$12P Can't connect to 808 ECM.

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L67PSI
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cars: L67 VT Calais

$12P Can't connect to 808 ECM.

Post by L67PSI »

Hi all

I've got NVRAM chip and usb comms on 808 ECM. Have loaded the $12P bin onto DS1245Y chip. However trying to start the vehicle (VP V6) the fans come on. The code did verify after programming & had offset of 8000.

I cannot connect to ECM via Flashtool or from TunerPro OSE plugin. Here is a screen shot from TunerPro.

Maybe I have a few settings wrong??? Any help is appreciated.

Thanks
Attachments
connection_error.jpg
connection_error.jpg (91.42 KiB) Viewed 8057 times
L67PSI
Posts: 177
Joined: Mon Dec 12, 2016 11:27 am
cars: L67 VT Calais

Re: $12P Can't connect to 808 ECM.

Post by L67PSI »

Re-reading guide says if $12P code is wrong then fans and CEL could be on.

I'll reprogram ds1245y and try again.
Dylan
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Re: $12P Can't connect to 808 ECM.

Post by Dylan »

I don't burn them with any offset. Just use the stacked bin in the zip download.
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antus
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Re: $12P Can't connect to 808 ECM.

Post by antus »

As above. Not sure if your hardware is genuine. Could also be faulty.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
L67PSI
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cars: L67 VT Calais

Re: $12P Can't connect to 808 ECM.

Post by L67PSI »

Dylan wrote:I don't burn them with any offset. Just use the stacked bin in the zip download.

Ok, I'll try the stacked bin and see what happens.
L67PSI
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Re: $12P Can't connect to 808 ECM.

Post by L67PSI »

antus wrote:As above. Not sure if your hardware is genuine. Could also be faulty.

Yes, genuine NVRAM and ds1245y chip. Bought from VL400 few years ago.

Anything that I can test on NVRAM for faults??
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antus
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Re: $12P Can't connect to 808 ECM.

Post by antus »

Should work then. As Dylan suggested burn the appropriate stacked bin. Also check comms board wiring, strange that it dies when you start, could be an electrical short somewhere. Is the write wire installed? Try removing the RW pin after an initial flash to rule out problems with the write wire.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
L67PSI
Posts: 177
Joined: Mon Dec 12, 2016 11:27 am
cars: L67 VT Calais

Re: $12P Can't connect to 808 ECM.

Post by L67PSI »

Tried stacked bin, still didn't work. Fan comes on and engine runs really rough. No connection to ECM either.
L67PSI
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Re: $12P Can't connect to 808 ECM.

Post by L67PSI »

Here is pic of NVRAM. Chip was out to get reprogrammed.
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nvram1.JPG
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antus
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Re: $12P Can't connect to 808 ECM.

Post by antus »

Can you post up pics of the nvram chip? I'd like to check its date code.
Have you read the FAQ? For lots of information and links to significant threads see here: http://pcmhacking.net/forums/viewtopic.php?f=7&t=1396
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