Post Booster Replacement - ABS/VSC Lights with Codes

Joined
Oct 19, 2004
Messages
525
Location
Atlanta
So after this replacement, now I'm trying to get my ABS/VSC lights to turn off. Warning sound and brake light have stopped.
Booster assembly was done following the instructions posted by many. "Manual" flush then Techstream for all four corners to activate the ABS solenoids. After bleeidng with clear fluid and no air, LC brakes great. But I have the ABS and VSC lights that won't turn off nor will it clear them using Techstream.

I have the following:
C1223 - ABS Control System Malfunction
C1233 - Open/Short..Yaw Rate
C1244 - Open/Short...Decel Sensor
C1246 - Master Cylinder Pressure

I understand the C1223 is generic when anything in the ABS is not functioning downstream, so I'm guessing the C1246 is triggering this. Are there any troubleshooting procedures for any of these codes? Do they magically disappear after some driving? or have I done screwed something up?

The one thing I didn't do is drive on gravel as some have done to flex the ABS system but I figure that's what I was doing in TS for all four corners (4 seconds, resting, etc.) until all air and fluid ran clean.

Clearing DTCs in TS does nothing to these lights on the dash. They come on every time you start the car without pressing anything.

Any ideas?
 
Last edited:
Joined
Sep 9, 2016
Messages
2,073
Location
Odessa/Midland TX
I am sorry, I have no answer, but wanted to share what my cousin did to his 01 Montero (same setup as LC). He installed a new ABS motor and accumulator, bled all 4 lines at the PUMP (with key on) and it drives good! No codes and I rode it!
 
Joined
Oct 19, 2004
Messages
525
Location
Atlanta
Doing a Zero Point Calibration and Pedal Height Adjust (switch) and see if this clears the codes...
 
Joined
Feb 4, 2011
Messages
7
Location
Hawaii
I’m having the same issue. Replaced with a refurbished booster and now ABS light is on. Anybody have more info on how to clear this?
 
Joined
Oct 19, 2004
Messages
525
Location
Atlanta
Last edited:
Joined
Feb 4, 2011
Messages
7
Location
Hawaii
I also have this leftover. Any idea where this goes?

FA3DA0C7-11E5-475C-8FE6-2FF1DBA726E6.jpeg
 

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