Event data recorder for Your Toyota Prius 4 Door Second Generation (2004-2009)

In order to be effective, the SRS  
airbags must deploy with tremen-  
dous speed. The rapid deployment  
of the SRS airbags makes the  
SRS airbags themselves potential  
sources of serious injury if an oc-  
cupant is too close to an airbag,  
or if an object or some part of his  
or her body has been placed be-  
tween the occupant and the airbag  
at the time of deployment. This is  
just one example of how the in-  
structions in Section 22 of this  
Owner’s Manual will help ensure  
proper use of the occupant re-  
straint systems, and increase the  
safety they can provide to you  
and your family in the event of an  
accident.  
Event data recorder  
Your vehicle has computers that  
monitor and control certain as-  
pects of your vehicle. These com-  
puters assist in driving and main-  
taining optimal  
vehicle perfor-  
mance. Besides storing data useful  
for troubleshooting, there is a sys-  
tem to record data in a crash or  
a near car crash event. This is  
called an Event Data Recorder  
(EDR).  
The SRS airbag sensor assembly  
contains the EDR. In a crash or a  
near car crash event, this device  
may record some or all of the fol-  
lowing information:  
Engine speed  
Toyota recommends you to read  
the provisions in Section 22 care-  
fully and refer to them as needed  
during your time of ownership of  
this vehicle.  
Whether the brake pedal was  
applied or not  
Vehicle speed  
To what extent the accelerator  
pedal was depressed  
Position of the transmission  
selector lever  
Whether the driver and front  
passenger wore the seat belts  
or not  
439  
Driver’s seat position  
Front passenger’s occupant  
classification  
440  
SRS airbag deployment data  
Toyota will not disclose the data  
recorded in an EDR to  
party except when:  
a
third  
SRS airbag system diagnostic  
data  
If your vehicle is equipped with a  
vehicle stability control (VSC) sys-  
tem, its Electronic Control Unit  
(ECU) may contain another EDR.  
There are a variety of driving situ-  
ations which include activating the  
VSC under which the VSC EDR  
will record certain information. The  
VSC EDR may record some or all  
of the following information:  
An agreement from the ve-  
hicle’s owner (or the leasing  
company for a leased vehicle)  
is obtained  
Officially requested by the po-  
lice or other authorities  
Used as a defence for Toyota  
in a law suit  
Ordered by the court  
However, if necessary Toyota will:  
Behavior of the vehicle  
Steering wheel angle  
Vehicle speed  
Use the data for research on  
Toyota vehicle safety perfor-  
mance  
Disclose the data to a third  
party for research purposes  
without disclosing details of  
the vehicle owner, and only  
when it is deemed necessary  
To what extent the accelerator  
pedal was depressed  
To what extent the brake ped-  
al was applied  
To what extent the ECU con-  
trolled the condition of the 4  
wheels  
Disclose  
summarized  
data  
cleared of vehicle identifica-  
tion information to a nonTo-  
yota organization for research  
purposes  
Vehicle stability control sys-  
tem diagnostic data  
The information above is intended  
to be used for the purpose of im-  
proving  
vehicle  
safety  
perfor-  
441  
mance. Unlike general data record-  
ers, the EDR does not record  
sound data such as conversation  
between passengers.