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If the Shutdown mode has been selected and the warning indicator activates, engine shutdown may take as little as 20 seconds from the time the warning indicator is activated. Depending on the application, special precautions should be taken to avoid personal injury. The engine can be restarted following shutdown for emergency maneuvers, if necessary. |
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The Engine Monitoring System is not a guarantee against catastrophic failures. Programmed delays and derate schedules are designed to minimize false alarms and provide time for the operator to stop the engine. |
Programmable features monitor the following conditions:
- Coolant temperature
- Oil pressure
- Inlet manifold air temperature
- Cooling system level (if equipped)
Coolant Level Sensor (If Equipped)
Note: The coolant level sensor is an optional feature.
The system can be programmed with one of the following options:
"ENABLED" - The system will monitor the input from the coolant level sensor. The system is not enabled when the engine is shipped by Caterpillar.
"DISABLED" - The system will not monitor the input from the coolant level sensor.
Note: Coolant Level sensors typically provide low coolant level and very low coolant level signals to the ECM.
Programmable Options and Systems Operation
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If the Warning/Derate/Shutdown mode has been selected and the warning indicator activates, bring the engine to a stop whenever possible. Depending on the application, special precautions should be taken to avoid personal injury. |
The engine can be programmed to the following modes:
- "OFF"
- "Warning"
- "Warning/Derate"
- "Warning/Derate/Shutdown"
The "DIAGNOSTIC" lamp and the warning signal (red lamp or buzzer) turn "ON" and the warning signal is activated continuously. The "Warning" signal alerts the operator that one or more of the engine parameters is not within normal operating range.
The "DIAGNOSTIC" lamp turns "ON" and the warning signal (red lamp or buzzer) is activated. After the warning, the engine will derate rpm and power. The warning lamp will begin to flash when the derating occurs.
When the engine is fully derated, the engine power is limited to
The "DIAGNOSTIC" lamp turns "ON" and the warning signal (red lamp or buzzer) is activated. After the warning, the engine will derate rpm and power. The engine will continue to derate rpm until a shutdown of the engine occurs. The engine can be restarted after a shutdown for use in an emergency.
A shutdown of the engine may occur in as little as 20 seconds. The engine can be restarted after a shutdown for use in an emergency. However, the cause of the initial shutdown may still exist. The engine may shut down again in as little as 20 seconds.
Coolant Level: When programmed to "Warning", the "Check Engine" lamp turns ON and the "Warning" lamp will turn ON for a low coolant level after 10 seconds. The same lamps will be ON if there is very low coolant level signal after 30 seconds
When programmed to "Derate", the "Check Engine" lamp will be ON. There will be a 10 second delay when very low coolant is detected in order to verify the condition. The "Warning" lamp will flash and the engine will derate to
Oil Pressure: When monitoring is programmed to "Warning". The "Check Engine" Lamp and the "Warning" lamp will illuminate when the low oil pressure has been detected for 4 seconds. When low oil pressure has been detected for 8 seconds, the "Check Engine" lamp and the "Warning" lamp will be turned "ON".
When programmed to "Derate". The "Check Engine" lamp and the "Warning" lamp will turn "ON"when the low oil pressure has been detected for 4 seconds. When low oil pressure has been detected for 8 seconds, the "Warning" lamp will flash and the engine will be "derated".
When programmed to "Shut Down". The "Check Engine" lamp and the "Warning" lamp will turn "ON" when the low oil pressure has been detected for 4 seconds. When low oil pressure has been detected for 8 seconds, the "Warning" lamp will flash during engine derate. The engine will shut down after 30 seconds as well.
Coolant Temperature: The monitoring system has "Warning", "Derate", & "Shutdown" strategies for abnormally high coolant temperatures. The High Coolant temperature" trip point is
When programmed to Warning, the "Check Engine" lamp and the "Warning" lamp will turn "ON" at the High Coolant temperature trip point.
When programmed to Derate, the "Check Engine" lamp and the "Warning" lamp will turn "ON" at the High Coolant temperature trip point. The "Warning" lamp will flash at the Very High Coolant temperature trip point and the engine power will be derated 25%. The engine will be derated an additional 25% for each Degree C above the initial diagnostic code trip level. At 100% derate, the engine is derated to 160 horse power and 45 mph in vehicle speed.
When programmed to Shut down, the "Check Engine" lamp and the "Warning" lamp will turn "ON" at the High Coolant temperature trip point. The "Warning" lamp will flash at the Very High Coolant temperature trip point and the engine power will be derated. After approximately 25 seconds the engine will be shut down.
Note: When programmed to "Shutdown".The engine will shut down approximately 25 seconds after the engine has exceeded the diagnostic trip point for Very High Coolant temperature. Total engine power derate may not occur before shutdown.
Inlet Manifold Air Inlet Temperature
Intake manifold air temperature is monitored to warn the operator of excessive intake manifold air temperature. Excessive intake manifold air temperatures will not cause the ECM to derate or shutdown the engine when Engine Monitoring is programmed to "Derate" or "Shutdown".
Intake manifold air temperature must exceed the triggering temperatures for 30 seconds while the engine is running and the engine coolant temperature is above
Battery Monitor and Engine Control Voltage. The battery monitor and engine control voltage parameter is used to determine the voltage trip point. If the system voltage falls below the voltage trip point, the Battery Monitor and Engine Speed Control system will automatically elevate engine idle. The elevation in engine idle will maintain ideal battery system voltage. This feature is used to promote additional battery life. The engine idle will only be increased if the vehicle is stopped and the transmission is out of gear. If these conditions are not met, the engine idle will not be adjusted. This feature will not function when the engine is operating in dedicated PTO mode (PTO On/Off switch in the ON position). The recommended setting is 12.2 V for a 12 Volt system, and 24.5 V for a 24 Volt system. The elevated speed is 1,000 rpm or less if the Idle rpm limit is less than 1,000 rpm. Engine speed will only be elevated when the transmission is in Neutral. This feature is not enabled when shipped from Caterpillar (Default value is 0). The Smart idle parameter battery monitor and engine control voltage feature is enabled by programming a voltage value.
For more information or assistance for repairs, consult your Caterpillar dealer.
Note: The customer specified parameters may be secured by customer passwords. The engine may have all of the parameters that are programmed or any combination of the parameters that are programmed. Refer to the Operation and Maintenance Manual, "Configuration Parameters" topic for more information on the programmed parameters of the engine.