The top of the chip is marked by a half moon indentation. This is usually the wire on the upper right of the EEPROM. To disable the EEPROM cut its voltage pin. The EEPROM is only used for archiving data for accident analysis-it has no operational function for the car. This does not affect the operation of the rest of the system which uses RAM as memory. If you disable it no record will be present. (Option 2) The EEPROM is where the permanent data record is stored. If you cut them the data still exists, but cannot be read without someone finding and repairing the cut. To disable the memory portion of an EDR there are two options: (Option 1) To disable the interface look for traces or connectors to the open plug on the box. The crash algorithm does various things including activating the airbags. An overly simplified explanation of the way the airbags work is that an accelerometer feeds a circuit that activates the crash algorithm if the accelerometer shows a steep deceleration for several cycles in a row. It will have a yellow wiring harness plug, as do all airbag system components, and the plug is usually held in place by at least one "lock" to prevent it from coming dislodged inadvertently.ĭisconnecting or tampering with the EDR may prevent the airbags from working. It is usually a square-ish box 4-5 inches on a side.
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It's definitely tied into the SRS so if you decide to mess with it, just plan on setting off your Airbags.Įvent data recorder - Wikipedia, the free encyclopediaĪn EDR is typically mounted either under a front seat, inside the center console between the seats, or inside the dashboard.
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