cem volvo

This talks about BDM used on card Engine computer
usbbdm
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Re: cem volvo

Post by usbbdm »

Your target XML is not right. Try to use 1.19 and see if the new XML fixes your issue. If not come and chat with me.
SWiTCh
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Re: cem volvo

Post by SWiTCh »

Thanks you! Best regards. New version working
pnj
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Re: cem volvo

Post by pnj »

Hi Friends

Just preparing to start working with older volvo cem module
Seems I need to load scrip xml file to the USBBDM programmer

But where do I find the XML files to use ?

Thanks in advance

Pierre
usbbdm
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Re: cem volvo

Post by usbbdm »

The xml files is under config. Go to menu Help->Go to configure and you will find all the xml files.
Dskeyslocksmith
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Re: cem volvo

Post by Dskeyslocksmith »

So the pin out says to connect a 5v and also 12v to the cem before it can be read? Does this mean you have to separate power supplies hooked up?
usbbdm
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Re: cem volvo

Post by usbbdm »

Can you come to the site and chat with me? 12V is the power supply. 5V can be found from the board of VCC of any chip.
tomanycars
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Re: cem volvo

Post by tomanycars »

usbbdm wrote: Sun Apr 10, 2022 2:26 pm Can you come to the site and chat with me? 12V is the power supply. 5V can be found from the board of VCC of any chip.
hi I'm a new member , i purchased a usbjtag from the store (still waiting for it to arrive) , and also have some volvo CEM modules which carries MC68376 + Flash 28F400 which i want to use the device on. , i did spot that there is a 12v supply and also a 5v supply required. , would that require me to use x2 power supplies ? or find a 5v supply from something else on the board. which seems abit dangerous unintentional bridging etc ? :?
usbbdm
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Re: cem volvo

Post by usbbdm »

Come to the make page and we can have a talk.
tomanycars
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Re: cem volvo

Post by tomanycars »

usbbdm wrote: Mon May 09, 2022 1:09 pm Come to the make page and we can have a talk.
come to the make page? where is that?
usbbdm
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Re: cem volvo

Post by usbbdm »

Sorry main page. Any page on www.usbjtag.com will give you a chat window.
tomanycars
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Re: cem volvo

Post by tomanycars »

usbbdm wrote: Wed May 11, 2022 1:44 pm Sorry main page. Any page on www.usbjtag.com will give you a chat window.
thanks i'll have alook around for the contact , is it a live bubble for chat?
usbbdm
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Re: cem volvo

Post by usbbdm »

Yes.
tomanycars
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Re: cem volvo

Post by tomanycars »

usbbdm wrote: Thu May 12, 2022 11:22 amYes.
missed your message im back now
tomanycars
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Re: cem volvo

Post by tomanycars »

hi

so i am having some difficulty trying to get the NT to read the VOLVOCEM i have here in my workshop. ,I'm using the correct VOLVOCEM XML , i followed the diag that was provided via Haltak. it would appear that the 12v connection & GND for the external power is not correct for this version of CEM , when i powered it the external supply showed a high amp draw and a low voltage. which suggested a short. , the overall picture of the CEM circuitry looks identical.

moving on i managed to find the VDD & VCC else where on the circuit , which allowed me to power it successfully. , i followed the connection scheme but it seems to give me mixed results.

this image below is me attempting too connect with the connection
Image

the above picture , would give me mixed results , in the form of every read was different. , i noticed that the CLK wire is purple but that didn't work the device was silent. , but when i used the red wire the module would burst in to life :?:
i thought maybe it was the length of wires that was coursing the read errors.

the next image is be using the BDM wire directly to the pins , that also gave me the same results.

Image

my next test will be ditch the wiring connection and try and use the pin arrangement on the wiring diag within the software

Image

or am i going in the completely wrong rabbit hole ?
is there a list for the pin connections for the NT?
usbbdm
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Re: cem volvo

Post by usbbdm »

Your wiring is not too clean but I can tell you this.
1. Your wire is a little too long and consider lower the clock if the result is not consistent.
2. You need to use u-link Diagram not USB BDM NT diagram.
DSI Brown.
DSO Orange.
CLK Green.
BEER Purple
FREEZE Gray
RESET Blue.
3. Your u-link NT needs to activated to get it working properly.

I can help you remotely via zoom remote desktop.
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