Event Data Recorder - Reference Document
`
`An Event Data Recorder (EDR) is a part ofthe Supplemental Restraint System (SRS) ECU that records data for
`
`some types of collision events for future safety research or analysis. The EDR will record data when the vehicle
`
`experiences a rapid change in speed that exceeds a specified threshold. The threshold to start recording is
`
`above changes in speeds that are considered normal driving use. For example, stopping hard with the brakes
`
`would not cause a recording, but hitting a curb may. EDRs were installed on Toyota/Lexus/Scion vehicles
`
`because they have the capability to serve several purposes, such as assisting in vehicle development, quality
`
`control and/or safety research. An EDR is also helpful in determining the circumstances that caused an airbag
`
`to be deployed or not deployed.
`
`EDR Generations
`
`Starting with the 2001 Lexus LS400, EDRs were incorporated into to all Toyota, Lexus and Scion vehicles by
`
`2007. SRS ECUs with EDRs were typically installed at full model change years, which generally occur every 4 to
`
`6 years, depending on the model. The chart below outlines the three generations of EDRs installed on Toyota,
`Lexus, and Scion vehicles and what each EDR generation is capable of recording.
`01MY
`OZMY
`03MY
`04MY
`05MY
`06MY
`
`Gen 1
`
`Gen 2
`
`Gen 3
`
`
`
`Frontal
`Roll Over
`
`
`
`
`
`
`Current EDR
`
`Frontal
`
`Rollover
`
`Note: MY stands for model year
`
`Side Impact
`
`Multiple Events
`
`Post-Crash & Pre-Crash data
`
`Post-Crash Data - All vehicles equipped with an EDR will record post-crash data
`
`If an impact occurs that has exceeded the rapid change in speed threshold, the EDR system will begin to record
`
`data for varying lengths of time depending on the parameters it is capable of recording. Figure 1 shows a
`
`collision ’trigger’ and the data sampling rate recorded in the EDR.
`
`Figure 1
`
`Post-crash data
`
`
`
`O
`|
`203 {ms}
`
`"’62— 5252 Wayne :lfie'ani 3552:] on EDP. '22:": '1; 25:35:: 125
`
`Time’
`
`Collision trigger
`
`..
`
`Sampling rate
`
`OWNER EX. 2046, page 1
`
`Page | 1
`
`

`

`Pre-Crash Data - Not all models have an EDR capable of recording pre-crash data
`
`As explained in the Post-crash section, the EDR System begins recording data when an impact exceeds the
`
`rapid change in speed threshold. On certain models, the EDR will also record about 5 seconds of data that took
`
`place before the impact. Figure 2 shows the sampling rate of Pre-Crash data is different than Post-Crash data.
`
`Figure 2
`
`Pre-crash data
`
`Post-crash data
`
`'k
`
`0
`
`'k
`
`..
`
`O
`
`O
`Samplingrata
`
`_
`Sampling:1sec.
`I.
`
`.
`.
`Time*
`l
`l
`l
`l
`l
`.
`|
`2C0(ma}
`
`—25
`—45
`—35
`—55
`'Time — Scale is different for Pre—Crash and Post—Crash
`
`-15 Collisiontrigger
`
`Post Crash & Pre-Crash Applicability Chart
`
`The chart below provides EDR capability of each model and the corresponding model year (MY) it was built.
`
`Vehicles and the corresponding year that have a yellow bar are equipped with EDR that have the ability to
`
`record post-crash data only. Vehicles and the corresponding year that have a red bar, are equipped with EDRs
`
`capable of pre & post-crash data recording.
`
`lPost-crash data only
`
`I Pre- & Post-crash data
`
`
`
`
`
`
`
`End 3f Pro 1: :tier
`
`
`
`
`Toyo ta
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`
`
`
`
`
`
`
`
`
`
`
`SCION
`
`OWNER EX. 2046, page 2
`
`Page | 2
`
`

