I'm in pretty desperate need of the pinout for the TPS on a 1988XT. I hear the NA and turbo ones are the same, so that doesn't matter. Needs to be for the MPFI w/ the spider manifold.

 

Hope someone can help! Thanks.

::bump::

IF anyone can scan a picture to back up what I'm going to describe that would be great.... I am looking at the 87 FSM for the spider intake on the MPFI "section 6" in :

 

chapter 6-3

PAGE 10 Figure at top of page.

 

The TPS connector is called E5 which is a black ( 4 pin flat across connector. In the drawing it connects to the firewall side of the spider on the passenger side.

 

the plug is numbered pins 1,2,3,4 (there are fins to indicate top and bottom) [a fin ABOVE pin 1 and 4] [a wider fin BELOW most of pin 2 and 3]

 

1=R = red = Sensor signal

2=W=white = Power (sensor)

3=B=Black = ground

4=LW=blue w/ white stripe = power (idle switch)

 

the E5 wires go into the E8/F60 connector this is the 15 pin connection plug NOT THE 16 pin plug. (E8 is the engine side of the connection)[F60 is the firewall side of the connection]

 

 

by disconnectiong the E8/F60 connection; you can see on F60 that the #1 pin is in the upper left corner (standard left to right, top to bottom form)- #1 pin is the LW wire from the TPS(originally pin 4 as above).

 

that being said here is the rest of it

F60 #1 = #4 TPS

F60 #2 = #3 TPS

F60 #6 = #2 TPS

F60 #9 = #1 TPS (heads up this changes to G= GREEN along the way)

 

F60 ends at the "control unit." The MPFI box under the rear dash is this "control unit" there are 4 rectangular connectors.

 

Your concerned with T8 and T9.

T8 = 16 pins that clip into the MPFI box (2 ribs on top and 8 plugs per row)

T9 = 15 pins that clip into the MPFI box (2 ribs on top and 10 plugs per row)

 

F60 (G or R) #9 = #22 pin on T8 (2nd to upper right most pin)

F60 ( W ) #6 = #21 pin on T8 (upper right most pin)

F60 (BR or #2 = #16 pin on T9 (5th one in from bottom left)

F60 ( LW ) #1 = #25 pin on T8 (4th one in from top left)

 

Book 2 Sections 2 and 3

chapter 2-7 page 20

 

IF you can have access to a Volt/ohms meter then here is the other stuff

 

Resistance between pin 3 and 2 ON THE TPS = 6 -18 Kilo ohms

 

if outside range replace sensor.

 

Resistance between pin 3 and 1 ON TPS :

a.) 5.8 - 17.8 Kohms (throttle closed)

b.) 1.5 - 5.1 Kohms (throttle open)

 

Ensure Resistance changes smoothly between fully closed and fully open throttle positions. If resistance is outside spec's then replace it.

 

WOW. how about them apple eh Tex?

Steve, If you want to bring it over, I can scan it

lets hope he can "see" it in his car and head from my babling first ..... :-p

wow, cool. This should work. I'll let you know if i need the scan. Thanks a lot!!