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 ECU problem?

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Makestain
Squinternotto
Squinternotto
Makestain

Posts : 3
Join date : 2014-07-30

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PostSubject: ECU problem?   ECU problem? Icon_minitime1Sat Jun 22, 2019 8:03 am

GRiSO 1200 (2010) did not run well. Got ecu error 62. As a consequence I opened several connections and also checked stepper motor hoses and connections to ecu. I have AFR clock and said around 11-12 before tried to find reason for the error. Now after checking several things AFR says around 17-20 - very lean. Today I connected Guzzi Diag, before starting engine looked good, after starting engine e.g. voltage reading was 5888.00V, rmin 58880 etc. Does not look good, ECU dead or something else?
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Pete Roper
GRiSO Capo
GRiSO Capo
Pete Roper

Posts : 6450
Join date : 2013-05-29
Age : 62

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PostSubject: Re: ECU problem?   ECU problem? Icon_minitime1Sat Jun 22, 2019 9:53 am

Has it been rollerised?
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beetle
GRiSO Capo
GRiSO Capo
beetle

Posts : 6737
Join date : 2013-09-30

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PostSubject: Re: ECU problem?   ECU problem? Icon_minitime1Sat Jun 22, 2019 3:56 pm


If you can start the engine, the ECU is not dead. First thing to do is go back and reseat every connector you opened. Then, check the pins on the ECU, as well as making sure the ground connection on the ECU is clean and tight. Also check/clean the ground on the starter.


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Makestain
Squinternotto
Squinternotto
Makestain

Posts : 3
Join date : 2014-07-30

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PostSubject: Re: ECU problem?   ECU problem? Icon_minitime1Sat Jun 22, 2019 11:26 pm

It has not been rollerised, however some parts changed related to valves before 18000 km - I bought this when 18000 km on clock.
What I did not tell (to make long story short), after checking and opening several connections plus stepper + ecu connections/pins I started the engine, error code (62 = stepper motor gnd) disappeared, warmed motor up, rode 3 km. Everything looked great until I turned back to front yard - AFR moved from around 14 to 20. I turned off the engine immediately. On the following day (yesterday) connected GuzziDiag showing crazy readings, almost all starting 5888...

Starter motor was removed and cleaned a year ago including connections.
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Pete Roper
GRiSO Capo
GRiSO Capo
Pete Roper

Posts : 6450
Join date : 2013-05-29
Age : 62

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PostSubject: Re: ECU problem?   ECU problem? Icon_minitime1Sat Jun 22, 2019 11:54 pm

Well there's little point in fixing anything until it's rollerised but stepper has been flagged and I'd wonder about the O2 sensor as well.
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Makestain
Squinternotto
Squinternotto
Makestain

Posts : 3
Join date : 2014-07-30

ECU problem? Empty
PostSubject: Re: ECU problem?   ECU problem? Icon_minitime1Sun Jun 23, 2019 11:51 pm

Ok, thank you. O2 sensor has been removed and set "lambda off" with guzzidizag.
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