OFFER: document brake pause problem

If you think your brakes still have the "brake pause" problem after getting SSC-A0B, I have an accelerometer to loan you to document the problem:


The process is fairly simple:

• Send PM with contact information - this way I can mail the accelerometer. But it is very important that you are able to replicate the problem at will. If it is a rare event, this tool will be a royal pain to deal with and we won't get the necessary data.
• Once it arrives - on your next trip to where you can replicate the problem, follow the instructions and put it in your car as shown in the photo.
• Remove it from the car and e-mail me the data - I load the data into a spreadsheet and 'integrate' the acceleration to get the velocity profile.
• I'll e-mail back the spreadsheet with the velocity profile - use this as part of your complaint to Toyota/NHTSA e.t.c.

This is how the data looks when there is no problem:


Here is the data before SSC-A0B with the problem:

You'll notice the velocity after the first speed bump stays constant. Blowing up the first speed bump and 'brake pause:'

You'll notice the acceleration, the blue line, goes to zero during the brake pause. So looking at the velocity profile in this small interval:

You can see during the 'brake pause', the velocity stayed the same after the speed bump before normal braking returned. The pause was about 800 milliseconds.

If you honestly think the brakes are still not working, send me a PM and I'll loan you the accelerometer to test the brakes.

Understand that since I had SSC-A0B, I no longer have this pause. It is gone. Documentation is a two-way street, it can also show there is no braking issue.

Bob Wilson

 

We have the NHW11, 03 Prius, and ZVW30, 2010 Prius. I've tried to find a local NHW20 for regression testing but no luck.

Bob Wilson