hi all, I'm having issue, my car battery keeps dying. I recently changed the alternator, starter thinking it was the issue but it was not. i also changed the battery twice and the battery keeps dieing. any clue here?

 

My gut tells me it’s either something in the system creating parasitic draw, or you’re having really bad luck with batteries. This thread has a pretty good discussion on computer systems that turned out to be creating parasitic draw:

https://www.clublexus.com/forums/gs-...50-2013-a.html

That said, I remember I one time needed to go back to the parts store twice in the same month because the batteries they sold me kept dying. Most mainstream stores sell rebuilt batteries, and sometimes, you’ll get a dud.

 

Welcome! I've come to notice that batteries by some of the most popular brands last 2+ years or sometimes can last up to 5yrs depending on many circumstances. When you say your battery keeps dying, what scenario do you mean specfically?

• Do you park the car for a few days or a week at a time between usage and you come back to a dead battery?
• Do you have any aftermarket systems installed like a dashcam, lighting, etc. that may be drawing from the battery?
• Are you having the battery load tested to see if its in good health?

@GS350ichiban is also correct to note there have been issues with parasitic draws on the battery that can be annoying and worth looking into as well.

 

slowly the battery is dieing after some time...I recently changed the battery and after some time it begins to slowly die...

 

@RDGS350 - It might very well be worthwhile to have the the Network Gateway ECU checked to see if your car has the one that needs to be replaced..


This is the TSB issued by Lexus: L-SB-0035-16 (TSB was issued July 8, 2016)

► TSB is attached to his post and bottom...

LEXUS TSB Subject Title ' Intermittent Battery Discharge'


Introduction:
Some 2013 – 2015 model year Lexus ES, GS, and IS vehicles may exhibit an intermittent
discharged battery occurring with no apparent source of discharge found. One possible cause
may be the Network Gateway Computer not properly going into sleep mode at key OFF. This can
result in excessive parasitic draw and a discharged battery condition. Follow the procedure in this
bulletin to identify and address this condition.

► This bulletin applies to vehicles equipped with the options and produced BEFORE the Production
Change Effective VINs shown below.

GS350 AWD
With Options Blind Spot Monitor or Lane Departure Alert
With VIN# BEFORE VIN: JTHCE1BL#E5028690

GS350 2WD
With Options Blind Spot Monitor or Lane Departure Alert
With VIN# BEFORE VIN: JTHBE1BL#E5044369


► The Fix is: R & R Network Gateway ECU with new ECU version P/N: 89100-30181

$137.53 Retail for the new version ECU and 1.2 hours labor to replace it.

► New Version Network Gateway ECU: P/N 89100-30181

► They are often available on eBay for about ½ price (removed from a wrecked car but like a ne one) - Just make sure it is the correct new part number.



► The Network Gateway ECU is 'plug and play' - no programming or special equipment is required to replace it...

According to our 'take-it-apart and put-it-back-together' expert @eddie420 - It's REALLY easy to access the Network Gateway ECU. Basically take out 5 screws, remove glovebox, tada! The Network Gateway ECU is sitting right there. It's the thing that has the bright orange label on it.

 

Ive changed it and still have the problem...

 

@RDGS350 - Do you have an aftermarket dash cam? Do you have a seatbelt that remains buckled? Do you have anything that remains plugged into the OBD port?

 

no aftermarkets and nothing plugged in...this is a headache. I went through 5 batteries and changed my alternator, starter and installed a network gateway ECU

 

Anybody know where the immobilizer is located?

 

Deep within!

The advice in the last post of THIS thread from a fellow New Yorker from years ago is probably the best advice you'll get!

 

What brand batteries are you using?

 

What year and model GS? How is it not starting? How long sitting then no start?

Also where did you get the Alternator from? What made you think the Alternator was not charging correctly?

 

@Mangsailor I'm using Die Hard Gold.

 

@jgscott 2013 gs 350 awd...After i start and drive for 20 minutes and let it sit for like 10mins, it wont start after.

I got my alternator from Lexus dealership.(my so called mechanic said it was the alternator)

 

It sounds like heat soaking may be affecting a broken armature coil winding inside the starter. I think you'll need to replace the starter.

Unfortunately, you probably didn't have to replace the alternator. I can't imagine why anyone thought the alternator needed to be replaced...