Event Description
Event from the ECU of the Diesel Engine: »Malfunction Indicator Lamp«. The MI-Lamp is coded in J1939-DM1 message and signals malfunctions relevant to exhaust gas.
The Malfunction Indicator Lamp (MIL) is typically activated by the engine control unit to indicate the presence of a fault in the engine. The exact triggers for the activation of the MIL may vary depending on the engine manufacturer and the specific implementation of the engine control unit. However, here are some possible triggers:
- Engine emission faults: The MIL can be activated when the engine control unit detects a problem that does not comply with the engine’s emission standards. This could indicate issues with the exhaust after-treatment system, fuel system, sensors, or other components affecting the engine’s emission performance.
- Engine faults: The engine control unit may activate the MIL when it detects an engine-related fault. This could include faulty cylinder ignition, injection problems, improper air-fuel ratio control, or other engine component failures.
- Vehicle diagnostics: The engine control unit continuously monitors various systems in the engine. If it detects a problem in any of these systems, the MIL may be activated. This could include issues with the transmission and many other components.
- Sensors and actuators: The engine control unit can activate the MIL if it detects a fault in any of the engine’s sensors or actuators. Examples could include a faulty oxygen sensor, a defective camshaft sensor, a dirty mass air flow sensor, or a problem with the locking system.
It’s important to note that these are general examples, and the specific triggers for the activation of the MIL may vary depending on the engine model and manufacturer. For accurate information, consult the engine documentation or contact the manufacturer of the engine control unit.
The DTC (Diagnostic Trouble Code) consisting of SPN (Suspect Parameter Number) and FMI (Failure Mode Identifier) delivers specific information about a faulty property of the Diesel Engine. Look at the SPN/FMI Diagnostic Trouble Codes of the Hatz Diesel Engine 4H50 for more information.
Warning view
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Elements of the Event page
| Event symbol | Consequences of the event |
 Error event | When an error event occurs, the monitored value has reached its error limit. Error events shutdown the generator |
 Warning event | When a warning event occurs, the monitored value has reached its warning limit. Warning Events don’t shutdown the generator |
 Information event | An Information event is for information purpose only and has no effect on the generator operation |
| Device that triggers this event: | ECU of the Diesel engine |
| Warning | Yes |
| Error | No |
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