CJ125 error code on homemade shield

Support forum for the Lambda Shield designed to connect Bosch LSU 4.9 wideband oxygen sensors to Arduino projects.
cristian2020
Posts: 8
Joined: 05 Jun 2020 00:28

Re: CJ125 error code on homemade shield

Post by cristian2020 » 18 Jun 2020 01:33

Hi Christian!, Very thanks You!!

with code correct:

1,0,10495,363,832,701,12392
1,0,10495,419,832,714,12461
1,0,10495,500,831,709,12536
1,0,10495,611,639,707,12453
1,0,10495,750,458,705,12409
2,0,10495,850,337,701,12385
2,0,10495,851,328,705,12381
2,0,10495,853,321,706,12377
2,0,10495,854,313,706,12370
2,0,10495,855,306,706,12364
2,0,10495,856,298,706,12357
2,0,10495,858,291,707,12353
2,0,10495,858,285,707,12347
2,0,10495,860,278,707,12342
2,0,10495,862,272,707,12338


now I can calculate Ip with Ip = 1000 (UA-1.5) /61.9*17 where: Ua = (ADC / 1023) right?}


Regrads,

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Christian_Bylund
Posts: 126
Joined: 07 Mar 2015 18:09

Re: CJ125 error code on homemade shield

Post by Christian_Bylund » 18 Jun 2020 15:58

cristian2020 wrote:
18 Jun 2020 01:33
Hi Christian!, Very thanks You!!

with code correct:

now I can calculate Ip with Ip = 1000 (UA-1.5) /61.9*17 where: Ua = (ADC / 1023) right?}

Regrads,
That looks about right, except you UA need to be (ADC / 1023) * 5V.

See 4.1 in the Technical Manual.

Good luck!
Best Regards,
Christian Bylund
Bylund Automotive AB

cristian2020
Posts: 8
Joined: 05 Jun 2020 00:28

Re: CJ125 error code on homemade shield

Post by cristian2020 » 18 Jun 2020 20:14

ok Perfect! Very thank you again!


Best Regards!

marvelousmatthew6969
Posts: 2
Joined: 21 Jul 2020 16:12

Re: CJ125 error code on homemade shield

Post by marvelousmatthew6969 » 21 Jul 2020 16:20

hi christian iam wondering to know in the lambda sheild 2.0 what kinda mosfet are in use are its still the STD30nf06lt4 or difrent kinda mosfet thanks
best regards matthew

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Christian_Bylund
Posts: 126
Joined: 07 Mar 2015 18:09

Re: CJ125 error code on homemade shield

Post by Christian_Bylund » 21 Jul 2020 18:37

marvelousmatthew6969 wrote:
21 Jul 2020 16:20
hi christian iam wondering to know in the lambda sheild 2.0 what kinda mosfet are in use are its still the STD30nf06lt4 or difrent kinda mosfet thanks
best regards matthew
Hi Matthew,

Lambda Shield 2 uses the same MOSFET as the original Lambda Shield.
Best Regards,
Christian Bylund
Bylund Automotive AB

marvelousmatthew6969
Posts: 2
Joined: 21 Jul 2020 16:12

Re: CJ125 error code on homemade shield

Post by marvelousmatthew6969 » 22 Jul 2020 08:48

great thanks alot

cristian2020
Posts: 8
Joined: 05 Jun 2020 00:28

Re: CJ125 error code on homemade shield

Post by cristian2020 » 22 Oct 2020 03:30

Hi Christian, I hope you are fine.
I wasn't working on this project, but now I'm back. I remember the last time it worked good. But now the UR value doesn't change even when blowing directly on the sensor.

2,0,10495,1023,226,1023,12769
2,0,10495,1023,225,1023,12768
2,0,10495,1023,225,1023,12768
2,0,10495,1023,226,1023,12769
2,0,10495,1023,224,1023,12767
2,0,10495,1023,226,1023,12769

I am using lamda shield GUI code.

Any idea what is happening?

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Christian_Bylund
Posts: 126
Joined: 07 Mar 2015 18:09

Re: CJ125 error code on homemade shield

Post by Christian_Bylund » 23 Oct 2020 16:19

Hi Cristian,

2,0,10495,1023,226,1023,12769

Besides UA being way too high and UR being too low I see another issue and that is the UB values. This indicates that you are powering your shield which a much too high voltage as you are reaching the limit of the ADC for the voltage divider used. This is one of the upgrades we did for Lambda Shield 2.

Check your supply voltage or ADC reference voltage.
Best Regards,
Christian Bylund
Bylund Automotive AB

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