Jeep TJ TPS Problem - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 08-27-2005, 09:26 PM
Thread Starter
Join Date: Aug 2005
Posts: 6
dst55 is on a distinguished road
Jeep TJ TPS Problem

I've been having trouble with troubleshooting an electrical problem with my "98" TJ. My Jeep is running rough and the Check Engine light came on after my Jeep got caught in a downpour with the top down. I plugged a code reader into it and the reader said my Throttle Position Sensor was reading high at .78 volts. I replaced the TPS and the problem persists. With the ignition on the supply voltage to the sensor pin 3 is 5.13 volts, pin 1 is at ground or 0 volts and pin 2 still reads around .8 volts with the throttle closed. I'm at a loss how to continue troubleshooting my problem. Any assistance with this problem would be greatly appreciated.

Additional information: the horn goes off by itself, and sometimes the fuel gauge intermitently fails and shows Empty with plenty of fuel in the tank.
dst55 is offline   Quote
Old 08-27-2005, 09:54 PM   #2
Shake 'n Bake

WF Lifetime Member
khenderson's Avatar
Join Date: Apr 2005
Location: PHX
Posts: 1,344
khenderson is on a distinguished road
Send a message via ICQ to khenderson Send a message via AIM to khenderson Send a message via Yahoo to khenderson
i would actually start with tearing the dash apart and letting it set to make sure it's completely dry. check all connections, then put it back together and check it again. unless you are sure it's all good and dry, then maybe someone else can point you in the right direction, cause i'm at a loss.

I'ma come at your like a spider monkey!

khenderson is offline   Quote
Old 08-27-2005, 10:31 PM   #3
amerijeep's Avatar
Join Date: Apr 2005
Location: Mississippi.
Posts: 4,057
amerijeep is on a distinguished road
Well, for any electrical device to be activated, a circuit has to be completed. Take the horn for example. The only break in the circuit for the horn is at the switch in the sterring column. There has to be something completing the circuit. Sounds like it is most likely water. The fuel gage sounds like it is loosing voltage however. Most likely water is causing it to ground out. Rip her apart like Kyle said and try to dry it out. I'd pay extra close attention to your fuse block, too. The water is causing you havoc, no doubt.
To all who serve, Thank You.
amerijeep is offline   Quote
Old 08-28-2005, 12:40 PM   #4
Join Date: Jun 2005
Location: North East Georgia,USA.
Posts: 221
Ed in North Ga. is on a distinguished road
those numbers actually sound close to normal..a little off, but close.

the 5.13 should be 5
0.8 should be .85

15% when your actually looking for 17% duty cycle

manual tranny specs.

its not the TPS per`se, its the input to the TPS thats giveing the problem- adjust the input down. Thats the top bolt for you-leave the bottom snuggish. Nudge the tps left or right from the top of the connector and retest for input voltage.

If it stays 5.13 volts, its the input wire (a)- it should be steady at 5 volts.

it really sounds like theres something in the ground circut causeing a higher than normal amperage draw/voltage needed-high enough to cause a problem, low enough not to pop fuses- water would do this, but only if it was in real close proximity to something with power on it- like the input from the TPS connector to the ICU connector...under the dash...where it got wet.

thou shat unplug thy connector and blow air into thee, and all shall be well.

or the computer is fubared...whichever.
Ed in North Ga. is offline   Quote
Old 08-29-2005, 07:49 AM
Thread Starter
Join Date: Aug 2005
Posts: 6
dst55 is on a distinguished road
TJ TPS Problem

khenderson, amerijeep, and Ed in North Ga.
Thank you for the input. I tried to run with the Heater and defroster on to help dry the dash out (lottsa fun during August in Alabama) but to no avail. Time to break out the screwdrivers and heat gun and start looking closely at the connectors and fuses. Thanks again guys.
dst55 is offline   Quote

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
4.2 carb problems stray YJ Tech Forum 25 10-27-2016 01:16 AM
Had the best ride in my Jeep so far.... hedonist Off-Topic 8 01-08-2008 10:06 AM
vibration noise problem on 2k Jeep manual tranny Kruth General Jeep Discussion 5 11-19-2007 03:59 PM
1990 jeep wrangler problem mbehr WF New Member Check In 14 02-21-2007 10:59 PM

All times are GMT -5. The time now is 10:23 AM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC
« Back

Enter your email address:

Delivered by FeedBurner