Topic: TPS testing

[oldjeep]

Could you eliminate that connection by doing a manual controller? Cool toy.

AW Shifter

LOL - I bought one of those and it had some issues, I'm waiting for the replacement to come. 

The goal is to be able to have full automatic and manual mode.

[Jesse-James]

Nice.....Definately post pics when that project is done. Good luck with the wiring.

[oldjeep]

Nothing much to look at.  If I had realized what it was before I bought it I would have just made it myself.  I'm guessing all that is in that box is something like a PIC controller and 3 DPDT relays

http://oldjeep.com/images/YJ/Aw4Shifter%20001.jpg
http://oldjeep.com/images/YJ/Aw4Shifter%20002.jpg

[Jesse-James]

Where did you put the upshift/downshift buttons?

[oldjeep]

Where did you put the upshift/downshift buttons?

They're on side of the shifter stick.  I've got a Lokar shifter that I modified to work with the AW4

[oldjeep]

Think I came up with a solution.  I cut up an extra throttle body and created a bracket that will let me attach it to one of the throttle body bolts.  Still need to create a solid linkage between the 2 arms - using the peg normally used for the AC idle booster.

[oldjeep]

It works!  Need to get a different linkage piece, only had one clip on end in the garage so this is a temp cable.

[aw12345]

seems to me you need to find a way to rig the correct tps onto the throttle body since the trans needs that input to shift correctly or fins a later transmission computer that will work with the tps that you have. It needs this sensor to calculate engine load kind of like the old fashioned kickdown and vacuum modulator on older automatics.
Electronic transmissions need a speedsensor tps input and for the overdrive it often needs a temp sensor this last one could affect the torque convertor clutch also

Art

[oldjeep]

seems to me you need to find a way to rig the correct tps onto the throttle body since the trans needs that input to shift correctly or fins a later transmission computer that will work with the tps that you have. It needs this sensor to calculate engine load kind of like the old fashioned kickdown and vacuum modulator on older automatics.
Electronic transmissions need a speedsensor tps input and for the overdrive it often needs a temp sensor this last one could affect the torque convertor clutch also

Art

Huh?  The second TPS I added sends the proper electrical signal to the AW4 TCU.  The TV cable from the aw4 was already hooked up.

[aw12345]

Sorry I read the part about mounting the correct tps afterwards. Seems like you got this thing all setup also looked at your tire carrier nice job. Will make a very nice Jeep when you are done with it

Art

[Guardian7]

The TPS is very simple to test, they are simply a variable resister normally made from a small piece of PC board
with a carbon resister layer on it. When a spot gets worn it will go open on an Ohm Meter. When testing both sides just make sure a smooth gradual increase and decrease in resistance is seen on the meter as you turn it, if at any time your reading goes open you need to replace it. I have had these go bad and the engine idle became erratic but the vehicle still remains drivable. Also some TPS units by design go open at full throttle to cut out the AC compressor and give you extra power for those hard freeway hill climbs.