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10-29-2011, 20:37 | #1 (permalink) |
Crazy Poster Join Date: Oct 2011 Location: Newcastle, UK
Posts: 56
Member: 1678683 Status: Offline Thanks Meter: 2 | pu2295a 93c46 vin change pointers first try at reading and changing an eeprom so please bear with me. i have myself a c-u-s.co.uk p2k eeprom reader and using pickit2 programmer to read the 93c46. from the clarion pu2295a attached is one of the many different dumps i have extracted but looking at other peoples on here it still doesnt seem to be right. i have hxd hex editor to try and make sense of the dump but not getting anywhere fast. am i doing something silly wrong? or do i need another program to figure out the dump? im tryin to change the vin from whatever is in to vf7chnfvb39321815 cheers David |
10-29-2011, 21:32 | #2 (permalink) |
No Life Poster Join Date: Jul 2007 Location: Republic of Yorkshire
Posts: 2,037
Member: 538927 Status: Offline Sonork: M1DJF Thanks Meter: 891 | You need hex editor and look at the bottom line of the dump you can't go wrong I hope you know that 93c46 has rotated pins. |
The Following User Says Thank You to M1DJF For This Useful Post: |
10-29-2011, 21:53 | #3 (permalink) |
Crazy Poster Join Date: Oct 2011 Location: Newcastle, UK
Posts: 56
Member: 1678683 Status: Offline Thanks Meter: 2 | Hi m1djf, Yeah, tried the rotated pins, looking at other peoples dumps the vin is in the 2nd last and last line but there doesnt seem to be anything like that on my dump? Would I still get a dump file if I still have the pins connected up wrong? Or do you think its the hex editor program I need to change for a different one? Cheers, David |
10-29-2011, 22:19 | #4 (permalink) |
Crazy Poster Join Date: Oct 2011 Location: Newcastle, UK
Posts: 56
Member: 1678683 Status: Offline Thanks Meter: 2 | had a thought, starting from the last digit on the last row and working backwards would i just change whatever is there for the vin number or would the existing data of a proper dump look like a vin number anyway? the right hand column of my dump when viewed in hex editor seems to be just funny symbols and not like others where it resembles the vin number. trying to understand and figure it out :-( |
11-04-2011, 12:22 | #5 (permalink) |
Crazy Poster Join Date: Oct 2011 Location: Newcastle, UK
Posts: 56
Member: 1678683 Status: Offline Thanks Meter: 2 | still stuck on this one, managed to get a dump that looked good, change the vin, resoldered the chip to the radio and still beeping, any ideas any body? i fear this is the last time the chip will be coming off the board without damaging something, want to make sure its 100% before i resolder it again. old vin dump = wed02.rar changed vin = verify.rar cheers David |
11-04-2011, 14:02 | #6 (permalink) |
No Life Poster Join Date: Oct 2008 Location: Las Piedras.Uruguay
Posts: 923
Member: 883282 Status: Offline Sonork: DI kronoS Thanks Meter: 432 | verify dump looks good! check if eeprom is working good -in the programmer- then solder and verify all pins, that's all. only trouble you must check is swap byte, but if you use only one programmer no trouble i think... |
The Following User Says Thank You to kbzaloka For This Useful Post: |
11-04-2011, 14:25 | #11 (permalink) |
Crazy Poster Join Date: Oct 2011 Location: Newcastle, UK
Posts: 56
Member: 1678683 Status: Offline Thanks Meter: 2 | Hi Guys, Thanks for helping, will try and check if eeprom working good in the programmer, i read another dump file from it today and it still comes up the same as verify.rar. is there another way i can check everything works other than by just reading dump? the only difference i can see is the vin section on mine starts 4vf7... others i have seen start 4.vf.... would that make any difference? it is read at 16bits, should i try 8bit? once i got the dump with a vin i thought i was sorted so didnt try any more ways. thanks |
11-04-2011, 14:32 | #13 (permalink) |
No Life Poster Join Date: Oct 2008 Location: Las Piedras.Uruguay
Posts: 923
Member: 883282 Status: Offline Sonork: DI kronoS Thanks Meter: 432 | 16 bytes ok! here's another dump. few differeces but it can help. i can't attach so paste it, sorry by the way your edition was succesful. good luck put special attencion on solder chip and position of pin one FF FF FF FF FF FF FF FF 12 34 00 00 00 00 08 00 00 00 16 00 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 12 34 96 32 59 24 80 07 00 00 00 01 01 00 00 00 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 C8 0F 00 12 34 56 46 37 43 48 36 46 5A 42 33 38 38 30 37 38 39 37 FE |
11-04-2011, 14:35 | #14 (permalink) |
Freak Poster Join Date: May 2007 Location: San Jose, Costa Rica Age: 46
Posts: 244
Member: 504871 Status: Offline Thanks Meter: 165 | Ok, one more thing you can try... after rewrite dump, discharge capacitor near mcu. Look http://i443.photobucket.com/albums/q...yx/Closeup.jpg |
11-04-2011, 15:05 | #15 (permalink) |
Freak Poster Join Date: May 2007 Location: San Jose, Costa Rica Age: 46
Posts: 244
Member: 504871 Status: Offline Thanks Meter: 165 | VIN number is ok for Citroen. Your dump as 16 bits is ok. Only a question... are you trying this work on your bench or in your car? Because in your bench... forget it! |
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