[Gmecm] Torque converter clutch on 1226869

davesnothereman at netscape.net davesnothereman
Sat Mar 25 01:19:43 UTC 2006


Are you using an automatic transmission calibration?  Do you have the 
broadcast code from the original 1 bar calibration?

Zaphod


-----Original Message-----
From: David Allen <davida1 at hiwaay.net>
To: GM-ECM <gmecm at diy-efi.org>; diy_efi at diy-efi.org
Sent: Fri, 24 Mar 2006 18:19:39 -0800
Subject: [Gmecm] Torque converter clutch on 1226869

     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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