Bosch ABS Wheel Speeds

[EuroRace]

Does anyone have a wire diagram or know the wheel speed output pins on a Bosch ABS unit. # B265 153 259.
Posche # 993 618 125 70. This is a 993 Cup ABS unit. I have been looking & asking all over the globe, but no info available. Thanks.
Eurorace

[figgie]

Have you tried to contact Bosch directly?

They are usually pretty good at keeping technical specs on hand regardless if it is BMW, Porsche or Mercedez-Benz.

[EuroRace]

I have contacted Bosch, Porsche Motorsport, and Motec USA, but have no help as of yet.
Thanks

[uvii]

Geoffrey Ring on Rennlist would probably know, as I think he runs one on his 964 race car. Here is his website:
http://www.racetek-engineering.com/

[Martin]

On some bosch pumps, even with different part Nrs these are the speed output pins. On some pumps the "wake-up" (Ign12v) wire is on a different pin. If you want further details on pinouts let me know. I think these might be applicable to your pump aswell, maybe post a picture of the pump and of the connector.


8
10
12
14

Martin Roets

[EuroRace]

All the pins on the pump go to Power supply, Control unit, Relays. No wheel speed outputs on the pump. I am resonably sure the wheel speed outputs come from the small pins on the control unit.
Thanks

[Martin]

The pinouts i gave are for Certain bosch ABS pumps. Like the ones found in BMW`s. (those pins are the actual output pins on the ABS pump.

On the bosch pump like the one found on the RX8 pin AA is the Vehicle speed output

[EuroRace]

I think I found the outputs, it seems like the in the center row of pins, # 40 & # 42 are the wheel speed outputs.
We will test it today & reply.

[EuroRace]

The wheels speed outputs are 40 & 42, works fine. You only get 1 front 1 rear signal.

[gring]

The 996 Cup ABS system has several pins switched from the 996 GT3 street wiring diagram. Call me if you get stuck.