LINK ASSEM. 8S1731 - Caterpillar

Engine Events
Engine events are typically abnormal engine operating conditions such as low oil pressure or high coolant temperature. Engine events may also be informational in nature, such as the logging of an event when the emergency stop button is pushed. If an engine event is detected by the Electronic Control Module (ECM), the ECM will generate a code. The identifier for the code will be an event code if the technician is monitoring the code over the Cat Data Link. If the technician is monitoring the code over the CAN data link, the identifier will be a Suspect Parameter Number (SPN) - Failure Mode Identifier (FMI) code. These codes aid the service technician in identifying the nature of the problem. The technician must have access to a diagnostic tool in order to read specific trip information about the code.There are two types of data links that are used for communication with the engine ECM. Each data link displays the code in a different way. The data links are described below:Cat Data Link
The Cat Data Link is used by the ECM to communicate with Caterpillar controllers or Caterpillar display modules. Caterpillar Electronic Technician (ET) is a software program that is designed to run on a personal computer. Cat ET can be used by the service technician to view trip point information about the event codes. The following definitions describe the elements of the event code identifiers:Event Code - The leading "E" identifies the code as an event code. The following numbers ("XXX(X)") represent the numeric identifiers for the event code. The leading numbers in the event code are a numeric representation that typically defines the symptom of the problem. The number in parenthesis, "(X)", is called a Warning Category Indicator (WCI). The WCI identifies the severity of the abnormal condition. The code description follows the event code. Refer to the following example:
E360(1) Low Engine Oil Pressure
E360(2) Low Engine Oil Pressure
E360(3) Low Engine Oil PressureAll three warning category indicators can be programmed for each parameter. Some parameters, however, may not require the use of all levels. Table 1 relates each WCI to the related severity level.
Table 1
Warning Category Indicator to Level of Severity
WCI Severity Level
(1) Least Severe
(2) Moderate Severity
(3) Most Severe The definition for the levels of severity for an event are defined below:Level (1) - Level (1) requires no immediate action. The system may need attention soon. The operator should check the condition of the system and perform maintenance on the system at the earliest possible time. This severity level may also be a warning of the beginning of a component failure.Level (2) - Level (2) requires a change in the operation of the engine, or the performance of a maintenance procedure. Failure to correct the problem that may result in damage to related engine components.Level (3) - Level (3) requires an immediate safe shutdown of the engine in order to avoid damage to the engine or injury to personnel around the engine. The problem that caused the event