`

`Type A and Type B EDR Reports
`
`There are two types of EDR data displays: Type A and Type B. The type of display depends on the EDR and
`
`cannot be switched. The same information is displayed on Type A & Type B, but you will notice a difference in
`
`appearance.
`
`
`
`
`
`Type A — Note: This is just an example report. Your EDR information may look different.
`READOUT TOOL REPORT
` Event Data
`
`
`
`INVESTIGATOR Me
`
`INVESTIGATION DATE D6l30l201fl .
`ACCIDENT DATE
`0660:2010
`
`
`VEHICLE
`GS
`
`MODEL YEAR
`2005
`Tool Version(download) Men 4 1 D
`a
`VIN NUMBER
`saossoaaoaaossoao
`
`Tool Version(display)
`her 1 4 1 0 -
`Data Table
`
`Data Name
`Data
`
`
`ECU Number
`89170-30680’afi:}
`
`NewPage
`2 Page
`
`Freeze Signal
`Freeze
`Deployment Time
`12 ms
`
`Deployment Slage Passenger Not Fired
`Deployment Slage Driver
`Hi —@
`
`
`
`
`
`
`
`
`
`Page 1
`
`Event Data
`
`1.
`
`2
`
`Investigation date - image date
`
`Investigator -
`
`image tool operator
`
`3. Accident date- collision date (if known)
`4. Vehicle - vehicle model
`
`5 Model year - model year of vehicle
`6
`VIN Number— Vehicle Identification Number of the vehicle
`
`At the time of data retrieval, all ofthe above information is manually entered into the report by the tool
`
`operator. This information is NOT stored or pulled from the EDR.
`
`7. Tool Version (download)- software version used in tool when performing EDR image
`
`8. Tool Version(disp/ay)- software version being used to display EDR image
`
`Data Table
`
`9. ECU number - Electronic Control Unit part number
`
`10. New Page — most recent recorded page number among frontal pages
`
`11. Freeze Signal- an airbag fire signal will ’freeze’ data so that it cannot be overwritten
`
`12. Deployment Time — time from the recording trigger to an airbag fire signal
`
`13. Deployment Stage Driver— level of deployment for multistage airbags
`
`14. Deployment Stage Passenger — level of deployment for multistage airbags
`
`OWNER EX. 2046, page 3
`
`Page | 3
`
`

`

`Pre & Post Crash Data
`
`READOUT TOOL REPORT
`Gran
`Data
`INVES'I'IGAHGH DATE 2832.231
`IWESTIGATOR
`
`I‘
`IDENT DKTE
`'
`r“ ‘
`Hm 5m RECEMEO
`HICLE
`WDEL YEAR
`N NUMBER
`
`'
`
`
`
`
`
`
` 9
`
`BE" 3W?" 3305 DIN? D]
`
`Hall Gwlth S‘TZIUS PBSSE1"EI' JFEEIBZ!
`IOIHJDEI'I Bataan-1 Passer-3.1! Jr‘oxuaej
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`
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`@
`Pre-Crash Data
`\@
`as
`{"9“}
`
`
`
`
`
`Fest-Crash Data
`11.3
`(”PM
`
`25.0
`
`2&0
`
`15.0
`
`km
`2am
`
`,
`
`EnghE
`E91
`
`
`OFF
`«5.0
`
`Pre-Crash Data
`
`
`
`Graph Data
`
`1. Latest/Frozen —Page of most recent data
`
`2. Freeze Signal - an airbag fire signal will ’freeze’ data so that it cannot be overwritten
`3. Record Status - indicates whether data was recorded
`
`OWNER EX. 2046, page 4
`
`Page | 4
`
`

