ClubLUser

iTrader: (1)

Couldn't do the test today, because Surprise battery is dead. Currently trying to get it towed to a toyota dealership.

Sasnuke

Dude...that has to suck! What's the nearest Toyota dealer? How far out there are you? Holy Cow!

So a little more info on this...the effected IS's must either have Blind Spot Monitor or Clearance Warning Sonar (or both) in order to be equipped with the Network Gateway ECU that causes this.
Dojoman is correct as there is an even newer ECU available. But if you have neither of these options, then the ECU is not causing your dead battery...which really isn't comforting either.

ClubLUser

iTrader: (1)

So currently its 100mA, i have disconnected every aftermarket item i have installed... back up camera, remote start, fog lights. Called lexus and they are not ok with me getting it towed to the closest toyota dealer. Nearest lexus dealer is 150km. still unplugging each fuse one at a time... so far nothing in the engine bay of fuses. I asked them if the battery was replaced before, they said it was once in 2015. i have work soon so we'll see where the day leads..

Sasnuke

Ok...so if you have a aftermarket Back-up camera then there is no way you have the BSM or Clearance Sonar.
The remote starter scares me a little...those things usually kill batteries when they go south, or just before they are about to stop working.

The TSB mentions to check the draw anywhere from 10 minutes to 2 hours after the vehicle is shut off.
Given that the battery is dead, you won't be able to do a proper draw test even if you follow all the steps...the battery needs to be full charged (or close to) in order to do the test accurately.
With a 100mA draw, definitely something is on...like a dome light or something.

ClubLUser

iTrader: (1)

Battery was tested at Total Battery to be good, put out ~750CCA. Put it on a intelligent charger last night, so its fully charged. Started doing the Parasitic test and it pulled about 90mA with my remote start completely disconnected... but when i pull the J/B LH-B fuse it drops to 5mA. Something to do with the security of the car, because out of reaction i plugged it back in, blew my multi meter fuse and the alarm went off. I'm going to try it again and contact a lexus dealer to see where i can go from here.

evident

Reasonable time to not expect battery to die?


I took my car to Lexus earlier this year to get the ECU replaced. However I didn't drive my car for 6 weeks. The car is dead. Is it unreasonable to think that it the battery should last this long? It's also garaged. Should I bother taking the car into lexus? it's still under warranty

ClubLUser

iTrader: (1)

Seems reasonable, i also believe the car self shut off at a certain voltage as to not kill the battery. My battery has "died" twice but really it was just at a low enough voltage it wont try to crank the engine. The battery was jumped and was tested great (pulled 750CCA).

evident

I just looked at my previous post about this issue. I got the issue fixed about a month before they issued that July 2016 TSB. and from the looks of it there seems to be a newer part number than before, so hopefully they will fix this issue for good, before my 2014 is out of warranty. Maybe i'll get a new battery out of it as well... just happy that i'm not in a rush right now.

Mrg02d

Going through this for the 3rd time now. This time, Roadside just sent a AAA flatbed to pick up the car and take it to the nearest dealer (157mi away). The last dealer that looked at it just laughed at me when I mentioned the ECU. He said that its impossible and that my battery is fine. I think that I thought I was nuts actually! He offered to wash the car as a consolation. I just grabbed a bunch of his cookies and left angrily (was the dealer that I bought the thing from too!)

-Matt

Htony

Checked charging system? Often times battery takes blame for something else.If you replace battery try different brand as well. If OEM battery watch the production batch number.

Baopee

I have bone stock 2014 IS350 F sport with blind spot monitor and cross traffic sensor, I just replaced the battery last Saturday again, and the one before was replaced on AUG 2016 dealer blame the failure on Texas weather. Now I have a jump starter in my trunk just in case.

Mrg02d

Yeah, I just was made to buy a new battery as well. Had to buy a Lexus battery since the car was stuck at the dealer, 157mi from home.

I'll be getting a nice jump starter as well. Tired of this crap from Lexus.

The350Girl

i have 2014 IS350, so the effected IS model for this Battery Drained issue is the one with BSM equipped ? how and why ?

nonopeno

Wanted to share my story:
I have a 2014 IS350 F-Sport AWD (no BSM, no sonar). About 2 years into the ownership, my battery started draining by itself. This is inconsistent - I am unable to find a pattern as to when it drains.

I brought my car to a Toronto dealership and they said I don't drive the car enough, which is true. But they also gave me BS and told me "I need to drive my car on the highway everyday, or else this battery drainage issue will continue". I believe I found CorradoMR2's post in this forum and was able to go to his dealership to get the issue fixed. The dealership mentioned they weren't able to reproduce the issue when they had my car, but that it was a known issue and would have no problems replacing it.

Mrg02d

I'm at a loss as to why some dealers just replace the ECU and others, like mine, throw me to the curb? Surely the dealers that replace the ECU make money off of Lexus, no? What would cause one dealer to just go for it and another not to? I'm incredibly dissatisfied with Lexus. My first Lexus and already looking at other brands.