Guzzi Electric Mystery

[Rebochi]

     My 1200S/Griso bike has developed a electrical problem. Stater doesn't engage when the button is pushed and I get a pair of error codes, ECU error and Dash error. No obvious damage to the wiring harness, horn, signals , brake lights work, dash powers up and seems to go through the functions. My SWAG is wiring harness, any ideas?

[RinkRat II]

     There is no magic answer. Start at the battery, check voltage. Move to the fuses and relays and check the connections there, move to the wiring harness and check for loose or corroded terminals. Kill switch and handlebar connections........ ...

     Paul B

[guzzisteve]

Do a search for StarterInteruptus

[moto]

     My 1200S/Griso bike has developed a electrical problem. Stater doesn't engage when the button is pushed and I get a pair of error codes, ECU error and Dash error. No obvious damage to the wiring harness, horn, signals , brake lights work, dash powers up and seems to go through the functions. My SWAG is wiring harness, any ideas?

Since the dash communicates to the ECU (over a Canbus connection), and since I remember some problems having to do with poor seating of the ECU connector, I'd look there first, carefully. The ECU also controls what happens when the starter button is pushed. The ECU is the common factor in your symptoms, but actual ECU failures are rare. Oh wait. You didn't say which ECU and dash errors you got. THAT could help.

[fotoguzzi]

Try a different battery or some jumper cables. The ECU needs to see perfect voltage.

https://wildguzzi.com/forum/index.php?topic=117948.0

[MotoGuzzi750]

     My 1200S/Griso bike has developed a electrical problem. Stater doesn't engage when the button is pushed and I get a pair of error codes, ECU error and Dash error. No obvious damage to the wiring harness, horn, signals , brake lights work, dash powers up and seems to go through the functions. My SWAG is wiring harness, any ideas?

How old is the battery ? Is it on battery tender when not in use ?
In my ( limited ) experience, fresh battery / properly charged battery solved a lot of pain/problems, so would highly recommend checking on battery age/recharge/replace first.

[Rebochi]

Do a search for StarterInteruptus

   Defiantly not startus interuptus, Had that with the stock motor and wiring harness.  With startus interuptus the resistance through the safety switches and harness limits the current to less than is needed to pull in the starter solenoid, there is no voltage to the starter solenoid and the ignition . Plus this has a Griso wiring harness, not a candidate for startus interuptus.

[Rebochi]

How old is the battery ? Is it on battery tender when not in use ?
In my ( limited ) experience, fresh battery / properly charged battery solved a lot of pain/problems, so would highly recommend checking on battery age/recharge/replace first.

The battery is new and is on a battery tender. The voltage reading on the dash ranges from 12.00 V to 12.8 Volts just sitting there, seems to indicate a crappy connection

[chuck peterson]

Needs a steady 12.6 volts or more without the key on. What’s it do with key on?

Something not right if your reading is fluctuating at the dash

Keep a voltmeter attached at the battery whilst (!?) cranking the motor. If the voltage drops off a cliff to below 8-9-10 it’s likely battery death

Clean both ends of the ground cable…load test the battery at an auto parts…connect a known good battery..

I had an AGM go to 500 millivolts overnight after 10 years of service, with no signs beforehand

[Rebochi]

   Update on the Electrical problem. The wiring harness was replaced a now the bike starts and runs with the dash disconnected. With the dash hooked up it demands that I enter the code. The Griso service code is 12425 and the default user code is 00000, none of which works. Still getting incorrect code message. Any ideas on finding out how to extract the user code? My other Frankenstein CARC bike which was put together by the same shop  has a user code of other than 00000.

[guzzisteve]

You can send it to the Netherlands and they have software to fix it to all 0's Place called Carmo or some such name.
You could buy a new dash.
Do a search this has been discussed extensively.

[Rebochi]

   Update on the everchanging problem. I had Carmo in Holland recover the User code, the bike is back together and running. It now requires that the user code be entered every start up. I attempted to initialize the keys and made it as far as inserting the first key. Now it is stuck on insert the first key. after disconnecting the battery it returns to the same screen. The resistance through the antennae is 14.7 ohms, battery voltage is 12.7 VDC any thoughts on this?

[Vagrant]

FWIW, there was a massive write up on Guzzi tech about this a while back.

[moto]

... I attempted to initialize the keys and made it as far as inserting the first key. Now it is stuck on insert the first key....

Does it react at all to the key being inserted? Did you try the other key?

[Rebochi]

  It does not react, screen says Insert first Key

[moto]

  It does not react, screen says Insert first Key

I wonder if the antenna that detects and reads a code from the key has become disconnected. It forms a sort of semicircle around the lock, I recall, and you can look for it and try to plug it back in or improve its seating in the plug.

The fact that you get no reaction at all is a good clue, even if my offhand guess about the antenna is wrong. It might require more thinking than I can muster right now to figure the puzzle out.

[Rebochi]

Found the problem, I had swapped connector 12 with 14.  Works now

[guzzisteve]

Congrats Good Find. Retrace what you did.

[Muzz]

As soon as I saw "Guzzi Electric Mystery" I thought, what's new, here goes. It didn't disappoint.

Pleased you got it sorted.