854K Wheel Dozer Electrohydraulic System Caterpillar

When the ECM activates an event code, the operator or the technician will be alerted. Most active events will be logged by the ECM. Some events are not logged to the ECM. The active events and the logged events can be viewed with the Caterpillar Electronic Technician (Cat ET).

Warning Levels

The ECM will assign one of the three warning levels to an active event code according to the severity of the abnormal system condition. Each warning level requires a specific response from the operator. The warning levels and 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 involved system. Perform any necessary maintenance to the 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 cause of this warning may result in component damage. The problem that caused the event may require a correction before the machine may resume operation.

Warning Level 3

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

Indications and System Response

Message

(1) The active warning indications are marked with an X.

(2) This is the possible result, if the operator takes no action.

(3) The alarm is on continuously.

(4) The alarm is on intermittently.

Cat ET

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 for 1000 hours.

• 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.

Troubleshooting

Perform the following steps in order to troubleshoot an event:

1. Obtain the following information from the operator:
   • The event and the time of the event

   • Determine the machine operating conditions at the time of the event. Conditions such as engine RPM and load may be important.

   • Determine if there are any systems that were installed by the dealer or by the customer that could cause the event.

2. Some of the events below can become active during normal system operation. Verify that the event is not due to error of the operator.

3. Check all fluid levels and all oil levels.

4. Troubleshoot and repair any active diagnostic codes.

ECM Event Code List

The following table lists the event codes that apply to the control system. The recommended response is listed. Use the Cat ET service tool in order to determine the event codes that are active or logged.