ABS/TCS

[Shannen Durphey]

> OB-GMECM: The traction control system on the 96 and eariler Y-body
> is partially controlled by the ECM and partially by another
> subsystem.  
Yes, this is ABS/TCS behind the driver's seat.

As you may or may not know, the system defaults "ON."
> >From what I can tell of the wiring in the service manual, there
> is no way to default the system off. 

What are you trying to do?  I'm looking at a schematic for a 93 and it
looks like a jumper from terminal 28 to terminal 1 at the EBTCM will
create a permanent ASR "off" input.  I've looked further and found no
trouble codes relating to "ASR Off switch fault".
Shannen

> control the ECM has is to retard the timing.  
>Can anyone confirm
> that, 
or give me any insight into possible table entries or
> parameters for the ASR system?
> 
> Thanks,
> 
>    Marc
> 
> --
>   Marc Randolph     -    mrand at pobox.com    -     PGP keyID: 0x4C95994D
>      If you have any info on the mid-60's car called the Bill Thomas
>        Cheetah, or know anyone that might, please contact me.