vehicle speed
ECU Error Code 60 Stepper C.A.
ECU Error Code 61 Stepper C.C. Vcc
ECU Error Code 62 Stepper C.C. Gnd
ECU Error Code 00 Unknown
The dashboard maintains memory of old errors.

Guzzi Diag Code Faults
P0105 Air pressure sensor - short circuit to positive / open circuit, short circuit to
P0106 Air pressure sensor - short circuit to positive / open circuit, short circuit to neg-
P0107 Air pressure sensor - signal not valid.
P0108 Air pressure sensor - signal not valid.
P0110 Air temperature sensor - open circuit, shorted to positive / shorted to negative.
P0115 Engine temperature sensor - open circuit, shorted to positive / shorted to negative.
P0116 Engine temperature sensor - signal not valid.
P0129 Throttle position sensor - illogical signal.
P0130 Lambda probe - shorted to positive / circuit, shorted to negative.
P0134 Lambda probe - voltage without variation.
P0135 Lambda probe heating - shorted to positive / open circuit, shorted to negative.
P0136 Check the air-fuel ratio / Lambda probe
P0140 Lambda probe heater - voltage without variation.
P0141 Lambda probe heater - shorted to positive / shorted to negative / open circuit.
P0150 Lambda probe - shorted to positive / circuit, shorted to negative.
P0155 Lambda probe heating - shorted to positive / open circuit, shorted to negative.
P0160 Throttle Limp Home self-acquisition P0160 - test failed.
P0161 Throttle mechanical springs self-acquisition - test failed.
P0162 Throttle minimum mechanical position self-acquisition P0162 - test failed.
P0164 Throttle supply voltage during self-acquisition
P0165 Throttle first self-learning NOT performed - test not carried out.
P0166 Throttle control circuit
P0167 Throttle position error - misalignment between control and activation.
P0170 Starter command - shorted to positive
P0180 Throttle Limp Home self-acquisition P0180 - test failed.
P0181 Throttle mechanical spring self-acquisition - test failed.
P0182 Throttle minimum mechanical position self-acquisition - test failed.
P0184 Throttle supply voltage during self-acquisition
P0185 Throttle first self-acquisition NOT performed - test not carried out.
P0186 Throttle control circuit
P0187 Throttle position error - misalignment between control and activation.
P0201 Front injector - shorted to positive / shorted to negative / open circuit.
P0202 Left injector - shorted to positive / shorted to negative / open circuit.
P0204 Injector error
P0210 Error for unexpected intake air in the cylinder manifold - signal not valid.
P0211 Error for unexpected intake air in the cylinder manifold - signal not valid.
P0215 Manifold pressure - pressure too high/pressure
P0216 Manifold pressure - pressure too high/pressure too
P0217 Manifold error - signal not valid.
P0218 Manifold error - signal not valid.
P0230 Fuel pump relay - shorted to positive / shorted to negative / open circuit.
P0336 Engine speed sensor - Synchronism lost
P0351 H.V. Coil - shorted to positive / open circuit or shorted to negative.
P0352 H.V. Coil - shorted to positive / open circuit or shorted to negative
P0410 - Secondary Air System malfunction
P0500 - Sensor/vehicle speed signal
P0501 - Speedo Sensor over maximum limit/ signal not valid.
P0502 - Engine Control Unit (ECU) has detected a different reading of speed between the vehicle speed sensor and the wheel speed sensor.
P0512 - Starter request circuit failed
P0560 - System Voltage Malfunction
P0601 - EPROM Error- circuit not operational.
P0605 - Control Module Fault
P0608 - Control Module VSS Output A Malfunction
P0609 - Control Module VSS Output B Malfunction
P0610 Reset lines error- circuit not operational
P0611 - Fuel Injector Control Module Performance -- **This lives continuously on the Guzzi MIU ECU - unless reset by dealer PADS**
P0650 - Indicator lamp not functioning
P0653 - ECU has detected a high voltage condition from the coil or related.
P1607 - Data file saved (for safety) **Can only be reset by dealers PADS**
P1800 - Variable Air (SAS)
P2158 - Faulty wheel speed or ABS sensor

U0122 - Immobilizer/Key alarm related - corrected on one by replacement of the left side bar switchgear.

Engine oil sensor faults
The dashboard will reveal oil pressure faults as well as sensor faults. The oil sensor fault is detected with engine stopped and key in on position, if the sensor is not conducting (open circuit).