GoodRevs

Was a definite solution to this ever found?

01LEXPL

iTrader: (10)

Changing the battery did the trick for me.

check it: https://www.clublexus.com/forums/es3...f-the-day.html

GoodRevs

I did that almost as soon as I bought the car as the battery looked pretty old anyway, it didn't alleviate the flickering lights at all.

Perhaps someone else in this thread has noticed that their lights don't flicker until the engine is started, i.e. turning the key one click (activating lights, radio etc.) the lights don't flicker.

01LEXPL

iTrader: (10)

^ have the alternator checked, that would be the only other thing.

Ideally i would suggest going over as many grounds as you can see so that they aren't loose or frayed, or 'broke' off with time.

01ES300NYC

iTrader: (2)

i had the same problem. 2001 es300...voltage regulator in the alternator was going bad. replaced alternator with aftermarket 140amp alternator also added an optima yellow top and new terminals. running a 2200w amp for bass. fixxed the problem

QITPLEXUS

DALLISON - I am running into the exact same problem with my 2000 RX300. So I tried what you did by removing the A/F HTR fuse first and it solved the problem. Put it back, and the problem came back. Did the same thing with that Relay and just as with yours, the problem went away then came back when I put it back in. Tried cleaning the contacts.. everything you did.. new wires, alternator, battery, sanded ground connections. Nothing. Did you ever find the cause/fix? I am grateful, no beyond grateful for all the research you have done. There must be someone out there who has figured this out.. hopefully! If you have, would you please let me know? Thanks!

01ES300NYC

iTrader: (2)

you need to replace your alternator with a 100amp not the stock 80amp...
https://www.clublexus.com/forums/es3...e-applied.html

QITPLEXUS

Thanks. Already did that (100 AMP Alternator is installed) last week. No change.

01LEXPL

iTrader: (10)

^^ it still does it?!

QITPLEXUS

Indeed it still does. There is no question that DALLISON is on to something with the A/F HTR circuit. When that circuit is not operative the problem completely goes away. It's important to know that this car runs extremely strong and has been maticulously maintained. It starts like new - lights are bright everywhere otherwise. I am thinking there is a high resistance path somewhere in that A/F HTR circuit - perhaps since the day it was born. Thoughts anyone? Thanks!

01ES300NYC

iTrader: (2)

Damn that's crazy.... the alternator upgrade fixxed it for me... im gonna do some more research.....

01ES300NYC

iTrader: (2)

have u checked your ground connections? terminals? was the alternator used ,rebuilt, new, aftermarket? are u sure its a 100amp alternator?

01ES300NYC

iTrader: (2)

u should check up on the toyotanation.com forum... it seems that alot of models with the 1mzfe have this issue including the avalon...they saw the same results when removing the air fuel ratio sensor.. most saw that switching to the highlander 130amp alt fixxed thier problem...the 100 amp probly isn't strong enough either... i only heard that the 100 amp was a fix. i have a 140amp aftermarket alt installed. i did that 3 months ago when i was told by my mechanic that my voltage reg was bad.. i guess the higher output alt is what fixxed my problem.....

01ES300NYC

iTrader: (2)

if you can depending on how u got the alt, see if u can exchange it for the 130amp highlander alt...it actually cost a little less then the 100amp..

yeskay

01es300nyc:
can you provide some diagrams on the current ground cables location.

thanks