`

`Individual Data
`
`4. Time from Previous Event- time from the previous event trigger
`
`5
`
`Time from Last PreCrash Data- time from last full second record
`
`6. Pre-crash Data Flag- indicates if pre-crash information has been recorded or not
`
`7. Shift Position- transmission gear setting
`
`8 Seat Position Driver- driver’s seat position (FW — forward, RW - rearward)
`9 Belt Switch Status Driver— seat belt usage at time of impact
`
`10. Belt Switch Status Passenger- seat belt usage at time of impact
`
`11. Occupant Detection Passenger- passenger type as determined by the system
`
`12. PAB Manual Cut Off (N/A) — the status of the passenger airbag cutoff switch (if equipped)
`13. Ignition Cycles- number of ignition cycles after airbag system detected trouble condition
`
`14. Lamp On term —time that airbag lamp has been on
`
`15. Diag Code- displays airbag diagnostic system trouble code numbers
`
`16. Event Counter- the number of events and the order the system has recorded
`
`17. Writing Flag — indicates whether all the input data was transferred to the permanent EDR memory
`
`Pre-Crash Data
`
`Pre Crash Data- if the vehicle is equipped with pre-crash capability, four charts are generated
`
`18. Speed— indicates the vehicle speed at one second intervals. The last recording is at the time of the
`
`impact, between -1.0 and 0 seconds. The maximum recordable speed is between 75 and 78 mph. lfthe
`
`vehicle speed is greater than the maximum recordable speed, the chart will show between 75 and 78
`
`mph.
`19. Engine- indicates the engine speed in 400 rpm increments and is recorded in the same sequence as the
`
`vehicle speed
`
`20. Accelerator— indicates the accelerator pedal application.
`also recorded
`
`In some models, sensor voltage reading is
`
`21. Brake- indicates whether the brake lamp switch has been activated or not
`
`Post-Crash Data
`
`22. Vel Chg- this shows the longitudinal velocity (speed) change of the vehicle from the trigger event. The
`
`data is positive for deceleration (such as a frontal crash) and negative for acceleration (such as a rear
`
`impact). This data is taken where the airbag center sensor assembly ECU is located. If it is determined
`that there is the onset of a severe frontal collision, power is routed to the seatbelt pretensioners and
`
`the frontal airbags to deploy them. A small triangle indicates when the airbag deployment signal was
`sent.
`
`Some models may also display the following data (not displayed in this document)
`
`Side Crash Data
`
`1.
`
`B pillar —there is a sensor located in the pillar near the driver’s or front passenger’s shoulder, that
`reacts to lateral (sideways) forces. The data shows the change in speed ofthe vehicle at that point.
`2. C Pillar —there is a side sensor located in the pillar near the rear seat that reacts like the B pillar
`sensor.
`
`3. Floor sensor— there is a lateral sensor that is part of the airbag center sensor assembly. lt reacts to
`
`lateral impacts and analyzes data from the pillar sensors and safing sensor. If it is determined that
`
`there is an onset of a severe side impact, power is sent to the side curtain shield airbag and/or the
`torso bag to deploy them.
`Rollover data
`
`1. Rollover angle-indicates the sideways angle of the vehicle relative to the horizontal
`2. Rollover rate-indicates amount of lateral Gs
`
`OWNER EX. 2046, page 5
`
`Page | 5
`
`

