Very good to know, thanks all, I hadn't seen the B82 pin #5 portion before. So it looks like I need to ground that connecter, and then do the drive, stop, go in reverse, floor it, turn my blinker on, flash the headlights, and pop the cigarette lighter action to get the code?
The pdf was also very informative. My time lag test and stall test are perfect. Reading the pdf makes me remember why I suspect the TPS... I need to get the code...
From the pdf:
If a speed sensor fails, the remaining sensor signal will be used.
- Seem good here
In case of throttle sensor failure, the idle contacts will signal the throttle opening. Line pressure will go to maximum at open throttle and it will go to minimum at closed throttle.
- Granny shifting at 2500rpm doesn't seem to fit this, the very hard shifts do. But full failure would throw lights and I rarely get them.
Therefore, an inhibitor switch failure has no effect. If multiple signals are seen in the forward ranges the inhibitor switch is ignored and there is no fourth gear.
- Good there
If shift solenoids #1 or #2 malfunction, the TCU deactivates the other. This
results in either 3rd gear or Reverse (when selected).
- No problems there either
If duty solenoid “A” fails, line pressure goes to maximum.
- This would be the case for the hard shifts, but not the granny shifting.
If duty solenoid “B” fails, the torque converter lock-up will not occur.
- Good here
If shift solenoid #3 malfunctions, the overrunning clutch is always “ON” and
there will be engine braking during deceleration.
- Good here
If duty solenoid “C” should fail, the AWD control will be set to maximum and
the rear wheels will always be powered.
- I have no torque bind.
I got this from the '98 service manual...
TROUBLE SYMPTOM:
Shift point too high or too low; engine brake not effected in “3” range: excessive shift shock; excessive tight corner “braking”.
And it makes sense that it doesn't downshift regardless of throttle position. The intermittent nature of the problem is making troubleshooting problematic though...
As far as erroneous shift patterns, the General Diagnostic Table only lists a few problem children:
Shift characteristics are erroneous.
1) Inhibitor switch
2) Control module
3) Vehicle speed sensor 1
4) Vehicle speed sensor 2
5) Throttle position sensor
6) Control valve
When you add in the very rare non-shifting, there are only two things common...
No shift occurs from 2nd to 3rd gear.
1) Control module
2) Control valve
3) High clutch
4) One-way clutch (3-4)