ABS Service 02
by, 21-07-2011 at 11:19 PM (2502 Views)
As reported in ‘ABS Service 01’, three out of four solenoids on this NSX were stuck closed.
Good news (or bad news, from a certain point of view) is, unlike many other ABS issues, this won’t trigger the ABS warning light and it won't disable the ABS.
However, as they are stuck closed, they won’t be able to release the brake pressure and thus, no ABS control at all on the three out of four tyres.
Somewhat dangerous as there is no ABS warning light to tell the driver that the ABS is not working.
Tried several different methods to recover the three solenoids without any success.
So, during the test driving session and to/from the alignment place, exercised the ABS many times to flush the solenoids under vibration.
Managed to recover two faulty solenoids with the above method so just one left.
For the last faulty solenoid, used the back pressure flush method by activating the solenoid while operating the pump at higher pressure.
Finally, all four solenoids started to return the fluid to the reservoir.
As all three solenoids were stuck for many years, I am not 100% happy with one of the solenoids as it doesn’t close quick enough so will keep flushing all four of them every day until the owner collect his NSX.
As you heard from many owners, if you don’t flush your ABS modulator and solenoids at a certain interval, it will eventually trap some air and get leaky resulting in foamed fluid overflowing out of the reservoir like this.
Another ABS recovered.