`

`Type B - Note: This is just an example report. Your EDR report information may look different.
`
`
`
`
`GD
`Speedlmph)
`50 P.-—
`40
`3°3
`‘0
`w
`o
`
`
`.
`Tmem
`
`_5
`_4
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`_1
`7
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`
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`
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`
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`
`
`_
`_
`-7
`_
`
`Trmets)
`5
`4
`3
`‘
`1 i
`0
`
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`
`
`Timetsi
`—5
`-4
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`—2
`-1
`I
`0
`
`Engineirpml
`
`on
`
`FULL
`MIDDLE
`OFF
`6000
`5000
`4000
`3000
`2000
`1000
`
`E]
`
`Latest Pre—C rash Page.0
`RecordSIatus : Recorde-
`User Data
`RECORDER
`investigation [Me
`.
`.
`,
`mestlgator
`E IC 9
`Cciid‘em Date
`ModelVear
`W Numbe,____—I
`Tool Version(displayi
`Tool Version(download] ———@
`ECU No —@\@
`.
`COMMTYPEfifl
`/@
`System Information
`Page No.0f Latest PreCrash Data
`Time from Previous PreCrash TRC Event—.6]
`Freeze Signal ”a
`AB Deployment Flag‘E
`Diag
`Diag Code
`
`EDR
`04 23 2010
`ABC
`7
`I
`:4 23 e010
`2010
`381a3l38138138133
`Ver.1.4.l ,0
`Veri .41 .0
`60630
`CAN
`Pageo
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`
`Freeze
`CSAforDriver
`0
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`0
`0
`0
`0
`o
`o
`0
`(Names)
`Olmin.)
`FinlshedWriting
`
`0
`0
`0
`
`Ignition Cycle
`:0
`.
`.
`Lamp on Term,’-‘@
`Writing Flag for Diag __——@
`Occupant
`Belted
`Belt Switch Status Driver‘P-“QE
`Belted
`Belt Switch Status Passenge
`AMSD
`Occupant Detection~®
`(N A)
`SeatPositioniN'Ai _.@
`Won—e1
`FAB Manuai cm offtN Ai*@ (N A)
`R O (SA—Manual (”I 0”
`é]
`OFF
`Writing Flag for PreCrash Occupant
`Finishedwnting
`
`
`
`
`
`
`D
`75
`PreCrash Data
`s
`d
`
`74
`
`73
`
`47 9
`"
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`5::
`i’”.
`FULL
`’
`‘
`“E mm
`4400
`’
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`"9'“
`Time from Last PreCrash Data
`
`5” a
`""
`f:
`FULL
`’
`"
`4300
`
`54 _’
`”
`5::
`OFF
`'
`4300
`400(msl
`
`7:
`
`46 0
`'
`0°71
`OFF
`‘
`2800
`
`1s s
`‘ ‘
`:3;
`OFF
`'
`1700
`‘
`
`71
`
`Timets)
`
`0
`
`as 5
`[mp
`’
`’
`OFF
`[
`'
`800:
`
`'pm
`
`m
`
`1
`
`
`
`Latest Pre-Crash Page.0
`1.
`
`RecordStatus- Displays if data has been recorded
`
`User Data
`
`2. RECORDER — type of recording device
`
`Investigation date- image date
`
`Investigator -
`
`image tool operator
`
`Accident date- collision date (if known)
`Vehic/e- vehicle model
`
`Model year - model year of vehicle
`VIN Number— Vehicle Identification Number of the vehicle
`
`3 4
`
`.
`
`5.
`
`6 7
`
`8
`
`At the time of data retrieval, the information for lines 2 through 7 are manually entered into the report by
`
`the tool operator. This information is NOT stored or imaged from the EDR.
`
`9. Too/ Version (download) — software version used in tool when performing EDR image
`
`10. Too/ Version(disp/ay) — software version being used to display EDR image
`
`11. ECU no - Electronic Control Unit part number
`12. COMMTYPE— EDR communication type
`
`System Information
`
`13. Page No. of Latest PreCrash Data- Page number of most recent Pre-Crash Data
`
`14. Time from Previous PreCrash TRG Event- time from a most recent recording
`
`OWNER EX. 2046, page 6
`
`Page | 6
`
`

`

`15
`
`16
`
`Diag
`17
`
`18
`
`19
`
`20
`
`. Freeze Signal- an airbag fire signal will ’freeze’ data so that it cannot be overwritten
`
`. AB Deployment Flag- indicates which airbags have deployed
`
`. Diag Code- displays airbag diagnostic system trouble code numbers
`
`. Ignition Cycles- number of ignition cycles after airbag system detected trouble condition
`
`. Lamp On term — indicates time that airbag lamp has been on
`
`. Writing Flag for Diag —indicates whether during the event, diag code data, ignition cycles and lamp on
`
`term information was transferred to the permanent EDR memory
`
`Occupant
`21
`
`. Belt Switch Status Driver— seat belt usage at time of impact
`
`22
`
`. Belt Switch Status Passenger- seat belt usage at time of impact
`
`. Occupant Detection - passenger type as determined by the system
`24.
`
`23
`
`25.
`
`26.
`
`27.
`
`28.
`
`Seat Position(N/A) — position of the driver’s seat at impact
`Shift Position- transmission gear setting
`
`PAB Manual Cut Off (N/A) — status ofthe passenger airbag cutoff switch (if equipped)
`
`R/O CSA- Manual Cut Off- status of the rollover curtain shield airbag manual cutoff switch at impact (if
`equipped)
`
`Writing Flag for PreCrash/Occupant — indicates whether the data during the impact was transferred to
`the permanent EDR memory
`
`PreCrash Data
`
`29
`
`30
`
`31
`
`. Speed— indicates the vehicle speed at one second intervals. The last recording is at the time ofthe
`
`impact, between -1.0 and 0 seconds. The maximum recordable speed is between 75 and 78 mph. If the
`
`vehicle speed is greater than the maximum recordable speed, the chart will show between 75 and 78
`
`mph.
`
`. Brake- indicates whether the brake lamp switch has been activated
`
`. Accelerator(V)— indicates the accelerator pedal application.
`also recorded
`
`In some models, sensor voltage reading is
`
`32.
`
`33.
`
`Engine (rpm)- indicates the engine speed in 400 rpm increments and is recorded in the same sequence
`
`as the vehicle speed
`
`Timefrom Last PreCrash Data- indicates the time between the last precrash data and event trigger
`
`Note:
`
`Some reports may have data in another PreCrash page titled ”Next Most Recent Pre-Crash
`
`Page.l” This data precedes information from ”Latest Pre-Crash Page.0”.
`
`OWNER EX. 2046, page 7
`
`Page | 7
`
`

