Any help would be appreciated to save me on unnecessary part replacements (ABS motor, VSA module, speed sensors, etc). First, I'm not sure if related, but the ABS/VSA malfunction began while I had problems with alternator ripple, until I finally replaced the alternator - that didn't fix the intermittent disabling of my VSA/ABS system with corresponding dummy lights in the dashboard though. So I ran the DTC 52,53 (my codes shown) VSA control unit/modulator troubleshooting guide in the repair manual to no avail - as fuses, continuity and voltage tested fine. Also, "motor stuck open DTC 52" or "motor stuck closed DTC 53" don't seem to make sense either as the ABS/VSA motor don't run continuously nor do they not run at all. Incidentally, the dummy lights disappear randomly and all systems go back to normal on it's own - until the next time it happens out of the blue (I could start the car or be driving down the road). Clearing the codes only help to reset the system until the next triggerpoint. Finally, so long as the ABS/VSA dummy lights aren't triggered, both the ABS/VSA work fine. Thanks for any advice.

 

Problem fixed. Solution: Replaced VSA modulator

 

VSA Modulator? How much did that set you back?