View source for Saab 9-5 Radio virginization



Eeprom is 93c56B

The stereos in the 9-5's has a eeprom memory like the CIM that holds the radio pairing with a car. This pairing is very simple and can be recreated or erased if you open the stereo and get access to the eeprom

you can go about it in a few different ways:

== 1. Erase the eeprom ( write FF to all sectors ) ==
this will factory reset the stereo and allow it to be married to any car

== 2. Replace the eeprom with a new blank one ==
If you have problems with the car forgetting the pairing this might be the only way to permanently solve it.
Result will be the same as 1)

== 3. Write new pairing info into the eeprom specific for the car it will be fitted into ==
You should just be able to pop the stereo into the car and it will just work out of the box without Tech2

== 4. Use the info obatined from the eeprom to do the whole tech2 change vin dance ==
I would personally use 1,2 or 3 instead of this

The pairing code in eeprom is constructed from the last 6 digits in the cars VIN

below is the format of the code, the number denominates the position of the last 6 digits whereas 0 is the first and 5 is the last

Code1 (0x86-0x89): 1, 2, 5, 0, FF, 3, 4
Code2 (0x96-0x99): 1, 2, 5, 0, E2, 3, 4

== Example: ==
VIN: YS3********014952 Code 1: 1420FF95, Code 2: 1420E295<br>
VIN: YS3********059809 Code 1: 5990FF80, Code 2: 5990E280<br>
VIN: YS3********506588 Code 1: 0685FF58, Code 2: 0685E258<br>
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there is also a webpage that does the above for you and gives you a eeprom file you can flash to the car here: http://germka.sapro.ru/radiocode/<br>
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<big>shoutout to bojer for the research and germka for the webpage<br></big>