I know this isn't a 4runner forum, but there's some pretty mechanically adept people on this board so I figured I'd ask.
I was driving my 2004 4runner last week when suddenly the VSC / VSC TRAC / ABS / BRAKE lights went off on the dash and some crazy siren started. Brake pedal became very difficult to press and stop the car. Figured it was the brake booster assembly and found a remanufactured motor and accumulator for $350 off the ebay and got that installed Friday along with a new seal.
Now it's been about 30 miles and the VSC / VSC TRAC lights are still on and I can hear the pump cycling on every time I press the brake pedal. I know it's normal for it to cycle on when starting the car and every few brakes, but this is happening every time I press the brake pedal. If I'm stopped at a light it might cycle on again after 20 seconds while holding the pedal down. Occasionally I hear it cycle on when the pedal is not depressed at all. No issues with braking power or anything like that, but I suspect that maybe the system isn't holding pressure as it should.
I don't know if this is a thing where I'm hyper aware of it and listening every time I hit the brakes or if it's normal. The manual even states: Brake System, Page 277: "You may hear a small sound in the engine compartment after the engine is started or brake pedal is depressed repeatedly. This is a pump pulsating sound of the brake system, and it is not a malfunction."
Am I just being paranoid or does this sound off to anyone else?