Need '93 SC300 Traction Control bleeding proceedures
11-29-05, 12:39 PM
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Need '93 SC300 Traction Control bleeding proceedures
I need the step by step for bleeding the traction control system on my '93 SC300. Right after engine startup, I get a noise that sounds like a pump that is starving for fluid. Then when I start moving, it does it a couple of times more, and the TRAC light comes on. Also at night, when the lights are on, whatever is making that noise is making the headlights go dim for a second.
Any help would be greatly appreciated.
Steve.
Any help would be greatly appreciated.
Steve.
11-29-05, 03:16 PM
#3
Lexus Test Driver
Try to disconnecting the battery altogether and allowing the ECUs to reset. That may fix your problem, as I've read that it has for others in the past. You may have to wait a few days before everything is sorted out.
Other than that, I've read about a traction control ECU that will run you major amounts of money from Lexus.
There is procedure on CL for bleeding the Trac unit on an SC400, not sure how to do it for a 300 tho, being different engines and all.
Other than that, I've read about a traction control ECU that will run you major amounts of money from Lexus.
Originally Posted by nextlevelcoupe
i had this same exact problem and could not figure it out(at first). i would have to start the car over again to clear that trac light,but soon it got to a point when i actually "heard" the traction motor somewhat... it sounded like it was a pump making a sound like it wasn't getting enough fluid- sucking air or something(extremely faint noise)- i also "felt" it ever so slightly under my foot and then...the light would come back on again...it was quite frustrating trying to find the problem until my mechanic noticed that there was a canister close and under the master cylinder that regulates some sort of pressure for the traction control..attached to the canister is a high pressure hose that was worn out and leaking very slightly..not even enought to be noticed, but that seemed to clear the problem. also, i was told that if that unit went bad (an electronic part) it would have to be replaced and is very expensive!!
check for any and all leaks near that master cylinder, all hoses in that region- and in the meantime, i will try to find a pic under the hood and post up the unit i'm talking about...good luck!
check for any and all leaks near that master cylinder, all hoses in that region- and in the meantime, i will try to find a pic under the hood and post up the unit i'm talking about...good luck!
Originally Posted by ArmyofOne
You can bleed a trac system? 
im pretty sure they are electronic....
im pretty sure they are electronic....Last edited by np20412; 11-29-05 at 03:22 PM.
12-04-05, 11:24 AM
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I am changing the high pressure hose that goes from the brake res. to the traction accumulator. I just need the proceedure for bleeding the traction control system,, I cant get the trac pump to run to get all of the air out. Does anybody know how?
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