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Go Back   GSM-Forum > Non GSM/Mobile Related Forums > CAR Electronics

CAR Electronics however its a non GSM/Phone Related, but why not !! you can get here All Car Electronics Programming and Unlocking tools & Codes.

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Old 10-29-2011, 21:37   #1 (permalink)
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pu2295a 93c46 vin change pointers

Hi,
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
Attached Files
File Type: rar try4.rar (169 Bytes, 52 views)
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Old 10-29-2011, 22:32   #2 (permalink)
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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.
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Old 10-29-2011, 22:53   #3 (permalink)
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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
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Old 10-29-2011, 23:19   #4 (permalink)
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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 :-(
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Old 11-04-2011, 13:22   #5 (permalink)
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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
Attached Files
File Type: rar wed02.rar (151 Bytes, 36 views)
File Type: rar VERIFY.rar (151 Bytes, 34 views)
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Old 11-04-2011, 15:02   #6 (permalink)
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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...
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Old 11-04-2011, 15:08   #7 (permalink)
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Hi friend, last dumps look good. Try you read as 16 bits?
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Old 11-04-2011, 15:15   #8 (permalink)
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Hi Argento. i check dump edited, but i see it is a pu2294...
i think NOT work
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Old 11-04-2011, 15:19   #9 (permalink)
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Why? Sorry 4 question, I never work with this one... Can we found another dump for Incartunes?
BTW, good morning my friend!
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Old 11-04-2011, 15:22   #10 (permalink)
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i have a good dump in some place
just to check my theory...
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Old 11-04-2011, 15:25   #11 (permalink)
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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
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Old 11-04-2011, 15:29   #12 (permalink)
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i just tried 8bit not work. just 16bit.
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Old 11-04-2011, 15:32   #13 (permalink)
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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
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Old 11-04-2011, 15:35   #14 (permalink)
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Ok, one more thing you can try... after rewrite dump, discharge capacitor near mcu. Look http://i443.photobucket.com/albums/q...yx/Closeup.jpg
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Old 11-04-2011, 16:05   #15 (permalink)
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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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