`

`Frontal Crash — Post Crash
`
`
`
`PostCrash DatalVel Chglovtmph)
`E]
`
`5 D
`
`1'30
`
`1 50
`
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`
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`”“03“ Data‘“' Chg'thh'
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`20
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`40
`0,5
`30
`0.4
`50
`0,4
`50
`0,5
`70
`3,6
`50
`0,5
`90
`0.4
`100
`0,4
`l 10
`0,5
`120
`0,6
`1 3-0
`0.6
`140
`0,6
`150
`0,5
`150
`0,4
`17-0
`9,1
`150
`5374
`ISO
`0,4
`10-0
`
`
`Frontal Crash Pageo
`
`RecordSIatus : Recorded
`User Data
`RECORDER
`Investigation Date
`Investigator
`ACcident Date
`Vehicle
`Model‘lear
`VIN Number
`Tool Versionldovmloadl
`Tool Versionldisplay)
`ECU No
`COMMTVPE
`
`Frontal Crash PageO
`
`EDR
`04 23 201-3
`ABC
`04 23 201-3
`Cl
`2010
`38138135138138138
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`
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`
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`
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`
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`
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`Writing Flag foer
`TRG Counter
`3
`5
`'
`0.
`Previous E‘.‘ent._4.
`Time from PreCrash TRG
`Linked PreC rash Data PageN/E]
`Frontal AB Deploymen: Time
`PretenSloner Deployment Time
`Deployment Stage Dru-er———@
`Writing Flag for Frontal Crash
`Deployment Stage Passenger-E
`\@
`
`0.9[mpl‘l]
`FinlshedWriting
`lltlmesl
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`Slims)
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`Normal
`NotFired
`Finlsl‘ledWriling
`NotFired
`
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`
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`
`
`20-3
`
`
`
`Frontal Crash Page.0
`1.
`
`Max deltaVX- Maximum change in longitudinal speed
`
`2.
`
`PWNP‘P‘PP"
`
`Writing Flag for GX— indicates whether the data during the impact was transferred to the permanent
`
`EDR memory
`
`TRG Counter— number of EDR event triggers
`
`Previous Event- type of previous event
`
`Linked PreCrash Data Page No.- page number of linked data
`
`Time from PreCrash TRG- amount oftime from PreCrash trigger to start of delta V calculation
`
`Fronta/AB Deployment Time- Amount of time from event trigger to airbag deployment
`
`Pretensioner Deployment Time- amount of time from event trigger to pretensioner deployment
`
`Deployment Stage Driver- level of deployment for multistage airbags
`
`. Deployment Stage Passenger- level ofdeployment for multistage airbags
`11. Writing Flag for Frontal Crash- indicates whether the data during the impact was written to the
`
`permanent EDR memory
`
`Frontal Post Crash Data (Vel Chg) Chart
`12. PostCrash Data (Vel Chg) AV(mph)—change in vehicle longitudinal speed in mph over milliseconds
`
`Note: Some reports may have data in a page titled ”Frontal Crash Page.l" This data is from a second
`
`frontal impact event that was above the EDR threshold.
`
`OWNER EX. 2046, page 8
`
`Page | 8
`
`

