Sin1UZFE

Ls400 1999

If there was one, what would be the checklist to look at for check vsc?

bradland

The Check VSC light on my 99 would always come on after disconnecting the battery or when the battery was about to die.

Sin1UZFE

When I bought it the battery was dead would not jump nor hold a charge. So I bought a new battery from Walmart was like $50. Think it's that?

bradland

?
When was this?

Sin1UZFE

August September 2018, been popping up and going away randomly. Sometimes check vsc is on upon startup then gone shortly after. Others it comes on maybe 10 20 minutes after driving. Sometimes never comes on in 2 hr drives. Checked the alternator as well as PE pump not leaking into it.

bradland

Hmmmm, that's random...
You might try cleaning the battery terminals sometimes they can surprise you.

Sin1UZFE

I did they are clean, maybe new cables?

Ill post a pic later, maybe they need to be cleaner lol

qewani1

Sin1UZFE

I dont know what that means

Sin1UZFE

LS400FAN

First of all Sin..I would purchase an OBD II diagnostic code scanner that you can plug in yourself right underneath and left of the steering wheel that will give you a code of why you're getting the VSC cel, or you can go to Autozone and they will do the scan free of charge, otherwise it's all guesswork. Btw, you can buy a pretty good scanner for about $50-$70 bucks. The VSC cel can be triggered by almost anything, its best to save time and money getting the code and go right to the source of the problem. Btw, that's exactly what your Lexus dealer would do., good luck.

Sin1UZFE

Only code it had was of a busted purge valve. CEL is not on when Check VSC is triggered.

basilpluss

Back when I would replace parts on my ls400 I would disconnect the battery and I think I remember the light coming on 1 or 2 times within a period of a few weeks. I have a snap-on scanner so I just cleared the light. But I would drive on over to an Autozone or Oriley's and have both the battery and the alternator checked (FREE SERVICE) because that looks like a Walmart battery and they are not known for selling the best quality batteries. And get the alternator checked because if you are leaking any power steering fluid the alternator does sit right below the pump and fluid might be leaking into the alternator causing a problem / or there is not enough charge from the alternator. The VSC light comes on for either an electrical issue, or there is an issue with the stability control itself. I would also honestly check the cables running from the terminals. While the terminal's themselves are clean I can still see that there was previously corrosion, the cable itself may have built up corrosion itself inside, like in the picture below.



Hope this helps you

Sin1UZFE

Battery and alternator were among the first things to be checked.

basilpluss

do you know what the output of the alternator was?