silos5

iTrader: (3)

HELLO!!

I have a problem with VSC light on the dash, a symbol with the car (sliding) comes on when I press gas, and brakes act weird: they work good, but when I´m braking and almost stopping, the pedal shakes and acts like an ABS (this happens only at about 5 mph speed), although I´m on absolutly dry surface.
Symbol with the car sliding (VSC) comes when I push gas, power gets cut. It doesnt happen all the time, mostly when I start driving from the full stop.
VCS light comes also. I tryed restarting it by disconnecting the battery and doint adjustment like its written in the manual. It helped, but not for long.

Didint have these problems before untill I did these things:
- I had to disconnect the batery
- I changed factory air susp to UAS. I didnt take the factory compressor fuse off yet.
- I changed many parts in the front suspension, I also took the front brake calipers off to get some parts changed.

When I press VSC OFF, car gets all the power, but the brakes still work wierd.

I searched for this and didnt find much.

PLEASE, HELP !!!

killsnake

Do you have any CEL's with the VSC? When you removed your suspension and brakes did you happen to kink any electrical wires?

silos5

iTrader: (3)

if CEL is Check Engune Light, then it never came on. As for wire, I was careful with that. I disconnected bolts from the knuckle so that the wire that runs there was free. Yes, I had disconnected the speed sensor.

by the way, the car is Ls400 UCF20, 1998

killsnake

Recheck connections, then look at sensor for any debris. Did you lower your vehicle or change the size of your wheels or tires? How are you on your brakes? you say brakes pulsate at 5 mph.

PureDrifter

iTrader: (10)

as weird as it sounds, check to make sure that the MAF is securely plugged in. then go back and find the ABS wheel sensor wire you damaged.

silos5

iTrader: (3)

When I took the sensor off, I covered the hole with a paper so dust doesnt get in. I did it on one side, may be other got dirty. I also noticed that in one hole there was some white thing (like some wax), in the other side there was nothing.

I didnt really lower my car. I have Universal Air now, but I drive at ~stock height. Wheels are stock 16´´. I did allighment last week, nothing really changed.

Yes, brake pedal shakes (just like ABS) at low speed, at about 5mph. At higher speeds it´s fine.

silos5

iTrader: (3)

I will check this MAF. Actually I had a car fully serviced (spark plugs, all filters and oils, alternator belt) just before I put UAS on the car. Maybe the machanic didnt put MAF correctly.

silos5

iTrader: (3)

I checked the MAF connector, it´s totally OK. I didnt open any screws because I´m afraid I will do some bad things there cleaning it.

I will check speed sensors tomorrow.

If anyone has any suggestions, let me know

billydpowe

iTrader: (1)

pull up the codes, my vsc light was my "oil control valve", cleaned it, no more VSC light.

killsnake

silos5, did your wheel sensors pass the test?

killsnake

How would a VSC light come on with OCV code? I read the pdf you included, but maybe I passed the VSC disengaging portion on the article. Any assistance would be helpful.............

billydpowe

iTrader: (1)

the code was p1349 (at the beginning of the article) MANY many things turn on the VSC light, weak battery, loose gas cap, low brake fluid, so pull up the code, quit guessing.

killsnake

Wait a minute are you talking about CHECK ENGINE LIGHT. VSC is a vehicle skid control.............. keep up the good work Billy.......

billydpowe

iTrader: (1)

yes... they were both on, and came on at the same time... and when I cleaned the ocv, both went out.. Lexus told me the VSC light is not only skid control, but any number of problems will activate it... sorry about the confusion, but VSC light covers several things...

silos5

iTrader: (3)

thanks guys for the info, but my CHECK ENGINE is not burning.
I just checked the speed sensors and they are fine, nothing is damaged.
I tryed driving and this sliding car light burned again, couldnt speed up fast, because it cuts the power, and brake pedal still shakes in the end of the stop.
VSC light wasnt burning now, because I reset it, but I think it will start to burn as I drive more.

I dont know what to do, I believe I´m going to take it to some Lexus specialized shop or dealer.

Any suggestions??