`

`
`
`
`
`-
`7:
`
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`
`Side Crash — Post Crash = Only displayed if EDR is capable of recording Side Crash events
`.
`4
`3 Pillar GyAVtmph)
`Side Crash Pdge.0
`3
`RecordStatus : Recorded
`
`2 \@1
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`
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`RECORDER
`5 c Pillar CyAVEmphl
`lnvestigation Date
`lnvestigator
`4
`Accident Date
`2
`
`EDR
`04 23 2010
`ABC
`04 23 2010
`
`Vehicle
`”we've"
`VlN Number
`Tool Versionldownloadl
`Tool Versionldisplayl
`ECU No
`
`COMMTYPE
`Side Crash Pagefl
`Time from TRG to initial 6
`
`Cx
`20”
`35135135135135135
`Ver.1.4.1,o
`Ver.1.-1.1,0
`60630
`
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`llmsl
`
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`a
`Linked PreCrash Data Pagw Pagefl
`E
`Time from Pre Crash TRG 4 497(msi
`“
`\
`Deployment TimeiB>Pillari
`NotFired
`Deployment TimeiC-Pillar!
`11(ms‘r L.
`.
`i
`.
`Deployment Slde
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`
`Writing Flag for Side Crashfl
`
`FinishedWriling
`
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`
`Post Crash DatalVel Chg)
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`c Pillar Gylmphl
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`’23
`0.0
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`0.0
`0:3
`0.0
`'15
`0.0
`— ,
`—-
`.2
`—7
`"3'0
`0'0
`‘H
`0 0
`3 3
`0
`0‘0
`“3.2
`0.1
`‘5
`0.0
`~05
`0.?
`l
`0.3
`-1.9
`1.4
`9
`1
`3
`-i 3
`.3 5
`5
`o 5
`-2.1
`2.5
`13
`1.1
`~13
`2.5
`17
`5.0
`~1.6
`2.5
`21
`3.1
`71.6
`2.7
`25
`1.4
`-1.8
`3.4
`29
`1
`3
`-2.3
`4.1
`35
`0.9
`~2.2
`4.5
`37
`1.1
`*2.2
`4.3
`41
`1.7
`72.3
`4.8
`45
`1.1
`-2.4
`4.8
`49
`1 3
`-Z.6
`4.7
`53
`1.3
`~2.3
`4.7
`57
`1.1
`~31]
`5.1
`61
`1.1
`73.2
`5.5
`65
`1.3
`-3.3
`5.6
`69
`1 E
`
`
`Side Crash Page.0-
`
`1. Timefrom TRG to Initial G- Elapsed time from event trigger to the next sample
`
`2. Writing F/agfor Gy- indicates whether the data during the impact was transferred to the permanent
`
`EDR memory
`
`3.
`
`TRG Counter- number of EDR event triggers
`
`4. Previous Event- type of previous event
`
`5. Linked PreCrash Data Page No.- page number of linked data
`
`6. Time from Pre Crash TRG- amount of time from Pre Crash trigger
`
`7. Deployment Time(B-Pi/ar)— indicates when airbag was deployed after event trigger
`
`8. Deployment Time(C-Pi/ar)— indicates when airbag was deployed after event trigger
`
`9. Deployment Side- indicates which side of vehicle was impacted
`
`10. Writing Flag for Side Crash- indicates whether the data during the impact was written to the
`
`permanent EDR memory
`
`Side Post Crash Data Chart
`
`11. B Pillar GyAV(mph)— change in vehicle lateral speed in mph
`
`12. CPi/lar GyA(mph)— change in vehicle lateral speed in mph
`
`13. Floor GyAV(mph)— change in vehicle lateral speed in mph
`
`Note: Some reports may have data in a page titled “Side Crash Page.1” This data is from a second side impact
`event that was above the EDR threshold.
`
`OWNER EX. 2046, page 9
`
`Page | 9
`
`

