Engine State Monitor on Cummins INSITE Software (CUMMINS Engines)

Engine State Monitor

Figure 1.1 - ECM Diagnostic Tests

The Engine State Monitor displays the active control state of an engine including any active derates. This feature can be used to identify the root cause of an engine's performance issue.

To Perform the Test:

1). Open and connect the Cummins INSITE Software. Read More: How to Connecting CUMMINS Engines using Cummins INSITE Software.
2). Select ECM Diagnostic Tests from the INSITE Viewbar.
3). In the ECM Diagnostic Tests Wizard, select Engine State Monitor, as Figure 1.1 above.
4). Click Next and the Engine State Monitor Test window will open.

Figure 1.2 - Engine State Monitor

5). Note the messages in the Instructions and Status boxes.

#Initial Conditions:

→Engine running.

#Steps:

→Select Start.

→Monitor the Engine Operating State.

→Select Stop to end the test.

#Additional Information:

→Operate the vehicle on a chassis dynamometer or drive the vehicle at the same operating conditions where the performance complaint exists.

6). Click on the Start button.

Figure 1.3 - Engine State Monitor (Start)

7). Operate the vehicle on a chassis dynamometer or drive the vehicle at the same operating conditions where the performance complaint exists.

Figure 1.4 - Low Speed Governor State

Figure 1.5 - High Speed (All Speed Accelerator)

8). Click on the Stop button to stop the test.

Figure 1.6 - Test Stopped

9). Click on the Back button to return to the ECM Diagnostic Tests Wizard.

Engine State Descriptions (Monitors - Value):

1). Aftertreatment Regeneration Active

The engine is performing a regeneration of the diesel particulate filter. This is normal operation during regeneration of the diesel particulate filter.

2). Air Density Limit State

The engine is currently being derated for high altitude conditions.

3). Air Fuel Control Derate

The engine fueling is being limited due to lack of oxygen (boost pressure). This state will normally be active for a few seconds during a hard acceleration to prevent excessive black smoke. Excessive time operating in this states indicates the lack of boost pressure (oxygen) entering the engine. Troubleshoot the air intake system.

4). All Speed Governor

The All Speed Governor is controlling the engine speed. This is a normal state when the throttle pedal is depressed and the All Speed Governor is enabled (as Figure 1.5 above).

5). All Speed Governor Application

The industrial All Speed Governor is controlling engine speed. This is a normal state when the all speed governor is enabled.

6). Alternate Torque

This is a normal state when the alternate torque feature is enabled.

7). Alternator Failure Warning

The Alternator Failure Warning Feature is active. Check the alternator for correct operation.

8). Altitude Derate

The engine torque output is being limited due to high altitude conditions. Confirm the altitude operation of the engine and the ambient air pressure sensor reading.

9). Ambient Derate State

The engine torque output is being limited due to high altitude conditions. Confirm the altitude operation of the engine and the ambient air pressure sensor reading.

10). Anti-Theft Derate

An anti-theft device is currently derating the engine.

11). Automotive Governor

The Automotive Throttle is controlling the engine speed. This is a normal state when the throttle pedal is depressed and the automotive governor is enabled.

12). Charge Manager State

The ECM is limiting the amount of charge pressure to protect the air handling system. This is normal operation to prevent air handling system damage.

13). Coolant Derate State

The engine torque output is being limited due to high coolant temperature. Troubleshoot the high coolant temperature conditions.

14). Crank State

The engine is cranking and is in the process of starting. The engine speed sensor is receiving a good speed signal and the fuel system is delivering the recommended fueling to start the engine.

15). Cruise Control

The vehicle is currently operating with the cruise control feature active. This is a normal state when the vehicle is operating in cruise control.

16). Data Link Powertrain Protection State

The engines torque output is currently limited by the power train protection feature. Please verify the Powertrain Protection adjustable parameter settings.

17). Data Link Speed

The engine torque output is being controlled by a J1939 device such as an automatic transmission. This state should only be active during a shifting event.

18). Data Link Torque Derate

The engine torque output is being controlled by a J1939 device.

19). EGR Fueling Limit State

The engine is currently operating on the torque curve and maximum fueling. This is a normal state when the engine is operating at maximum fueling on the torque curve.

20). Engine Brake

The engine brakes are currently activated. This is a normal state when the engine brakes are active.

21). Engine Overspeed

The engine speed has exceeded the overspeed limit set in the calibration. The engine is being operated downhill or operating from a secondary fuel source.

22). Engine Protection

The engine torque output is currently limited by an engine protection state. Check the fault codes and determine the root cause of the engine protection derate.

23). Engine Protection Derate

The engine is currently being derated by an engine protection state. Check the fault codes and determine the root cause of the engine protection derate.

