What do the different TCC modes mean?

[thunder550]

I'm just wondering what the difference between Apply, Apply Enable, Lock, Coast, and Off are. What is physically happening to the TCC solenoid and lockup clutch in the different modes?

[joecar]

If I remember from a dark crack in my mind...

Apply Enable: TCC sol = on
Apply: TCC sol = on, TCCPWM sol ramping up
Lock: TCC sol = on, TCCPWM sol >= 96%
Coast: TCC sol = on, TCCPWM sol ramping down
Off: TCC sol = off

I might have the first 2 swapped.

See bottom of this thread: showthread.php?p=21256#post21256 (http://forum.efilive.com/showthread.php?p=21256#post21256)

[joecar]

http://img463.imageshack.us/img463/9037/tccmode1qu.png


S-A = Slew ?
A-B = Off
B-C = ?
C-D = ?
D-E = Apply Enabled
E-F = Applying
F-G = Locked
G-H = Releasing
H-I = Coast ?
I-J = Off
J-K = Slew ?

If anyone runs into documentation showing the correct names, please post.

Edit: The TCC solenoid is ON from B to I, and the TCC PWM solenoid is controlling the shape of the curve.