ok added some new params to the editor for OS 12212156, under Trans TCC section. Requires version 2.23.590 or later.
Minimum throttle release
- this sets the TCC to Off when ever the TPS is below the thresholds
- there are two vehicle speed modes, high speed and low speed
- for each mode there is a low TPS threshold, if the TPS is below that threshold the TCC will switch to Off if the PCM is not in Coast mode.
From what ive seen the 4L80e cals do not use the Coast mode, but let me know if this new stuff just doesn't work for you and you see TCC Mode as "Coast" at any time.
When you set the thresholds it's probably a good idea to make sure the TCC will unlock at low throttle and low speeds, so try to change the VSS modes and high speed thresholds only as a first attempt.
I have also added a bunch of TCC related status bits to the scanner which will help you see why the TCC is changing to "Off". There are a lot of reasons why the TCC can be set to the Off mode.
eg.
- TqMgt or Misfire request Off
- trans is in 1st gear
- trans cold
- brake is on
- TCC fault
- slip related
- min throttle mode (the new params control this)
- large negative or positive TPS transients
- Off during upshift or downshift
etc.