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Brake bleeding complete. I used around about 50oz DOT 3 brake fluid. No issues bleeding the brakes using Techstream. Actuator pump doesn't...
Removing the original resistor, and installing the new resistor was easy. 5 minutes. Here's a picture of my original resistor. Note this...
Toyota sends out a new resistor, supposedly matched to the motor in the new brake actuator. My resistor is labeled 239.4 mOhm, or 0.239 Ohms. So...
I ohm tested the brand new brake actuator terminals, from pins 1 and 2 (BM2 and BM1) to pin 33 (MTT), and again read 0.5 Kohm, or 500 ohms....
Hi. Good to know. Did swapping out those accumulators fix a faulty brake actuator for you? If so, I'll hang onto my accumulator. Just in case... I...
Here's a couple pics of the motor. It looks to me as though both the motor and the accumulator could be swapped out from a used actuator, if one...
Accumulator simply unscrews from the aluminum valve body, using the 18mm nut on the end cap. The accumulator is heavy, to contain high pressure...
Having trouble getting the valve body cover removed. I might need to remove the accumulator first. I see a warning notice on the accumulator,...
I tested the electrical pins for ohms resistance, following the inspection procedure for the brake actuator assembly, from the 2006 Repair Manual....
I think the new actuator comes with a new resistor, that's installed way up under the driver's side dash. Anyone replace that resistor before?...
I'll probably tear the existing unit apart, just for kicks. I'll test the electrical connections for ohm resistance compared to Repair Manual...
After further research, I've ordered a new brake actuator from a Toyota dealer. With the information gleaned from this forum, it was clear my pump...
Does the rebuilding primarily involve replacing seals in the accumulator? I'm researching the Forum now. Quite a number of brake actuator...
Thanks again. That pretty much confirms it's the brake accumulator pump. Between the 2 minutes of continued power to the brake system after...
I just drove the Prius for a short 2 1/2 mile round trip. What I've been hearing continued to cycle even after I've shut the car/power button...
Good to know. Thanks. I'm a novice with this 2009 Prius.
Thanks for responding. As I stated in my prior post, it seems my Prius has always made some pump cycling sounds with the ignition ON. I probably...
Thanks for replies! I suspect I'm hearing the pump cycle. My problem is, I haven't owned and used the vehicle a terrible lot, so the pump cycling...
My Gen 2, 2009 Prius, 74,000 miles, has thrown the C1256-143 and C1391-591 codes. I cleared the codes, but expect them to return again after I...
Prior to separating all my modules, and with the orange HV battery disconnect unplugged, I had 62.4 V leakage from the positive main relay...