`

`Roll Over — Post Crash = Only displayed if EDR is capable of recording Roll Over events
`
`Roll Over Page.0
`5
`_
`,
`R 0 Roll Angleldegl
`
`RecordStatus : Recorded
`User Data
`RECORDER
`lnt-esngauon Date
`lm-esngator
`Accident Date
`Vehicle
`“we've“
`W" Number
`Tool Verslonldownloadl
`ECU No
`Tool Verslonldisplayl
`COMMTYPE
`Roll Over Page.0
`Time from TRG to lnmal c
`
`'
`'
`Writing Flag for R ‘ORRA ‘Cvl
`R 0 RA 1.le Value .mhm zsec. from TRG
`
`(”Sh M°de
`TRC Counter
`Pram”: EvemAE]
`Lmked FreCrash Data Page No
`
`EDR
`04 23 2010
`ABC
`04 23 2010
`cX
`2010
`35135135135135135
`tremolo
`60630
`Ver.1.4.1,0
`CAN
`
`691ml
`
`Flnlshedertlng
`
`4575““?
`CrashData
`Sltlmes]
`Lateral
`Pagexfl
`
`Deployment Time
`Tlme from PreCrash TRc—.
`Writing Flag for R ‘o
`
`NotFlred
`409lm5l
`Finlshederllng
`
`\E
`
`
`
`\@
`
`\@
`
`3
`'5
`
`-1 0
`
`5
`3
`>5
`
`
`Timelms]
`115000
`—500
`0
`500
`1000
`1500
`1000
`10
`R'O Lateral cm. 5::
`
`
`
`
`
`"0
`.1;
`-500
`~1000
`Post Crash DatalVel Chg)
`
`0
`
`500
`
`1000
`
`1500
`
`T'me‘m”
`
`2000
`
`Tlmetmsl
`-571
`
`R‘O Roll Angleidegl
`>33
`
`‘
`R 0 Lateral mm 511
`—7.7
`
`73,;
`73.3
`7315
`5.7
`33.3
`443
`'577
`'4 3
`“57
`—a.6
`>25
`69
`—5.?
`-2 5
`-59
`713.4
`75.3
`197
`75.6
`76.7
`325
`—7.7
`-9 2
`453
`45.?
`—10.3
`581
`—3.8
`—10.0
`703
`71.3
`75.0
`537
`71.0
`1.7
`955
`2.9
`-0 s
`1093
`1.3
`1.5
`1211
`0.0
`0.0
`1349
`2.3
`0.0
`1477
`3.3
`03
`1605
`1.0
`-0 s
`1733
`0.0
`05
`1861
`
`
`Roll Over Page.0
`l.
`
`Timefrom TRG to Initial G- Elapsed time from event trigger to the next sample
`
`Writing Flag for R/O(RA/Gy)- indicates whether the data during the impact was written to the
`
`permanent EDR memory
`
`R/O RA MAX Value within 25ec. from TRG- Maximum roll angle within 2 seconds of event
`
`509°N9‘P‘P
`
`trigger
`
`Crash Mode- The type of roll event
`
`TRG Counter— number of EDR event triggers
`
`Previous Event— type of previous event
`
`Linked PreCrash Data Page No.- page number of linked data
`
`Timefrom PreCrash TRG- amount of time from Pre Crash trigger
`
`Deployment Time- indicates if or when airbag was deployed after the event trigger
`
`. Writing Flagfor R/O- indicates whether the data during the impact was written to the permanent
`
`EDR memory
`
`Roll Over Post Crash Data Chart
`
`11.
`
`12.
`
`R/O RollAng/e(deg)— angle of roll measured in degrees
`
`R/O Lateral G(m/sZ)- amount of lateral Gs
`
`Note: Some reports may have data in a page titled ”Roll Over Page.l" This data is from a second Roll
`
`Over event that was above the EDR threshold.
`
`OWNER EX. 2046, page 10
`
`Page | 10
`
`

