46933A 3 Mercury GROUND STRAP, POWERHEAD TO BOTTOM COWL

Table 1
Engine Monitoring System    
Parameter    ECM Response    Default Trip Point    Default Delay Time    Derate    Event Code    
Low Oil Pressure     Off        
Warning (1)     2 Seconds (2)         E100    
High Coolant Temperature     Off        
Warning
107 °C (225 °F)     2 Seconds         E017    
Low Coolant Temperature     Off        
Warning
70 °C (158 °F)     120 Seconds         E038    
Engine Overspeed     Off        
Warning 2300 rpm     0 Seconds         E190    
Air Inlet Restriction     Off        
Warning
6.5 kPa (26 inch of H2O)     5 Seconds         E272    
Derate
6.5 kPa (26 inch of H2O)     5 Seconds     When restriction reaches
6.5 kPa (26 inch of H2O) a 1 percent derate is activated. An additional 2 percent derate is activated for every
1 kPa (4 inch of H2O increase in restriction up to a maximum derate of 20 percent).     E031    
Altitude     Off        
Derate less than
77 kPa (11 psi)     N/A     0.75 percent reduction of rack per
1 kPa (4 inch of H2O up to a maximum 19 percent reduction of rack)     E009    
High Exhaust Temperature     Off        
Warning
750 °C (1382 °F)     30 Seconds         E173    
Derate
750 °C (1382 °F)     15 Seconds     The ECM reduces rack 2 percent every 15 seconds until the exhaust temperature falls below the trip point. The maximum derate for high exhaust temperature is 20 percent.     E021    
High Crankcase Pressure     Off        
Warning
4 kPa (16 inch of H2O)     3 Seconds         E101    
High Aftercooler Water Temperature     Off        
Warning
107 °C (225 °F)     4 Seconds         E279    
( 1 ) Refer to the oil pressure map.
( 2 ) The engine monitoring system is enabled after the engine is started. When the engine is within 50 rpm of low idle, the ECM will check the parameters. The ECM will not check the parameter for low oil pressure for an additional 10 second delay. The delay is designed to eliminate false low oil pressure warnings.Oil Pressure Map
Illustration 1 g01335906
Separate timers are used in the ECM for each response that is associated with a parameter. Once the trip point is exceeded for an action, the timer for that action is started. For example, if the high coolant temperature warning is set to 102 °C (216 °F) with a five second delay, the delay timer starts counting once the coolant temperature exceeds 102 °C (216 °F). If the coolant remained above 102 °C (216 °F) for five seconds, a warning would be issued.The engine will shut down if the trip point for a shutdown is lower than the trip point for a warning. The warning will not be activated.Once a parameter has exceeded the trip point, the parameter must drop a certain amount below the trip point before the ECM response will end.If a high coolant temperature warning is programmed to 102 °C (216 °F), the temperature must exceed the range in order for the warning to activate. The temperature must decrease below 99 °C (210 °F) for the warning to stop. The variance is the hysteresis. The following table gives the hysteresis for each parameter.210 °C (410.0000 °F)
Table 2
Parameter    Hysteresis    
Oil Pressure    
25 kPa (3.5 psi)    
High Coolant Temperature    
4 °C (8 °F)    
Low Coolant Temperature    
5 °C (10 °F)    
Overspeed     100 rpm    
Air Inlet Restriction     N/A    
Altitude     N/A    
High Exhaust Temperature    
10 °C (18 °F)    
Crankcase Pressure     N/A    
Aftercooler Water Temperature    
4 °C (8 °F)    Most