I already replaced abs actuator a year ago, but still have a problem, abs vsc brake lights and constant beep noise. Code c1252 c1256. The actuator is a salvage, but it wasn’t making any of the usual noises that indicate it’s going bad, it wasn’t running more than normal. This happened all of a sudden.
Define "wasn't running more than normal". C1252 is a code that's states " brake booster motor on time abnormally long". C1256 is accumulator pressure low. IF the pump motor power feed and ground circuits are good to the pump motor then the problem is most likely to be the accumulator assembly. See the diagnostic charts in the service manual. Having a capable scantool that can display brake systems pressures (such as Techstream) helps to confirm the source of the fault. Posted via the PriusChat mobile app.
Thanks for the reply. When I said “wasn’t running more than normal”, I was referring to the last time my actuator went bad. It starts to turn on more and more frequently as it goes bad. That didn’t happen this time, it was all of a sudden. I’ll check out the diagnostics and see if I can find anything. Thanks