24). Engine Startup Oil Limit

The engine startup protection feature is limiting throttle control until oil pressure is reached. This is normal operation at startup until operating oil pressure is reached.

25). Engine Stop

This is a normal state when the key switch is on and the engine is not running.

26). Engine Warm-Up Protection

The Engine Warm-Up Protection feature is active. This is a normal operation at startup until operating oil pressure and temperature is reached.

27). Firetruck Governor

The firetruck governor is controlling the engine. This is a normal state when the firetruck governor feature is enabled.

28). Fuel System Derate

A fuel system fault code is active and is currently limiting the engine torque and/or speed output. Check for active fuel system fault codes causing the derate.

29). Fueling High Speed Governor State

The engine is operating at the maximum engine speed. This is a normal state when the engine is operating on the high speed governor.

30). High Fuel Temperature Engine Protection

The engine torque output is being limited to to high fuel temperature. Troubleshoot the high fuel temperature conditions.

31). Industrial Auxiliary Governor

The industrial auxiliary governor is controlling engine speed. This is a normal state when the auxiliary governor is enabled.

32). Industrial Engine Speed Cruise Control

The industrial engine speed cruise control feature is active. This is normal operation when the engine speed cruise control feature is active.

33). Limp Home

A throttle pedal fault code is currently active, the throttle pedal operation will be disabled until the fault is cleared.

34). Load Based Speed Control

The Load Based Speed Control feature is active. Use INSITE™ to verify the Load Based Speed Control feature settings.

35). Low Speed Governor State

The engine is currently idling on the low speed governor. The throttle pedal is released, the vehicle is stationary, and the engine is idling (as Figure 1.4 above).

36). Maximum Throttle

The engine is currently operating on the torque curve and maximum fueling. This is a normal state when the engine is operating at maximum fueling on the torque curve.

37). Momentary Engine Override

The engine speed is being momentarily overwritten by a device such as an automatic transmission. This state should only be active during shifting events.

38). Noise Control Derate

The injection timing is being adjusted to reduce engine noise. Excessive amount of time in this state could be caused by a failed barometric air pressure sensor.

39). OBD Fueling Derate

An OBD system fault is active and is currently limiting the engine torque and the speed output. Check for active fault codes or conditions causing the derate.

40). Out Of Gear

The ECM has detected the transmission is in neutral or the clutch has been disengaged.

41). Partial Throttle Limit State

The industrial hybrid governor is controlling engine. This is a normal state when the industrial hybrid governor feature is enabled.

42). Powertrain Protection Derate

The engine's torque output is currently limited by the power train protection feature. Please verify the Powertrain Protection adjustable parameter settings.

43). Primary/ Secondary

This is a normal state when the multi-unit synchronization feature is active.

44). PTO

The engine speed is currently operating in Power Take Off Mode and being controlled by the Power Take Off feature.

45). PTO Derate

The engine torque output is limited in Power Take Off mode. Check for active fault codes causing the Power Take Off derate.

46). Road Speed Governor State

The vehicle's maximum speed is currently being limited by the Road Speed Governor setting. Check the adjustable parameter settings for tire size, rear axle ratio, transmission tail shaft gear teeth, and maximum vehicle speed.

47). Setup For Dynamometer

The electronic control system has been configured so that engine performance testing can be done on a dynamometer without restrictions on Engine Speed, Power and Torque.

48). Shutdown

The engine is in the process of being shut down. The key switch has been turned off, but engine speed has not yet reached zero rpm.

49). Top2 Derate

The engine torque is limited by the Eaton Top 2 transmission. This state should only be active during a Top 2 transmission shifting event.

50). Top2 Speed

The engine speed is limited by the Eaton Top 2 transmission. This state should only be active during a Top 2 transmission shifting event.

51). Top2 Torque

The engine torque is limited by the Eaton Top 2 transmission. This state should only be active during a Top 2 transmission shifting event.

52). Torque Rate Limit

A fuel system fault is active and is currently limiting the engine torque or speed output. Check for charge air leaks in the system.

53). Turbocharger Fuel Control State

The engine torque output has been limited to reduce the engine exhaust temperature. Check for charge air leaks in the system.

54). Turbocharger Speed Derate

The engine torque output has been limited to reduce the turbocharger speed. Check for high altitude operating conditions.

55). Turbocharger Surge Limit

The turbocharger surge limit has been exceeded. Check the turbocharger for correct operation.

56). Vehicle Acceleration Management State

The vehicle acceleration rate is being limited by the Acceleration Management feature. Please verify the vehicle acceleration adjustable parameter settings.

57). Vehicle Speed Sensor Diagnostic

The engine speed is limited by the Maximum Engine Speed without Vehicle Speed Source feature. Please verify the Maximum Engine Speed without Vehicle Speed Source parameter settings.

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