TUBE 1W0254 - Caterpillar

- The state of the security system when the machine is disabled.CAN Data Link (CAN) - The CAN data link is an electrical connection for communication with onboard devices.Disarmed - The state of the security system when the machine is able to operate normally.Electronic Control Module - The portion of the MSS that contains the microprocessor and memoryElectronic Key Reader - The electronic key reader module sends key information to the ECM. The information is transmitted from the exciter coil to the key reader module.EID - Event IdentifierExciter Coil - The exciter coil is a small coil of fine wire. The wire is molded into the bezel of a keyswitch with harness wiring. The exciter coil provides a path of communication. The electronic key and the electronic control module communicate via radio frequency.Factory Password - Protects the machine when using the service tool. The password must be used when any modifications are done to the MSS.Immobilizer - The Machine Security System Immobilizer is a feature within another ECM (Engine and/or Transmission). This feature restricts the operation of the machine until the Machine Security System disarms.Master Access Level - A level of access to permit the operation of the machine. In addition, the key allows the user to add new keys into the ECM and allows MSS settings to be modified without a factory password. Also, keys that are already programmed can be modified. MSS - Machine Security SystemPID - A parameter identifier is used to identify specific parameters that are used by the MSS.Product ID - The Product ID is an 8 digit alphanumeric number that identifies the machine.Programming - Programming refers to the process of storing information in the memory of the control module. Software Enable Attachment - A feature or function on a machine that uses software in order to enable the functionality. The actual software used to accomplish the function is embedded in the standard machine software (flash file). The feature requires a factory level password in order to activate.Standard Access Level - Keys that are programmed for this level of access permit the operation of the machine.Tattletale - The tattletale is a counter in the ECM that is used as part of the calculation for the factory password. The tattletale is incremented after a factory password is used. The affected parameter will have an increase in the specific parameter of the tattletale and the total tattletale will reflect the increase as well. Once you use the factory password, the factory password will no longer be valid. To make a change on the same ECM at a later date, another password will be required.