`

`EDR - Frequently Asked Questions
`
`What is an EDR? An Event Data Recorder (EDR) is part of the Supplemental Restraint System (SRS) ECU that
`
`records data for some types of collision events for future safety research or analysis. An event is a change in
`
`vehicle speed that is more than typical of everyday use. For example, stopping hard with the brakes would not
`
`cause a recording, but hitting a curb may cause the EDR to record an event.
`
`Are EDRs required in cars? They are currently not required.
`
`Is the EDR a black box? No, the EDR is not a black box like on an airplane. It does not record sounds or
`
`conversations and does not have the capacity like an airplane blackbox. The EDR is simply part ofthe
`
`Supplemental Restraint System (SRS) ECU that only records certain vehicle data for a short period of time
`
`before or during a collision.
`
`What causes the EDR to record? The EDR starts to record when the vehicle experiences a rapid change in
`
`speed (like acceleration or deceleration) that exceeds a specified threshold higher than normal use. Hard
`
`braking will not cause an EDR to record, because that may be considered normal use. Impacting a curb hard
`
`may cause a recording as the vehicle body may change speed much quicker than normal use.
`
`Why were EDRS installed in Toyota/Lexus/Scion vehicles? EDRs have the capability to serve several purposes,
`
`such as assisting in vehicle development, quality control or safety research. Airbag deployment occurs very
`
`rapidly and it may be difficult to determine exactly what occurred during a collision. Although indirect methods
`
`may be used to determine airbag deployment circumstances, an EDR is a more direct method to understand
`
`airbag deployment circumstances.
`
`Do all EDRs record the same information? No. Due to different vehicle designs and changes in equipment, the
`
`information recorded varies by model and model year.
`
`Were there other recording systems before EDR in Toyota vehicles? Yes, some vehicles in the past had some
`
`impact recording capabilities, but these were not considered reliable for field use. There is no current
`
`capability to read these predecessors to EDRs.
`
`How accurate is the EDR data? The accuracy of the data from the EDR depends on the collision and the EDR
`
`capabilities. Government studies of Toyota EDRs indicate that Toyotas EDRs have similar capabilities to other
`vehicle manufacturers.
`
`What has Toyota clone to validate its EDRs and EDR tools? Toyota has been analyzing data from vehicles since
`
`they were first introduced to ensure the reliability of the EDR technology. Toyota performs imaging of our own
`
`vehicles as part of crash testing. Toyota also performs EDR imaging from US. Government crash testing and
`
`investigations, and when requested, in law enforcement investigations.
`
`How does the EDR record information? During a collision, the EDR calculates the delta V based on
`
`accelerometer data every 10 milliseconds and puts it into the permanent memory. During the intervals, other
`
`data is also placed into memory. |fa|| the data is not transferred into the permanent memory, a writing flag is
`
`put on the report. If all data is successfully transferred, the report states ’Finished writing’. In some very severe
`
`OWNER EX. 2046, page 11
`
`Page | 11
`
`

`

`impacts, electrical connections or internal EDR components may be damaged, resulting in incomplete data
`
`transfer to the permanent memory.
`
`How long is an event stored in the EDR? If the airbags are deployed in a collision, the EDR data is locked and
`
`cannot be erased or overwritten. If the airbags have not been deployed in previous EDR events, an event that
`
`causes the vehicle to experience a rapid change in speed (example: hitting a curb) that exceeds a specified
`
`threshold will overwrite previous EDR events.
`
`Why is a signed consent form required before performing imaging? Various states have privacy regulations
`
`that require consent before performing an EDR image.
`
`How is EDR data retrieved and does the retrieval process affect/change the data contained in the EDR?
`
`Depending on the vehicle’s condition, data can be imaged in one of two ways. The EDR tool is either connected
`
`through the vehicles DLC port, or the EDR is removed from the vehicle and the EDR tool is connected directly
`
`to the SRS ECU. Neither method alters or erases EDR data during the process.
`
`In some rare circumstances
`
`such as water immersions- the EDR data may not be able to be imaged using the EDR tool.
`
`What will I receive after the EDR image process has taken place on my vehicle? After the imaging has been
`
`completed, the EDR report and other reference documents will be provided.
`
`What is the difference between vehicle speed and delta V? Vehicle speed is how fast the vehicle moves
`
`relative to the ground - usually in miles per hour. It is understood that vehicle speed is the straight line speed
`
`of the entire vehicle. Delta V is the change in vehicle speed over milliseconds and is usually discussed as
`
`longitudinal, lateral or total delta V.
`
`Is there more than one deltaV? In some EDR reports there are longitudinal and lateral delta V data.
`
`When I review the data, the first airbag record looks good, but the other records make no sense. What’s
`
`going on? Some EDRs contain initial data in the registers. |f “RecordStatus” displays “Initial”, the information
`
`contained on that page is default data from the factory.
`
`Why can’t the EDR tool operator just tell the customer what the report says? Crashes can be very complex
`
`events. The EDR report is just one piece of information and without knowing other critical crash information,
`
`the EDR data could be misinterpreted with the context for the overall crash.
`
`Can the EDR tell me the date and time of collision? No, the EDR does not have a time stamp function.
`
`When will Toyota have a commercially available EDR tool? A commercially available EDR tool for
`
`Toyota/Scion/Lexus vehicles will be available before the government requirement date.
`
`OWNER EX. 2046, page 12
`
`Page | 12
`
`