Hey all,

So, started running into bugs in my 2014 LS. Tire pressure monitor would not show any values and sometimes not even respond (yellow icon on the dash sometimes), when listening to audio via AUX, it will sometimes show "Radio Off' and the clock, no matter what I do, once I shut of the car, it loses time, it is never correct. When I got the car, the clock was fine, always was accurate, so this is new.

I checked the battery in the car, it was the original battery from when the car was new(I checked histry). It was .5 lower than it should and according to what I read, that would cause these gremlins. The car was starting fine, and time was not easy, so I lived with it for like 2-3 weeks. No problems starting the car at any point.

I was Walmart for something for my wife, and they had a battery that is in range (looked up specs to make sure). I grabbed it put it in and drove it for 2-3 days and noticed no change, all the gremlins are there. I figured, cheap battery, better not trust it.

I went to AutoZone and grabbed a Duralast Gold ( BCI Group Size 27 810 CCA 27-DLG) battery, it was not the entry level battery in the shop. All with specs for the LS, some gremlins are gone but, clock is still never right, radio showing "Radio Off" still shows it's head.

Do I need a higher end battery than a $300 Duralast Gold? Or did a damage things by driving it for 2-3 weeks?

 

Ger error codes with Techstream first.

 

My 2013 had to have the clock replaced in 2013, it's a known failure. Smart to try a second battery, now that cause is eliminated. The radio might need a repair. It could be a poor connection at the fuse or even the battery terminals. Suggest you clean battery posts and terminals and confirm that terminal are tight enough that they won't move from moderate hand twisting pressure.

 

Agree with swfla. Your battery size (cca's) are more than needed and will work fine.

 

When I got the car, the clock was 100% accurare,I have had the car from the start of December

The battery terminals are tight, I am sure of it, and they are perfectly clear/clean. I made sure if it. I did not hand tighten them, I used tools to make sure they were very tight and they do not move at all. I will double check this tonight but, I am sure of it.

This not the first time I have changed a battery in a car.

If I connect techstream, what should I be looking for ?

It's an 810 CCA, what should it actually be ?

By the specs I looked up 810 CCA should be fine the car.

 

I don't think you need techstream, I would've just checked batt voltage after it sat for a couple of days.

The original battery type is group 27c 750 cca and 1010 ca.

This battery would go almost dead after 4 days of sitting and it's only 2 yrs old, it's been sitting out of the car now for 4 months and the soc is about 70%.
I have a mtp 24 interstate in the car now that holds the charge fine, I will get a group 27 soon just because they have more reserve.

 

Hi David, I have a saying "I'm never too old to make errors". I know you well enough from your posts to think highly of you.

 

It just occurred to me...the clock is interconnected with the display unit. You enter the screen to make clock adjustments. With that in mind, it makes sense (to me) that the display issue you have, is the source of the clock issue. I don't recall a similar issue posted here but.... Hoping you figure this out without having to send the head unit in for repair.

 

Thanks, that is the ONLY way to adjust to clock. If I set the clock, the time is right, till I shut off the car. I tried Auto set or manually, it does the same thing.

Is there battery backup anywhere on the car that could be keeping the time? Maybe when the battery was low, it killed the backup battery?

Right now, not sure if it's the Clock, or the radio not going to send it out on a maybe.

If it's the head unit, I am going to just start watching for one from a 2016+ as I might be able to use the full screen with it...

I never looked in Techstream for a clock setting, maybe there is a reset or something for the clock.... I'll have to spend some time this weekend on it.

Not sure if this relates to a 2014 but, on this thread...

Car Battery Ls460,08 Help - 07 - 16 Lexus LS460 / LS460L / LS600h - Lexus Owners Club of North America

"There are many systems on a LS460 that may need to be re- initialized upon battery replacement ."

So maybe Techstream has an answer..

 

Being a post from 2012, I'm not sure this applies either. I know there are posts about seats and windows not functioning after battery replacement, not sure of years though. I just clip a 9v to battery cables or use my battery charger. I think spending some time with TS is worth a shot. I like the idea of using a 2016 used system but not sure about compatibility issues with climate control system. ( no 2013+ on Ebay currently) Maybe compare repair price to used radio price first? Hopefully someone here can speak to compatibility from experience.

 

I keep an old dual core laptop in my garage with TechStream in my garage. I'll do some tests with it over the weekend. Crossing my fingers that there is a setting for the clock and to reset it...

 

Look for a bad ground. A bad ground can cause all sorts of problems.

 

2013 Model - I had same issue with clock. Tried adjusting to BST etc & it was always 5 mins late. It was only when I disconnected battery recharged even though it was starting the car that it corrected and has shown correct time since

 

Ok, so I checked the battery (voltage is good)..... I pulled off thermals, they were a little dirty but, nothing I would worry about. I sanded them down (both sides), so I could see them perfectly clean, reconnected, made sure they were very tight(with tools). No change.

I used TechSteam, I checked the Navigation system in it, and it said the clock was disconnected with a B code (forget exactly what the number was, B codes are factory codes). I cleared all the codes, re-stared the car and reconnected the codes didn't come back.

STILL the clock is not accurate. IT WAS PERFECT before the battery got low. ANY idea on how to fix this? I really do not want to dump a ton of cash into this with a guessing game. Is it the clock, or the radio, etc?

 

As you may or may not know, you can reset the clock manually to the correct time. Disconnecting and reconnecting the bat is going to screw up the time.