ok i have 96 sport auto OD not work. i unplucg the TCU i beleive it call the box under glovebox and manualy shift an OD works. plug back in and check the trans sellnoid and reads 15.8 ohms and i also adjust kickdown cable as described in free fix and still no OD. oh also tried pulling back on brake nothing. Help please

 

There are (3) solenoids. S1 and S2 are shift solenoids and supposed to be off for 4th to work. S3 is the lockup solenoid.

The TPS is on the throttle body and the VSS is on the tailhousing of the trans. Both send signals to the TCU. The brake switch affects the lockup.

Did you check all (3) solenoids? Did you check the input and output voltages at the TPS?

PM me your email address and I'll send the AW4 manuals.

 

i still confused i look at manuals and did some testing and got frustrated so went to advance and put code reader on and said the TBS was high volt so i replace still same jut check engine light is out. any othe rhelp please

 

glad you asked this , because my 98 is doing the same and replaced the TPS too hopefully somebody will know

 

this is driving me crazy as from what i see the S1 S2 solenoids are good as they show 12.8 ohms i check an clean NSS and adjust it good no i just test brake switch and it show good even pull back while driving nothing. replaced TBS nothing as the code said had high volts still no work. Now what do i do or check any help PLEASE. does shift manually with TCM unplugged. Thanks anybody

 

Where is the tcu just right under the glove box what does it look like this is the first I've heard of it. I'm gonna unhook it ,eating me alive in gas. Is there just a plug u unhook

 

box rite under glove box has a 16 pin connecter or easer if you can find the fuse pull it then you shif manually. i not found the fuse yet.

 

Thanks brother hopefully we can figure out what is wrong with these heeps

 

I did some research and some other people on jeep forum told me they did away with the fuse after 95

 

i still working on i let all know if i fix what a pain in *****

 

Yeah I know what you mean and thanks a lot good luck

 

The fuse is in the power distribution box under the hood. Its fuse #21 mini 10amp(red) in my 1996.

If you pull the fuse or unplug the TCU, it won't shift electronically, so will never engage S3 for lockup.

Firedan, did you test S3? S1 and S2 are shift solenoids while S3 is the lockup solenoid.

You mention the scanner showing high voltages. Did you test the TPS? It has 3 leads and you can push a wire or paperclip into the back of the connector where the wires go in. One lead is 5v inpu, anther is output, and the other is ground. With the ignition on, but engine not running, use the paper clip and your VOM. Put your ground lead on the body ground or battery ground. Actually, now would be a good time to verify that your body ground is good.....should show less than 1/2 ohm resistance, or the same as the meter leads touching. Anyway, you should see 5-5.1v input and output on mine was .76v with the throttle closed and 3.8v wide open. Check and see what you have and report back.

You can shift manually, but you'll only have 1, 3 and OD. You'll never get 2nd unless you're in 1-2 and push the revs to 4500+ and then it will pressure shift.

When I was out for a drive today I tried to see when mine was shifting. Obviously the shift points varied depending upon how much throttle was applied. With light throttle I was generally getting 2nd at 20mph, 3rd at 30mph and 4th at 40mph and lockup at 45mph.

 

Which one is 21 I only have one 10 amp I unplugged and spit n sputtered.

 

yes on my old TPS it show the exact voltage you are saying that is when the cel came on and that when i got code reader on and said high voltage on theTPS. as for S3 duh i forgot that one run thru how to check so i know i am doing rite. thank so much

 

7 pin connector beside trans dipstick, female end, row that accepts 4 pins has the 3 solenoids. Use VOM set to measure resistance, and check in relation to ground.