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Which is which...?

1K views 6 replies 5 participants last post by  MoistCabbage 
#1 ·
Hi All,

Ok I've searched and can't find an answer.

If the ECM is in the relay/fuse box next to the battery what is the computer under the dash on the drivers side of the Catera?

I'm having issues with the speedometer and the tachometer not working along with no cruise control. Sometimes if I reset the codes, even when there are none, it all comes back to life for a while.

I occasionally get a random cylinder miss code but that’s it.

So which computer do I look at to replace or get rebuilt?

Tks for any assistance.

DJ
 
#2 · (Edited)
#6 ·
Yes but that's not what he needs to look at. Speedo and cruise control are dependent o the EBTCM for speed info. Tach should work though. Pull the codes and if you see U2108 it's the EBTCM. If resetting the ECM fixes things temporarily it can't be a fuse. No brake line wrenches needed since they don't have to be disconnected. The brakes will continue to work without the EBTCM but not the ABS.
 
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