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).
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 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 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 2 requires changing the operation of the machine or performing a maintenance procedure. Failure to correct the cause of this warning may result in severe component damage. The problem that caused the event may require a correction before the machine may resume operation.
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
| WARNING OPERATION(1) | |||||
|---|---|---|---|---|---|
| Warning Level | (Warning Indications) | "Operator Action Required" | (Possible Result)(2) | ||
| "Alert Indicator Flashes" | "Action Lamp Flashes" | "Action Alarm Sounds" | |||
| 1 | X | No immediate action is required. The system needs attention soon. | No damage will occur to the machine. Minor reductions in machine performance may occur. | ||
| 2 | X | X | Change machine operation or perform maintenance to the system. | Severe damage to components can occur. | |
| 2-S | X | X | (X)(3) | Immediately change the machine operation. | Severe damage to components can occur. |
| 3 | X | X | (X)(4) | Immediately perform a safe engine shutdown. | Injury to the operator or severe damage to components can occur. |
(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.
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.
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.
Perform the following steps in order to troubleshoot an event:
- 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.
- Some of the events below can become active during normal system operation. Verify that the event is not due to error of the operator.
- Check all fluid levels and all oil levels.
- Troubleshoot and repair any active diagnostic codes.
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.
| Event Codes | |||
|---|---|---|---|
| EID | Level | Description | Possible Cause/Recommended Response |
| 349 | 1 | Lift Linkage | movement detected with no command given |
| 350 | 1 | Tilt Linkage | movement detected with no command given |
| 351 | 1 | Lift Linkage | movement detected in wrong direction |
| 352 | 1 | Tilt Linkage | movement detected in wrong direction |
| 354 | 2 | Fan Pump Pressure | fan pump pressure low / service required |
| 542 | 3 | Steering Pump Pressure | steering pump pressure low / shutdown machine safely |
| 784 | 2 | Payload Weight Too Heavy to Zero | reduce bucket weight |
| 791 | 1 | HVAC Monitor Circuit Open | A/C refrigerant monitoring circuit has excessive open time / service soon |
| 861 | 1 | Clock Manual Alignment Required | manually align clock |
| 878 | 2 | Hydraulic Oil Temp | high hydraulic oil temperature / reduce severity of machine operation. service may be required |
| 878 | 3 | Hydraulic Oil Temp | high hydraulic oil temperature / safely shutdown machine |
| 1185 | 2 | Fan Pump Motor Case Drain Filter | filter is plugged / replace filter |
| 1186 | 2 | Implement Pilot Oil Filter | filter is plugged / replace filter |
| 1198 | 2 | Steering / Brake Pump Case Drain Filter | filter is plugged / replace filter |
| 2086 | 2 | Hydraulic Fan Return Filter | filter is plugged / replace filter |
| 2116 | 1 | Implement Pilot Oil Pressure | implement oil pressure is high / service required |
| 2117 | 1 | Implement Pilot Oil Pressure | implement oil pressure is low / service required |
| 2118 | 1 | Steering Pilot Oil Pressure | steering pilot oil pressure is high / service required |
| 2119 | 1 | Steering Pilot Oil Pressure | steering pilot oil pressure is low / service required |
| 2121 | 2 | Steering Pilot Oil Filter | filter is plugged / replace filter |
| 2126 | 1 | Payload Overload Limit Exceeded | bucket weight too high / reduce bucket weight |
| 2134 | 3 | Primary Steering Pressure | primary steering pressure is low / safely shutdown machine |
| 2142 | 2 | Steering Oil Temp | steering oil temp is high / service required |
| 2142 | 3 | Steering Oil Temp | steering oil temp is high / safely shutdown machine |
| 2147 | 2 | Implement Case Drain Filter | filter is plugged / replace filter |