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| Illustration 1 | g01873681 |
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Temperature conditions for typical temperature sensors determine when an ECM activates an event code and/or a diagnostic code for the sensor circuit. | |
Event codes are activated by an ECM when a transmission system condition is detected that is outside of the expected normal system range. The detected condition is within the operational range of the sensor that is being used to monitor the system.
When the ECM detects a sensor signal that is out of the sensor operational range, a diagnostic code will be activated. Generally, a diagnostic code and an event code will not be activated at the same time for the system and the sensor. If an event and a diagnostic code are both activated on a sensor, resolve the cause of the diagnostic code before troubleshooting the active event. Resolving the cause of the diagnostic code could also cause the event to clear.
The circuit or sensor is often not the cause of an active event as the signal is still within the sensor operational range. The most likely cause of the active event will be machine conditions that result in an abnormal system condition. For a subsystem that is monitored by a temperature sensor, an active high temperature event could be caused by a number of conditions. Conditions such as low coolant levels, dirty filters, clogged intakes, or cooling fan problems. When an event is activated and a diagnostic code is not active for the involved sensor, always investigate the machine conditions. Suspect machine conditions causing the problem before suspecting the sensor as the cause of the problem.
When a control module activates an event code, the operator or the technician will be alerted by an error message on the display. The message and / or an audible alarm will indicate the severity of the problem. All of the active events will be logged by the ECM. The active events and the logged events can be viewed on the Monitoring System Display or Caterpillar Electronic Technician (Cat ET). Up to 127 logged event codes can be stored by the ECM.
The ECM will assign one of three warnings 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.
An active warning level 1 event alerts the operator that a machine system could require attention. Level 1 events are logged, not displayed. If a Level 1 event is repeatedly activated, investigate the possible cause of the problem at the first opportunity. Check the involved system condition or perform maintenance on the involved system.
An active warning level 2 event can require a change in the operation of the machine to correct a problem. A warning level 2 event can indicate the need for a maintenance procedure. A level 2 warning that remains active or is repeatedly activated should be investigated at the earliest opportunity. Failure to correct the problem may result in the problem becoming more severe or possible damage to machine system components.
An active warning level 3 event requires an "Immediate Safe Engine Shutdown" by the operator to avoid possible damage to a machine system. Generally, a warning level 3 event will cause the ECM to disable operation of the involved system. The cause of the active event must be reset or resolved before the system can resume normal operation.
Portions of this material are reprinted with permission from SAE J1939DA_201607© 2016 SAE International. SAE International is not responsible for any use or translation of this material, in whole or in part. Please contact SAE International to obtain a complete copy of SAE J1939DA_201607, the official definitive source of this standard.
| WARNING OPERATION | |||||
|---|---|---|---|---|---|
| Level | Warning Indications | Required Operator Action | Possible Result (1) | ||
| Amber Action Indicator | Red Action Indicator | Action Alarm Sounds | |||
| 1 | ON | OFF | OFF | No immediate action required. The system needs attention soon. | No harmful or damaging effects. |
| 2 | OFF | Flash ON and OFF | OFF | Change machine operation or perform maintenance to the system. | Possible damage to system components. |
| 3 | OFF | Flash ON and OFF | Pulse ON and OFF | Follow the displayed Monitoring System Display instructions. | Operator injury or severe damage to components. |
| (1) | The possible result if action is not taken. |
| Event Code / J1939 SPN-FMI Cross Reference | |
|---|---|
| EID | Description |
| E30 (2) | High Transmission Oil Temperature |
| E155 (2) | High Torque Converter Oil Temperature Warning |
| E329 (3) | Transmission Filter Plugged Warning |
| E861 (0) | Clock Manual Alignment Required Warning |
| Event Codes for Transmission / Chassis ECU (MID 27) | ||
|---|---|---|
| Code (Level) | Description | Possible Cause or Recommended Response |
| E30 (2) | High Transmission Oil Temperature | Active: Transmission will latch to NEUTRAL if the torque converter outlet temperature is greater than Inactive: When the torque converter outlet temperature drops below Note: The high temperature response mode is an optional feature that will put the transmission in a safe mode in a transmission overheating event. This feature is disabled by default and enabled through a programmable parameter in Cat ET |
| E155 (2) | High Torque Converter Oil Temperature | Active: Torque converter oil temperature is greater than or equal to Inactive: when torque converter oil temperature is less than Reduce load or increase engine speed, reducing operation in torque converter drive. Also, ensure that torque converter oil level is correct. |
| E329 (3) | Transmission Filter Plugged | Conditions that can cause this event:
Engine is running, trans sump temp > An open is detected in the normally closed bypass circuit (two switches in series). Note: The bypass circuit is ignored by the software until trans oil temp exceeds Resets when all of the above conditions are removed for 1 second Replace the filter. To check, cut filter and inspect for debris. If problem is with the bypass indicator circuit, refer to the electrical schematic and perform necessary checks. Pressure drop across the filter is measured across the sample port on the filter inlet and the pressure tap on the outlet side. Adapters from the No. 8 female port in the filter base to a standard quick disconnect may be used to replace the sample port. Ensure that pressure is released from the circuit before attempting to change fittings. (1) Pressure drop across the filter should not exceed |
| E861 (0) | Clock Manual Alignment Required | The ECM internal clock is also known as an electronic service hour meter. The implement hour meter is too far out of alignment with other ECU / ECM hour meters. Use Cat ET to synchronize the ECM hour meters. At the top menu, click on Service, and Synchronize Service Hour Meters from the drop-down menu. Next, click the Synchronize button to synchronize all service hour meters. A pop-up dialog box will inform you of a successful synchronization of each ECM. |
| (1) | A 243-3133 fluid sampling coupler will connect directly to the sample port, but is not recommended for diagnostic purposes. |