A couple of comments:
1) The problem with the Prius brakes are similar to a problem Ford had recently with the Fusion Hybrid sedan--a weird feeling on the brakes as it switches from engine braking to mechanical braking. Ford fixed the problem with a software upgrade to the hybrid drivetrain computer, and it appears Toyota will do the same.
2) Toyota may have to redesign their Engine Control Unit (ECU) computer so it cuts off the throttle during braking (which is standard practice on other modern automobiles with electronic throttle controls). If it cannot be implemented in the ECU software, that could mean millions of Toyotas will need new ECU modules--a cost that could run into several billion US dollars.
1) The problem with the Prius brakes are similar to a problem Ford had recently with the Fusion Hybrid sedan--a weird feeling on the brakes as it switches from engine braking to mechanical braking. Ford fixed the problem with a software upgrade to the hybrid drivetrain computer, and it appears Toyota will do the same.
2) Toyota may have to redesign their Engine Control Unit (ECU) computer so it cuts off the throttle during braking (which is standard practice on other modern automobiles with electronic throttle controls). If it cannot be implemented in the ECU software, that could mean millions of Toyotas will need new ECU modules--a cost that could run into several billion US dollars.