fopedush

Thanks for all the replies. I will definitely try to bleed the system as soon as I get a chance. Temperatures have been around 5-10F during the day and -5F at night though, so it might be a bit before I have a chance to try it. I'll be sure to let everyone know whether or not it worked.

Bump? I had searched the forums before posting this and found nothing, but I just searched again using some different keywords and found this thread: http://us.lexusownersclub.com/forums/index...d&pid=25193 . From the looks of it this guy was having the exact same problem I am now having, but the replies are a little cryptic. Should I be looking into diagnosing the accumulator?

Hi everyone. I've got a '90 LS400 that I recently picked up at police auction for close to nothing. I've made a ton of repairs myself and it is now in nearly pristine condition, but one problem continues to elude me. Whenever it is cold outside, say between 15-30F, the traction control and ABS don't work. When I start the car, the 'TRAC OFF', 'ANTILOCK', and 'TRAC' lights come on and stay on for the duration that the car is running. During this period, of course, the trac and ABS are totally nonfunctional. Sometimes, after running the engine for 15-20 minutes and getting everything warmed up, I can kill the ignition and restart the car, and the two systems will work just fine, with none of the lights on the dash coming on. Here is an image of the dash while the problem is occurring : I've checked for diagnostic codes for both TRAC and ABS (as well as all the other systems), and there are none whatsoever. This car is a deathtrap in the snow without traction control and ABS, so I'm pretty desperate to figure out what the problem is here and fix it. Any idea where I should start? Any suggestions are welcome.