I did a hard reboot, now the car is all kinds of wonky???? help please

 

You will have to tell us what's wonky

 

it runs very rough, all kinds of faults come on dashboard. dsc not available. revs up and down. spits and sputters

 

I tried a second reboot... no change???? I only did the reboot because of some rough shifting and it seemed to be riding rougher....

 

You should probably back up a bit and explain what you mean by hard reboot and what initiated it.

Most likely we won't be much help without knowing the codes you're getting but start with some background and your definition of a hard reboot please.

 

I disconnected the negative battery cable from the battery and held it to the positive post of thebattery for 15 seconds per many threads on here to reset the modules to factory and allow new learning... it seemed to have went quite downhill..

 

it would seem as tho I have messed its mind up something fierce????

 

OK thanks. You said reboot which implied computer, and I saw you're rationale as we were posting at the same time.
I asked because a hard reset can be done with SDD and you can screw it up if you jostle the cable while it's happening but that doesn't apply here.

So you understand, a hard reset of the battery is simply to return the modules to their original state by draining any capacitors of power. It will not fix a problem, but it won't cause them either so your hard reset didn't make things worse. (And btw, disconnect both cables and hold them together for a couple of minutes in the future.)

The most common cause of the problems you're experiencing is a depleted battery.

If it's me, I will take the battery to the local auto parts store and have them load test it. That's the starting point.

You can test it yourself if you have two people and a voltmeter, but the auto store will check it for free.

Where are you in Minnesota? Are we neighbors?

 

sean w. im from Wabasha, mn. there were no issues with the car before. just some rough shifting, and the ride seemed a little rougher then before. now after the reboot , it is all messed up??? the battery tests just fine.

 

And just to be clear, you had no diagnostic equipment plugged into the OBD II post at the time you did the hard reset, correct?

 

nothing plugged into obdII correct

 

I would start with getting the codes as swapping parts is never a good idea and codes will narrow it down. Here are a few threads that will give you an idea but let's get the codes first.

https://www.jaguarforums.com/forum/x...e-help-178453/

https://www.jaguarforums.com/forum/x...-101236/page2/

https://www.jaguarforums.com/forum/x...ashing-173866/

Though TPS or throttle body can cause the problem, you can see the most of the time, poor ground or bad battery is causing the problem. Codes will help take the guesswork out of it.

 

the only code that comes up on the obd2 is a P2135 throttle motor code. this was just fine before also. I get park brake fault, dsc not available, on the dash readoutll

 

Probably need a new battery.

 

P2135 is an Accelerator Pedal Position Sensor fault which probably explains your acceleration/ idle issue. This sensor is located on the accelerator pedal. There are several tests for it, but the first thing to do is check the connection. Do you have a service manual?

 

Too far for you to drive up and hook up my SDD to her. How does the battery test fine? Did you load test it? Aside from P2135, everything points to battery. TPI or TB are possibilities but battery is where I would confirm beyond a doubt, followed by testing ground points which are notoriously weak on the X350, especially behind the headlights where the corrode and snap off like twigs just loosening the nut.

 

How do you know the battery is fine?
Does voltage stay above 12 volts when you crank?

 

yes paydase.. battery is just fine. load tested it. if I may backup . everything was cool with the kitty, till I did a reset by unhooking the battery. now its messed up... I cant imagine anything changed in the half hour I had the battery disconnected??

 

Next step would be checking the ground points, as Sean advised.
If they are poor, any rough engine vibrations may still worsen bad grounds

 

You're correct. A hard reset will not in and of itself, cause your problem.