Hello,

I purchased my 2005 TL 6MT with Nav in January. I knew it had an aftermarket audio system installed at one time (amp wires are still there, tweeters up front have aftermarket grilles, etc). All was well for a while and then I started noticing some strange things...

-engine would feel sluggish/not as responsive as usual
-VSA and the VSA-off (triangle/exclamation point) lights would come on shortly after that
-then sometimes the tach, speedo and temp gauges would go down to 0
-trip computer would reset avg mph/mpg

sometimes after a few seconds the needles and trip computer would start working again (albeit the trip computer was reset except for total mileage and time) but the VSA and VSA-off would remain lit.

The needles and trip computer will do their dance multiple times. Turning the car off and back on again fixes it temporarily... sometimes for days/weeks, sometimes for just a few seconds.

The problem has gotten increasingly more frequent in recent weeks. I found this thread, which sounds identical to my issue. - https://acurazine.com/forums/3g-tl-audio-bluetooth-electronics-navigation-94/please-help-dvd-install-vsa-light-624800/

so my question is, where are the spots I should start checking for a bad ground? I understand under the driver seat and in the trunk near the navi unit are good places to start. Anyone else have some suggestions?

Not that this helps any, but here's a video of what happens right after I restart the car while moving after it's been doing it for a while. This was on my way in to work today. It didn't do it at all when I went to lunch 3 hours later.


Thanks!

 

Two grounding points I remember seeing:

Driver side underneath the seat:


Passenger side underneath the seat:

 

That's a start! Thank you!

 

That's it? Come on, AZ! I had higher hopes... =P

 

How is your battery condition and associated connections?

 

theres also grounding points under the dash left side . looks just like the above.

 

Battery seems fine, but on very cold mornings through the winter it felt like it was working a bit. I'll check the date of mfg on it and the connections. Thanks for the reply!

 

Thanks! I'll have to poke around there too. I remember seeing one down by the resonator box when I installed the intake on my 04. This car already has one on it, but that is another spot to check.

 

Yup theres one there too.

 

When you said under the dash left side, do you mean under the carpet, or up under the dash somewhere above the pedal assembly?

 

l behind vsa button

 

None of which sound like they are very easy to get to. I haven't had a chance to look yet, but any good grounding points in the trunk?

 

Same ground points are in the rear. 1 on each side when you take off the side covers.

 

It's 2021 and this forum is still useful!