7
2800 Series 0
ECM Status indicator output circuit test
Test 4
System operation The ECM has seven available outputs that indicate engine operating status:
l l l l l l l
Overspeed Coolant temperature Oil pressure Diagnostics Warning Action alert Shutdown
They can be used to drive indicator lamps or to interface with other controls. Each output provides a 0,3 Amp maximum current connection to either battery positive or battery negative when ON, and an open circuit when OFF. The DIAGNOSTICS output indicates that a fault exists on the electronic system rather than with the engine. The TIPSS-EST service tool should be used to diagnose the fault. The OVERSPEED output indicates that an overspeed fault exists. The severity of the fault is indicated by the WARNING, ACTION ALERT or SHUTDOWN lamps. The COOLANT TEMPERATURE lamp indicates a high coolant temperature fault. The severity of the fault is indicated by the WARNING, ACTION ALERT or SHUTDOWN lamps. The OIL PRESSURE lamp indicates an engine low oil pressure fault. The severity of the fault is indicated by the WARNING, ACTION ALERT or SHUTDOWN lamps. The ACTION ALERT output indicates the existence of an engine fault of sufficient severity that the engine should be shutdown. This output would normally be used by the OEM to trip the generator circuit breaker and stop the engine. ECM Status indicator output circuit schematic Note: Outputs may be used to drive lamps or relays. Refer to the wiring diagrams for full connection details. Outputs may be used to drive lamps or relays Shutdown
J1/10
ECM Shutdown lamp Output
Action Alert
J1/19
Action Alert Lamp Output
J1/20
Warning Lamp Output
J1/31
Diagnostics Lamp Output
J1/28
Oil Pressure Lamp Output
J1/29
Coolant Temperature Lamp Output
J1/30
Overspeed Lamp Output
Warning
Diagnostics
BOil Pressure
Coolant Temp
Overspeed
P1 J1
A
B+
Diagnostic Manual, TSL4247, Preliminary
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