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 Bosch MP5.1.1 identify chips 
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Joined: Fri Feb 01, 2019 4:25 pm
Posts: 2
Post Bosch MP5.1.1 identify chips
Hello, I am trying to reverse engineer MP5.1.1 ECU from my Peugeot 406..

Does anyone recognize these chips?:
Image

red is Bosch number 30312. This chip I'm the most interested in. I have already identified it is a interface IC for CKP, wheel speed and lambda sensor, but I would like to know pinout (I doubt there is a datasheet but you never know)

Green IC is Bosch B57570. It's most likely a 74 logic IC but don't know exactly which one.

Blue IC is complete mystery. Bosch number is 30117. It seems it's not connected to any external pin/sensor, but I would like to know what it's for.


Fri Feb 01, 2019 4:47 pm
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Joined: Fri Feb 01, 2019 4:25 pm
Posts: 2
Post Re: Bosch MP5.1.1 identify chips
Link to picture: https://i.imgur.com/6EUyJQA.jpg


Fri Feb 01, 2019 4:49 pm
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Joined: Tue May 26, 2009 4:10 am
Posts: 25
Post Re: Bosch MP5.1.1 identify chips
Bosch 30117: knock sensor IC CC195

If you see a PLCC28 chip in a Motronic from the 90's, it is most likely a knock sensor IC.
Also can be marked as 30301, 30389, etc.
Take a look in the attached datasheet and verify the IC pinout with your Motronic.


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Tue Jun 04, 2019 6:09 pm
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Joined: Tue May 26, 2009 4:10 am
Posts: 25
Post Re: Bosch MP5.1.1 identify chips
Bosch 30312: multi purpose IC for diagnostic port, lambda sensor, engine speed etc.

In older Motronics also 30015 (S600).

Not that important to know the exact function of this IC, it evaluates the signals from outside the ECU and feeds the B58466 (SAB80C515A) with them...

Mostly the output pins on this type of Bosch IC are very close to the input pins.
Examples:
K-line : in Pin 9 - out Pin 8, out Pin 9 (to 80C515 RxD, TxD)
Lambda: in Pin 14+16 - out Pin 17 (to 80C515 Analog Input ANx )
engine speed: in Pin 13 - out Pin 12 (to 80C515 INT3, P1.0)
The pin numbers are not from your Motronic, just examles, you get the idea...
Easy to check with an oscilloscope.


Tue Jun 04, 2019 7:04 pm
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