Hello again, apologies but I have another noob question.
I read a post where someone mentioned swapping the flash content from another car,
into yours, and this would be ok as long as the eeprom content in your car is left unchanged
(the ecu numbers and car models being the same).
This is what I would like to do, however I found that the flash prom (29F800BB) also
contains the vin number. I'm just wondering if this is normal, and only the vin in the
eeprom counts, or for the ME 7.8.4 a straight flash content swap is just not possible
without modifying the vin number in the flash.
This is the vin number section from the flash I would like to use:
1FCB0 FF FF FF FF FF FF FF FF FF FF 1D 97 00 00 C3 3C ÿÿÿÿÿÿÿÿÿÿ.—..Ã<
1FCC0 30 30 34 31 36 31 30 30 30 32 36 31 32 30 36 35 0041610002612065
1FCD0 37 39 39 39 36 36 31 38 36 30 34 30 30 31 37 30 7999661860400170
1FCE0 34 2E 32 37 FF 46 50 52 49 FF FF FF FF FF FF FF 4.27ÿFPRIÿÿÿÿÿÿÿ
1FCF0 FF FF FF FF FF 30 37 38 32 36 52 54 30 30 30 30 ÿÿÿÿÿ07826RT0000
1FD00 07 30 31 30 32 34 32 35 00 00 00 00 00 00 00 00 .0102425........
1FD10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
1FD20 00 00 00 00 00 00 00 00 00 00 01 90 19 57 50 30 .............WP0
1FD30 5A 5A 5A 39 39 5A 34 53 36 39 31 38 32 36 00 00 ZZZ99Z4S691826..
1FD40 07 4F 17 34 4F 64 6E 13 05 04 34 36 33 30 37 36 .O.4Odn...463076
1FD50 33 35 08 1E FF FF FF FF FF FF FF FF FF FF FF FF 35..ÿÿÿÿÿÿÿÿÿÿÿÿ
1FD60 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
This is the flash that was in the car:
1FCB0 FF FF FF FF FF FF FF FF FF FF 1D 97 00 00 C3 3C ÿÿÿÿÿÿÿÿÿÿ.—..Ã<
1FCC0 30 30 34 31 36 31 30 30 30 32 36 31 32 30 36 35 0041610002612065
1FCD0 37 39 39 39 36 36 31 38 36 30 34 30 30 30 37 30 7999661860400070
1FCE0 33 2E 31 37 FF 46 50 52 49 FF FF FF FF FF FF FF 3.17ÿFPRIÿÿÿÿÿÿÿ
1FCF0 FF FF FF FF FF 30 37 38 32 36 52 54 30 30 30 30 ÿÿÿÿÿ07826RT0000
1FD00 07 30 30 36 30 33 33 34 00 00 00 00 00 00 00 00 .0060334........
1FD10 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
1FD20 00 00 00 00 00 00 00 00 00 00 00 EB AE 57 50 30 ...........ë®WP0
1FD30 43 41 32 39 39 39 33 53 36 35 33 31 39 37 00 00 CA29993S653197..
1FD40 02 03 17 34 4F 64 1F 0A 03 03 34 36 32 30 33 36 ...4Od....462036
1FD50 31 33 08 61 00 57 50 30 5A 5A 5A 39 39 5A 33 53 13.a.WP0ZZZ99Z3S
1FD60 36 30 38 35 35 36 00 00 02 03 17 34 4F 62 ED 01 608556.....4Obí.
1FD70 07 03 34 37 32 30 33 36 31 38 08 0D 00 57 50 30 ..47203618...WP0
1FD80 5A 5A 5A 39 39 5A 34 53 36 39 30 38 34 34 00 00 ZZZ99Z4S690844..
1FD90 02 CB 17 34 4F 63 44 17 09 03 34 37 32 30 37 36 .Ë.4OcD...472076
1FDA0 30 41 08 53 20 57 50 30 5A 5A 5A 39 39 5A 34 53 0A.S WP0ZZZ99Z4S
1FDB0 36 39 30 38 34 34 00 22 01 56 17 34 4F 62 15 06 690844.".V.4Ob..
1FDC0 08 04 34 37 32 30 37 36 33 30 07 D0 FF FF FF FF ..47207630.Ðÿÿÿÿ
1FDD0 FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
Strange that the last flash code has multiple vins. I'm guessing that each time an
ecu is modified for a different car (with an official tool?), the new vin number
is tagged on without erasing the old ones?
Anyways, it looks like changing the vin may not be straight forward. Apart from
the final checksum correction, the vin numbers (WP0...) have other information
added around them. Any ideas on this?
Ok, thanks for reading this far. I had one more thing I was wondering about: when
a checksum program is used, why is a comparison needed with the original unmodified
file?
