Well I supposed i'll glom onto this thread too. I've been fighting the VSC/ABS lights since Christmas.
The day after driving through some deepish snow I got the VSC off/ VSC Trac/ABS/Brake lights after driving a few minutes. Some quick googling found the loose gas gap fix so I hit a gas station, filled up and tightened cap. No change, but a few miles later my cruise control quit (cruise light flashed a few times) speedo/odo quit and CEL came on. At this point I'm 20 miles into a 130 mile drive home. Drove the rest of the way in this state.
I pulled the code and got a P0500 speed sensor. But a couple days later the speedo/odo started working and the code cleared. All the VSC/ABS/Brake lights still on. I borrowed my friends techstream setup about the time the lights all went away on their own. After a week of the lights coming on for about 5 mintues of my commute then going out before I could get the techstream on it I was finally able to get C0215 Rear Speed Sensor LH Circuit and C1223 ABS Control System Malfunction. At this point I'm able to reset zero point and everything goes away for a day or two. When the lights came back again, I decided to pull the sensor to clean it. There was some corrosion in the connector so I hit it with some DeoxIT and tried to get as much of the crust off as I could, put it back together and now the lights are on constantly and won't clear. I bought a cheapie sensor and put it in with no change.
If you're still with me, I put a meter on everything today since it was warm and have 12v in the harness with ign so there's not a break in that. I checked the sensors and the original has a higher resitance but still blips voltage when you wave metal past it. When I drive around logging the sensors, LH rear reads zero with either sensor (other 3 normal of course). Ever since I got the consistent LH Circuit problem I can't do a zero point calibration with the techstream.
I'm looking for something else to try before I break down and buy a sensor from Toyota or totally throw in the towel and let them fix.
