How the CDR Tool Works
The Bosch CDR Tool is easy to set up and use. The CDR Tool is a combination of hardware and software which together “image” crash data from supported vehicles. The CDR Tool can access and retrieve the data through the vehicle’s universal data port - the “DLC” - found in all late model passenger cars, light trucks and SUVs from which data can be retrieved using the CDR Tool, or you can connect directly to certain control modules in the vehicle to image the same crash data.
It is highly recommended to take a CDR Technician Level 1 & 2 course prior to using the CDR Tool so you more fully understand the proper use and limitations of the CDR Tool.
Normal Methods of Retrieval
Below are a couple simple illustrations of the Direct to Module retrieval and the Direct to Vehicle retrieval methods.
Whether the technician connects direct to the module or through the DLC, the next step in imaging data is to run the CDR Tool software. The software is essentially menu driven, prompting the technician through a series of screens to establish information such as the vehicle’s make and model, VIN and case information. After the setup screens, the technician will confirm the software is ready to communicate with the module and, using the CDR Interface Module, the software communicates with the module and makes a image (copy) of any EDR data stored in the module. The software confirms an actual copy of the data is received then the technician is prompted to "save" the EDR data to their computer and a protected digital file is created. A translation of the retrieved data image can then be viewed on screen, printed to paper or to a PDF.
What Gets Recorded?
An "event" is a crash or other physical occurrence which causes a trigger threshold to be met or exceeded. Data from the collision is stored in the vehicle's airbag control module as either a “non-deployment” event or a "deployment" event. The NHTSA Ruling mandates a minimum set of data parameters to be reported on a CDR report across all vehicle manufactures. See Table 1 below. However, this is the minimum, many auto manufacturers provide more data parameters that that listed in Table 1. Different make and model vehicles record different amounts of data and also vary in the number of "events" stored in the module.
Where is Crash Data Recorded?
Crash data in passenger cars, light trucks and SUVs retrievable using the CDR Tool is recorded in one or more of the following manufacturer installed control module(s):
Which of these control modules crash data may be recorded to depends on system design choices made by the individual vehicle manufacturer (i.e. Ford, GM, Honda, etc.).
Airbag Control Module (ACM)
This is the most common source for recorded crash data, particularly in recent model cars. Airbag Control Module (ACM) is the generic name for the electronic control module (ECU) found in airbag equipped passenger cars, light trucks and SUVs. The ACM controls the function of various supplemental restraint systems (i.e.: airbags and seat belt pretensioners). For CDR Tool supported vehicles, this module includes the "EDR" capability.
Roll Over Sensor Module (ROS)
Only associated with General Motors vehicles accessible using the CDR Tool, the Roll Over Sensor (ROS) is a separate but connected control module used to determine whether or not a "rollover condition" is imminent or present and which works with the ACM to deploy "occupant containment" system components including belt pretensioners and occupant containment side curtain airbags. It has its own "EDR" capability and is imaged in a step separate from imaging the ACM (although it is in the same vehicle).
Powertrain Control Module (PCM)
Certain Ford Powertrain Control Modules (PCM) may record data which may be associated with a crash event. Access and data elements are limited to select Ford vehicles as indicated in the CDR software Help file. For supported vehicles, the data is stored effectively as the PCM’s "EDR" capability although the PCM has no independent crash sensing capability.
Tech Support: 855-267-2483
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