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06 Scion TC
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Discussion Starter · #1 ·
I'll give as much detail as possible. To start 06 Scion TC nothing upgraded. I'm NOT a mechanic but I can follow directions.

Was working on a different issue and while inside looking up info a torrential downpour came in while hood was open and fuse box lid was off before I realized it and shut the hood. Apprx. 5 hours later when lightning stopped, I removed battery and took out all the fuses I could get out. (relays, 30amps and up and disconnected the harness) Put fuses in rice and both the fuse box and fuses I used hair dryer, compressed air and let sit for 6 days. Out of those 6 days when there was no rain I left hood up in 90-100 degree sunshine with fuse box lid off.

so yesterday, went to start it and see what was happening and had zero power and broke the case to my key fob (my key is a Toyota key with the dot on it). After 24 hours found the power issue, prior people had a lose bolt with my battery cables. Found it, tightened it and power back. YAY! but...

Started right up and ran fine. checked lights, doors, blinkers etc. all worked except I couldn't get passenger window to go down from drivers side but did from passenger. Then if I locked the doors from door panel they would immediately unlock again. Car running fine this whole time. So I turned it off and started it again. Started up just fine BUT then it sputtered and died. Started again. Same thing. And a third time. Just tried it again an hour later and same thing. Sounds like too little or too much fuel but not sure. Doors lock and unlock now from door but only unlock from key fob. (I was having this problem with key fob for a few months) checked all the fuses.

I have tools, multimeter, and hundreds of schematics (that don't make sense. No Youtube videos for my vehicle) camera to take any photos needed, etc but no money which is why I was trying to fix my original problem since mechanics have ripped me off.
Could it be my key? (probably not but easy fix)
Guessing it's the water in the fuse box but no idea where to start looking. I also have no transportation now so I can't make a million runs to the store.
 

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06 Scion TC
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8 Posts
Discussion Starter · #3 ·
Car starts and stalls? Is that still happening? Any codes?
Okay, mechanic just left. Here is info I got.

All fuses, relays good.
Car starts but...
different intermittently,
sometimes starts then sputters and dies
sometimes starts and then revs and lowers over and over HOWEVER, gas pedal has ZERO response (also intermittent) he did check that connection and thought it was a bad connection because it ran great. Then when turned off and started again, same issues.
lights WERE working, now not
can not lower window from driver side

There are NO CODES because the it won't register. He tried at least 50 times, including manual settings trying to get ANY code and it doesn't read. He said the ECU which makes sense (in my computer but not mechanic brain) however, it's an 06 so the only places I can find an ECU are from companies with so-so reviews. I can NOT afford to take it to a dealer which is why I have an 06 in the first place. he said I was better off with a place I can send mine to to repair it so it's an exact match but can't find anyone who does that either. I've already lost so much money by mechanics, I don't know what to do.
 

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Not being able to communicate with the ECU is a major problem, that may resolve the other issues but that needs to be addressed first. If it’s getting power and ground and your DLC connector isn’t damaged then replace the ECU.
 

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06 Scion TC
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Discussion Starter · #5 ·
I'm testing my DCL connector now. Although, stating I'm not a mechanic, I don't know all the abbreviations. Had to look it up. Which is how I've spent the last 2 months.(after coming across that while trying to figure out if I can fix the ECU (since I actually build regular computers and I'm at a loss) I do have a couple loose-ish connections and found out how to fix that. However, I had to order a scanner because I have to check it first so waiting for it to arrive. If no problems there then yes, I agree I need an ECU. My point is, not sure where to actually get one from a reputable company.
 
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