mspiegle

Does anyone know what the part number is for the 5-pin throttle sensor on a '94 GTS?

WallyP

I don't know about a sensor, but the throttle switch for the '94 is 928.606.157.01

Jim bailey - 928 International

Part # 928 606 157 01 is the throttle valve switch 1994>, As I recall on the automatic it allows for a part throttle kick down ........

wds928

If you are referring to the throttle-valve switch, there are two.

p/n 928 606 157 00 (driver's side) and 928 606 157 01 (passenger side) according to PET5. I've attached a diagram from PET, but don't know if it will show up or not.

mspiegle

from working on chris' car, I noticed that it seemed to be a variable TPS and idle switch in 1 package. I didn't fully confirm this, but if it is true, then I can use it on my 86.5 to provide an accurate throttle deflection signal to an SMT6. This might also work on E30 BMWs because they use a similar throttle switch. Its got me excited =)

Jim - do you sell that part?

Jim bailey - 928 International

Porsche" To make the 928GTS with automatic transmission a more agile vehicle,a dynamic kick-down has been introduced for model year 1994. The dynamic kick-down is connected in parallel to the static kick-down switch.............". it senses 24 degrees of open throttle . I believe It does not send a variable throttle position signal.

GoRideSno

Mike,
Maybe you could test the switch somehow when we return to Chris's garage.

5 pins I wonder what they are for?
3 for a non-GTS switch. 1 for ground. 1 for idle. 1 for WOT.
2 more for GTS switch. 1 for 24 degree of open throttle? Another to tell the computer how fast it got to 24 degrees open throttle?

If my guesses for the 2 extra are correct it may still be used as a varible switch somehow, though probably not as good as you intended.

HTH,
Andy K

mspiegle

well, i was able to measure a changing resistance across a couple pins. That's a "variable signal" right there, however I believe REAL TPS sensors output a voltage from 0-5 based on deflection. so, unless this thing takes a 5v reference and outputs a variable voltage based on deflection, I would need to rig something up.

mspiegle

Ok, i've obtained what I *think* is a GTS TPS. It has bosch # 0 280 120 400 on it - can anyone verify if that is the correct TPS?

It has 6 pins on it, and appears to match the wiring diagrams for the '94 GTS - however it doesn't seem to provide a WOT signal.



As you can see, the 3 pins on the left are for the variable portion of the TPS, and of the 3 pins on the right, the middle one isn't connected to anything (that's supposed to be the WOT pin). So, which brings me to an interesting question... Since it looks like the TPS was made this way, does the GTS not have a WOT signal for some reason?

mspiegle

Ok, did some more research, and bosch says the part "0 280 120 437" is for the '94 GTS. Since that part is different than what I have, that could explain why the WOT signal doesn't exist.

frances

Ok i got an answer to my previous message.
Thank you for the picture (years later it is still useful).
Definitely the 0 280 120 400 doesn't have a WOT switch you can clearly see it from the center pin on the microswitch which is simply disconnected and the lateral 6 and 4 which are for the idle signal.
The pic also prevented me from opening the sensor .
I don't know how the ECU can get a WOT signal either (if there's a way to get it) with this sensor. Certainly not with a "continuity" signal.
By testing the sensor i couldn't find any traces of WOT signals.
The only one is in the variable portion of the sensor where about 4.5 KOhm is given in WOT condition (obviously).