Corrupted DS1245Y

[VX L67 Getrag]

Hey all,

Wondering if there's any reason's for the ds1245y chips getting corrupted after programming on GQ3 & then slotting in 1 of VL400's amazing nv ram boards & running fine for 2 days & then all of a sudden lost map signal & then obviously couldn't figure out fuel or spark & wouldn't run!

Any ideas?

Cheers VX L67 Getrag

[VL400]

Is it corrupted or just a faulty map? Corruption is pretty rare, plenty of daily drives that have not had a problem a very long time. Have you read the ds contents using the programmer? Lots of random crap or just a couple of bytes?

[VX L67 Getrag]

I hadn't done that test as I wasn't sure it would work.

But here you have it a few random errors!

Let me know what you think! You The Man!!!

[VL400]

Its outside the cal area and very random, so cannot be corrupt ALDL frames doing it as the write routine blocks it. Could be a power hit thats done it, hard to tell. Try reprogramming and see if it does it again. Would be carrying that memcal tune as a backup though!

[ejukated]

i always get corruptions on VT onward pcms usually after a few months. never on VS. when i do a dif its not the the cal area. I'm thinking it must be something different in how a VT pcm works seeing as you cant run VS code on a VT.

The other thing to remeber is that the DS1245Y has a max temp rating of 70degC and 85degC on the -IND variants. I try to use the -IND when i can get them but the non -IND ones are usually cheaper and more readily available...

[VL400]

Yeah the vt chip select for memory mapping is different to the vs pcm. Will look into it more and see if anything can be done better.

[VX L67 Getrag]

Looks like the exact same thing happened, this time I can possibly rule out the ds1245y chip, it was a completely different chip on the same nv ram board & bingo only took 10 mins of driving this time!

I had another nv ram board with different tune on it I was running for 15 mins & no problem!

Then I put the ostrich in it & was fine, so it maybe the nv ram board?

I will do a read on it tomorrow to see if it's the same area that got corrupted!

Not sure if it's going to help but I was logging with TP5 for each of the circumstances, when it happened it looses signal to be able to log!(comes up with errors)

Cheers VX L67 Getrag

[VL400]

If you can get a read of the DS using a programmer that would be handy to see.

[VX L67 Getrag]

I will do, but as it happened on my way home & don't have the programmer home I will do it when I get to work & then the problem is, my modem died at work & waiting for telstra to send out another 1, hopefully I get it today!

[VX L67 Getrag]

Woo Hoo, got my modem!!!!

On a bad note though the ds chip read exactly the same as what I put on it, so my guess is it must be a faulty nv ram board with a bad connection?

Could be where I had to solder the link wire in the 2 pins?

But it was the exact same fault, just didn't corrupt the sram this time, as it lost map signal & just keep flashing error can't log!

I can post up the difference's sheet but no pint as there exactly the same!