THAT ABS ACTUATOR BARKING NOISE

everyone. Have read a lot of threads on PC about the barking noise coming from the abs brake actuator.

I have tried comparing the noise, with a gen2, 08, and had discovered that, if one's abs pump is OK, that barking noise won't be there, or so often noticed.

But if its getting faulty, that barking noise comes on every time.

Here's a case study I had with a highlander hybrid 2006.

I recently rebuilt the battery, after it got flooded recently in Lagos.

Symptoms
1. No brakes, had to drive the car carefully, applying the park brake at every stop
2.All warning lights came on the instrument cluster. Abs, VSC, Brake light, CEL, slip indicator, etc.
3. Abs pump continually barks for more than 2sec(barks longer than necessary).
4. Scanned the car for codes, got C1253: pump relay....
5. Cleared the codes to see if it reappears. It cones back immediately the car is put in D, or R.
This tells me, its a hardcore code, that needs to be fixed.
6. The abs pump actuator had oil spills on it. I mean some kind of brake fluids on it.
7. A non hybrid tech wrongfully tried bleeding out air from the hydraulic system, but he ended up doing something worse.
Brake system became non active, and that's how I carefully drove the car to my shop.


What I have done:
1. Checked and replaced all the abs motor relays
2. Checked wiring harness from the engine hood fusebox to the actuator area, the wires were OK.
3. Bled the hydraulic system, using my vacuum pump.

There was a lot of water in the brake fluid, and grits.
I'm deciding to flush the entire brake system this week.

After bleeding the system, the brake application was restored; Brake light went off; check VSC only came on.

Scanned the car again, got the same C1253 code.
3. Concluded the abs pump actuator had FAILED or problematic internally.

What should I do next? I intend replacing the pump with a used one, and see how it performs.

What are your thoughts in this?
Please, I'm here to learn.

PS: After replacing the relays and partially bleeding the system, the braking feel was restored. But the problem is it keeps showing the C1253 code.

Check out the pictures uploaded.
You can see air bubkes in the vacuum pump tubing.


Dxta

 

I wasn't the one that did bled the brakes wrongly. Some dude, tried using the conventional car bleeding method on the rear wheels, before I came on the scene to rescue the car.

 

Bleeding the brakes isn't the problem right now.

The rear brakes are bled differently, using tech stream, and a vacuum pump, in my case. While the front, are bled conventionally, after removing the abs motor relays.