[Gmecm] Torque converter clutch on 1226869

[DV Fagan]

David,
Has the TCC output ever worked?  It might be a dead
output bit on the ECM.  Try adding a switch to ground
to the output so you can switch the TCC on manually.
Dennis

--- David Allen <davida1 at hiwaay.net> wrote:

>   I'm playing with my 6869-controlled turbo car, and
> trying to get the ECM
> to control the torque converter clutch.  It seems
> there are no numbers I can
> put in the calibration which will actuate the TCC
> output.
>   I have a test light on the TCC ouptut at the ECM
> to emiminate any other
> external factors.  Some things I have verified:
> 
> Scan data shows the trans in "Drive"
> Scan data shows coolant is hot.
> Scan data indicates vehicle speed; and is reasonably
> correct.
> Scan data indicates TPS is working; and is
> reasonably accurate.
> No DTC's present.
> "Automatic Transmission" is selected in the ECM
> calibration.
> Test light does work when manually grouned.
> 
> I have tried putting very "loose" boundaries in the
> ECM to make it lock up
> most of the time but can't get it to illuminate the
> light.  No combination
> of road speed and throttle position will make it
> actuate. The schematic does
> not indicate any high gear switch on this ECM. What
> can I be overlooking?
> Thanks in advance,
> David


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