MBE 900 & MBE 4000 EGR – Section 4.4 Engine Protection

Section 4.4
Engine Protection

When the DDEC System on an MBE engine detects a problem PID or SID, it will derate performance or shut down the engine to prevent damage.‪

The following active fault codes can limit the engine speed:‪

• PID 100 indicates that the Engine Oil Pressure reads low or there is a problem with the Engine Oil Pressure sensor data.
• SID 21 indicates a problem with the Crankshaft Position Sensor data or a mismatch between the Crankshaft Position Sensor and Camshaft Position Sensor signals.

The following active fault codes can limit the engine torque output:‪

• PID 105 indicates that the Intake Air Temperature reads high or there is a problem with the Intake Air Temperature data.
• PID 110 indicates that the Engine Coolant Temperature reads high or very high or there is a problem with the oil pressure sensor data.
• SID 146 indicates that the EGR Temperature reads too high or too low, that the EGR Valve is not responding; or there is a bad EGR System component.

The following conditions can limit the engine torque output to its current setting:‪

• SID 21 indicates a problem with the Crankshaft Position Sensor data or a mismatch between the Crankshaft Position Sensor and Camshaft Position Sensor signals.
• The DDEC-ECU is reading the EGR Temperature but the EGR Temperature is not enabled in the DDEC-ECU fuel maps.

The following conditions can shut down the engine when enabled in the DDEC-VCU:‪

• Shutdown can be enabled if Engine Coolant Temperature reads high. The default setting is enabled .
• Shutdown can be enabled if Engine Coolant Level reads low. The default is disabled .
• Shutdown can be enabled if Engine Oil Pressure reads low. The default is enabled .

Note: The Low Engine Oil Level fault cannot be enabled on a DDEC system of a NAFTA MBE engine because the engine oil level sensor is not offered in the NAFTA market.