I've been trying to diagnose my problem. The converter locks right when I turn it on when its cold, but soon as it gets warm at all, it doens't lock at all. I've gotten it tuned and replaced the TCC solenoid and wiring harness, but no luck.

I got my hands on autotap, and it showed P1652 Vehicle Speed Sensor (VSS) output circuit. Would this be on the same page as:

P0502 Vehicle Speed Sensor (VSS)
-Low Input
* Second gear only
* Maximum line pressure
* Freeze shift adapts from being updated
* Inhibit TCC engagement

I know it didn't say low imput, but as soon as I scan it, and reset it, it comes right back. Should I replace my VSS ?

I also ran A log while I was driving, and I had it log the TCC PWM duty cycle. It would fluctuate between 0-90% like it was supposed to when regular driving, but soon as it hit 45 where its supposed to lock, i saw it go down to like 45% then to 65% then back to 90%. Is that normal? I'm pretty sure I remember the car throwing the p1860 code once before, but I'm not 100% positive.

 

I tried clearing the code 10 minutes ago, and it comes back right away. Any ideas?

 

P1652 is for the output circuit. This is the circuit from the PCM to the instrument cluster, cruise control module, BCM and radio (if you have speed controlled volume). The code is not for the VSS, itself (though, who knows if there might be something going on with it).

I would not think that P1652 would affect the TCC.

 

Where is the circuit located? Is it seperate from the VSS module on the tranny? Also, my gauges work perfect and so does cruise control. Is there anything you can think of shoebox, that would affect TCC? I've already checked, TPS, temps, replaced TCC solenoid and harness, tuned out misfire detection. Does the duty cycle on my TCC PWM sound right?

 

If your getting a consistant DTC1652, the speedometer(among other things) should not be working. I would have someone else with a different scanner pull the codes. If it is a true 1652 but the speedo and cruise work, you have a bad PCM.

Try getting it reflashed. We pay $69.00 to have it done at Auto Value.

The circuit in question is the dark green/white wire on the black PCM connector. It goes thru C220 which is a white 10pin connector located behind the RH kick panel.

There is no connection problem if your speedometer is working properly however. The problem must be inside the PCM where it is not detecting the state of output driver.

 

So replacing the VSS sensor would do nothing then. Well I guess i'm out of ideas completely. Out comes the converter.

 

How did you come to that conclusion?

 

I've been posting on here for the past month or so, trying everything I possibly can to find out why it won't lock. I've tried everything I possibly can, other than replacing my converter. So I just ordered a PI Vigilante 3200 Lock up. I think i've spent enough money trying to get it to work right, so I'm done with it.