Car ECU and Alternator Regulator comunication protocols

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Hi there,

 

I am trying to collect informations about the comunication protocols between a car ECU and alternator regulators.

 

As I red in the internet some of the protocols that are used are:

 

COM   [BSS (ver.1, ver.2),    LIN (ver.1, ver.2)],

SIG     [FORD,    PCM]

PD      [Hitachi,    Mitsubishi],

RLO.

RVC,

C

 

My questions are:

1.    I am wondering if there are other protocols that are used and I didn't show them in the list above.  Does anybody knows anything about this ?

2.    I didn't find any information (to read and understand) about all ather protocols in the list above, except the LIN protocol.  Does anybody knows anything about this ? (any link, or .pdf ??? )

 

Thank you in advance,

 

Michael

 

 

Michael.

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I dare say a lot of this is proprietary, so you might be having trouble getting information. There might be some SAE documents, but these cost.

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Would you be able to help me find the way to find and buy them ? 

Michael.

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If the car is >= 2007, it has a CAN bus and the ECU and perhaps a dozen or more modules communicate on this bus. I have never heard of an alternator with a computer in it. It has diodes in it. When it spins, it outputs 12+ volts. The voltage regulator controls the field to control the voltage. This control probably is an analog from the ECU. Not CAN. Get a Kvaser Leaf and you can record every packet on every CAN node. 100s of K of hex bytes.

 

 

Imagecraft compiler user

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Bob, alernators are 'smart' these days. They have a micro in them.

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I think Kartman is trying to punk me. Does ANY OTHER avrfreak think that there is an alternator with a micro in it? I mean I did a lot of looking (for me) and there is lots of explanation of 1, 2 and 3 wire alternators, but I guess I'm willing to be educated. What make and model has one?

 

Imagecraft compiler user

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BMW and most euro since the 2000's
http://www.apra-europe.org/dateien/gallery/Krakow_2012/DownloadsPresentations/8_Sitarski_TESTER_COM_ALT_nichtvertraulich.pdf

Google alternator bss lin
Even your friends at Freescale make smart alternator controllers.
http://cache.freescale.com/files/analog/doc/data_sheet/TC80310.pdf

When things went throttle by wire the control is demand based - throttle and ancillary loads are used to compute the amount of throttle, fuel etc needed to meet the demand. Before that the ecu had to read the throttle position and do whatever necessary - this wasn't good for economy or emissions.
Things have come a long way since your Chev Impala!

Last Edited: Wed. Jul 15, 2015 - 01:06 AM
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During my searching all thiis days I found a lot of information about all those protocolls except the

 

RVC (or L(RVC)   )  ,   BSS1  and BSS2

 

Does anybody knows anything ?

 

I also found this :

 

http://www.bosch-semiconductors....

 

Is there any more detailed datasheet about the CY320 ?    I am trying to understand the BSS1 and BSS2 protocols.

 

 

 

Michael.

User of:
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What says ya Bob?