How does the brake accumulator pump work on a Prius?
To apply the brake to a given wheel, the appropriate SLA solenoid is opened, which increases the pressure in that brake pipe – it’s closed again when the appropriate pressure is reached (measured by PFL, PRR, PFR, PRL). To release the brake, the SLR solenoid is opened, which returns the fluid to the reservoir.
Why is the brake actuator on my Toyota Prius not working?
THE ABS BRAKE ACTUATOR HAS FAILED. THIS A KNOWN ISSUE. TO RECTIFY THIS ISSUE WE WILL NEED TO REPLACE THE ABS BRAKE ACTUATOR, RESISTOR, AND FLUSH THE SYSTEM. TSB-0032-16 STATES THAT THIS IS A COMMON ISSUE CAUSED BY AN INTERNAL BRAKE FLUID LEAK IN THE BRAKE ACTUATOR. THE FRONT BRAKE PADS LOOK ALMOST NEW, AND THE ROTORS ARE IN GOOD SHAPE.
Do you need to replace the brake accumulator pump?
And if this doesn’t work, replace the accumulator pump. The TSB also says there is no impact on brake performance. Well, the bleed didn’t help so now the dealer says to replace the accumulator pump. However, its a big job. It involves taking the inverter off and other connectors to get at the pump.
How does the accumulator pump work on a car?
The pump runs whenever the accumulator pressure (measured by PACC) is lower than a programmed value. To apply the brake to a given wheel, the appropriate SLA solenoid is opened, which increases the pressure in that brake pipe – it’s closed again when the appropriate pressure is reached (measured by PFL, PRR, PFR, PRL).
When does the ratchety pump start on a Prius?
Discussion in ‘ Gen 2 Prius Main Forum ‘ started by Marvinh, Mar 21, 2009 . I have a ratchety / pump noise when I start from a cold start and sometime when I switch from ‘Park’ to ‘Drive’.
Is there a warranty on a Toyota Prius?
I reported to my dealer that my Prius very intermittently makes the noise described in the Toyota USA brake actuator TSB (BTW, the Canadian TSB is #2725). Although the noise didn’t occur when the technician checked the car, the service manager authorized replacing the actuator assembly under warranty.