26SI Series Alternator – Event Code List

Event codes alert the operator or the technician that an abnormal operating condition exists in one of the machine systems.

When an Electronic Control Module (ECM) activates an event code, the operator or the technician will be alerted by the Messenger. Most active events will be logged by the ECM. Some events are active only. Active only events are not logged. The events that are active and the events that are logged can be viewed with the following equipment:

  • Messenger

  • Caterpillar Electronic Technician (Cat ET)

Warning Levels

The ECM will assign a warning level to an active event code. Event codes are one of three levels. The level represents the severity of the abnormal condition. Each warning level requires a specific response from the operator. The warning levels and the required operator response are listed below.

Warning Level 1

Warning level 1 alerts the operator that a machine system requires attention. The operator should check the system condition or perform maintenance on the involved system at the earliest possible time.

Warning Level 2

Warning level 2 requires changing the operation of the machine or performing a maintenance procedure. Failure to correct the problem that caused this warning may damage the components that are involved in the system.

Warning Level 3

Warning level 3 requires an immediate safe shutdown of the machine in order to avoid damage to the machine or injury to personnel. The problem that caused the event must be corrected before machine operation can resume.


Indications and System Response

Caterpillar Electronic Technician (Cat ET) Service Tool

When an abnormal operating condition occurs, the status screen on the Cat ET indicates that there is an active event.

Event codes are displayed on Cat ET in the following format:

EXXXX Description of the code

The “E” means that the code is an event code. The “XXXX” is a numeric identifier. The numeric identifier is followed by a description of the code.

Active event codes are listed in ascending numerical order. The code with the lowest number is listed first. The active event code is removed from the list when the condition is no longer present.

Logged Event Codes

Some event codes are logged in the ECM memory. Some event codes are active only. The logged event codes are listed in chronological order. The most recent code is listed first.

A logged code is cleared from memory when one of the following conditions occur:

  • The service technician manually clears the code.

  • The code does not reoccur after a number of hours determined by each ECM.

  • A new code is logged and there are already ten logged codes in memory. In this case, the oldest logged code is cleared.

Note: Always clear logged event codes after investigating and correcting the problem which generated the code.


List of Event Codes

The following table lists event codes and the recommended responses. Use the Cat ET service tool in order to determine the event codes that are active or logged.

Table 1
List of Event Codes (EID)    
EID     Level     Description     Possible Cause and Recommended Response    
861     1     Synchronized clock notification of manual synch required     In a PL522 or 523 system using sync-clock and Product Link that is not the master ECM, the Product Link module will automatically sync to the master ECM hours if the difference is not greater than 50 hours. If the difference is greater than 50 hours, a diagnostic will be generated in Cat ET that indicates that a manual sync is required. In that instance, sync the hours. In Cat ET, use “Service/Synchronize Service Meter Hours”.    
630     2     Switched Sensor #1 trip condition is activated     The PL522 or 523 has four additional inputs that can be configured in order to monitor switches on the machine. These inputs can be configured by using Caterpillar Electronic Technician (Cat ET service tool). Troubleshoot input as setup by the dealer.    
631     2     Switched Sensor #2 trip condition is activated     The PL522 or 523 has four additional inputs that can be configured in order to monitor switches on the machine. These inputs can be configured by using Caterpillar Electronic Technician (Cat ET service tool). Troubleshoot input as setup by the dealer.    
632     2     Switched Sensor #3 trip condition is activated     The PL522 or 523 has four additional inputs that can be configured in order to monitor switches on the machine. These inputs can be configured by using Caterpillar Electronic Technician (Cat ET service tool). Troubleshoot input as setup by the dealer.    
633     2     Switched Sensor #4 trip condition is activated     The PL522 or 523 has four additional inputs that can be configured in order to monitor switches on the machine. These inputs can be configured by using Caterpillar Electronic Technician (Cat ET service tool). Troubleshoot input as setup by the dealer.    
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