Did some searching on this forum and came across several similar issue I encountered. Here's mine and what the prognosis is...For the past week, I had the ABS, VSC TRAC, VSC OFF and BRAKE lights along with the continuous beep come on as soon as I started the engine. It would only happen once or twice a day (not everyday though) and only last about 10 seconds and it would turn off. Never while driving. No issue with braking after the light/sound went off.
So, I got myself a $100 BlueDriver Bluetooth OBDII reader to get a scan on the issue. Never used one in my life and it was actually really simple to use and was able to pull couple codes..C1223 (ABS Control System Malfunction) and C1251(Pump Motor Circuit Malfunction). Hoping it was a simple issue, I did some things you guys have recommended trying:
1) Did the 40 brake pump to check the level and motor (it was fine)
2) Cleaned all 4 ABS sensors. I was lucky that it wasn't stuck and it was a simple task and didn't have to take off any wheels (It was dirty)
3) Checked the battery and for low voltage (it was fine)
4) Checked for brake fluid leaks at caliper/wheel area (no leak)
5) Clear codes and see if it comes back (it did come back)
At the end, the codes came back and the lights and beeps were still there. So, not to take anymore risk, I took it in to my independent shop in San Diego. They used the techstream and pulled the codes and they visually checked the master cylinder unit. They confirmed its the MC and showed some leak.
So, my 2001LC with 172K is getting a new MC assembly and control module as we speak. So, I guess I should be set for another 175K miles! Didn't want to deal with another problem with ABS so I didn't take any risk with used assembly or control module. The price is definitely steep and a bit depressing. This is the most expensive fix I have done to this LC. Still in a bit of a shock.
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