76 RENR5042-02 Troubleshooting Section E360-1 Low Oil Pressure Warning Troubleshooting E360-2 Low Oil Pressure Derate For basic troubleshooting of the engine, perform the following steps in order to diagnose a malfunction: E360-3 Low Oil Pressure Shutdown The definition for a warning, a derate, and a shutdown are defined below: 1. Obtain the following information about the complaint: The event and the time of the event Warning This condition represents a serious problem with engine operation. However, this condition does not require a derate or a shutdown. Determine the conditions for the event. The conditions will include the engine rpm and the load.
Derate For this condition, the ECM reduces the engine’s power in order to help prevent possible engine damage. Determine if there are any systems that were installed by the dealer or by the customer that could cause the event. Shutdown For this condition, the ECM shuts down the engine in order to help prevent possible engine damage. Determine whether any additional events occurred. Logged Event Codes 2. Verify that the complaint is not due to normal engine operation. Verify that the complaint is not due to error of the operator. When the ECM generates an event code the ECM logs the code in permanent memory. The ECM has an internal diagnostic clock.
The ECM will record the following information when an event code is generated: 3. Narrow the probable cause. Consider the operator information, the conditions of operation, and the history of the engine. The hour of the first occurrence of the code 4. Perform a visual inspection. Inspect the following items: The hour of the last occurrence of the code The number of occurrences of the code Fuel supply Logged events are listed in chronological order. The most recent event code is listed first. Oil level Oil supply This information can be helpful for troubleshooting intermittent problems. Logged codes can also be used to review the performance of the engine.
Wiring Connectors Clearing Event Codes Be sure to check the connectors. This is very important for problems that are intermittent. Refer to Troubleshooting, “Electrical Connectors - Inspect”. A code is cleared from memory when one of the following conditions occur: If these steps do not resolve the problem, identify the procedures in this manual that best describe the event. Check each probable cause according to the tests that are recommended. The code does not recur for 100 hours. A new code is logged and there are already ten codes in memory. In this case, the oldest code is cleared. Trip Points for the Monitoring System The service technician manually clears the code.
The monitoring system determines the level of action that is taken by the Electronic Control Module (ECM) in response to a condition that can damage the engine. When any of these conditions occur, the appropriate event code will trip. Always clear logged event codes after investigating and correcting the problem which generated the code.