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problem with ECU resistance in burnd

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problem with ECU resistance in burnd

Posted by Ernst Derksen at February 05. 2012
Hello all times my name is Ernst and I am new, and I have a question for my problem right away,
I am looking for the value of resistance 3 + 7 posseum link for a bj from a Imperza who can help me here gtt 96
 
With kind regards Ernst Derksen

 

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Re: problem with ECU resistance in burnd

Posted by Scott at February 07. 2012

Hi Ernst,

I have had a look at your photo you attached to your post. The resistors are part of the power supply circuit, normally they burn out if the power supply is short circuited or the polarity is reversed. We recommend replacing them with these:

http://nz.element14.com/te-connectivity-raychem/rxef090/fuse-ptc-reset-72v-900ma-radial/dp/1175869 

Our servicing team are able to carry out the job if you can-not find anyone local to yourself.

Regards,

Scott.

Re: problem with ECU resistance in burnd

Posted by Ernst Derksen at February 09. 2012
Dear Scott,
I got the message you replied to Ernst and he asked me to reply to it to you.
Why would I need to replace the resistors with polyfuses? That makes no sense as the LM2940TC12 allready has it's internal protections closely matching those suggested by you in the link provided. 
I really would like to have the original values of the resistors. They are on the input pin of the LM2940TC12 and as such I could not find a diagram close enough to understand why those resistors are there in the first place...
Thank you very much.
Gretibgs,
Tomas

Re: problem with ECU resistance in burnd

Posted by Ernst Derksen at February 09. 2012

Previously Ernst Derksen wrote:

Hello all times my name is Ernst and I am new, and I have a question for my problem right away,
I am looking for the value of resistance 33 + 7 2posseum link for a bj from a Imperza who can help me here gtt 96
 
With kind regards Ernst Derksen

 

Re: problem with ECU resistance in burnd

Posted by Scott at February 09. 2012

Hi Tomas and Ernst

These resistors power the whole board, not just the LM2940TC12. The resistors are both 2R2 1 watt. We recommend using the polyswitches, but you are free to do what you like.

Kind regards,

Scott.

Re: problem with ECU resistance in burnd

Posted by Ernst Derksen at February 09. 2012

Hi Scott

Thanks for your advice and info.
 
Kind regards
 
Ernst

Re: problem with ECU resistance in burnd

Posted by Ernst Derksen at February 10. 2012
het probleem is op gelost was een 2r2 1watt weerstanden.
With kind regards
Ernst Derksen

Re: problem with ECU resistance in burnd

Posted by Ernst Derksen at February 10. 2012
Sorry wrong language
the problem is on unloaded are two weerstanded 1 Watt 2r2.
With kind regards
Ernst Derksen

Re: problem with ECU resistance in burnd

Posted by Scott at February 10. 2012

Hi Ernst,

I don't understand what you are saying in your last post sorry.

Scott.

Re: problem with ECU resistance in burnd

Posted by Ernst Derksen at February 11. 2012
Sorry I have a tap should be the problem is error created there was a 1 Watt resistors on unloaded 2r2.
With kind regards
Ernst Derksen
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