PINION 3333056 - Caterpillar

Functions of the Lamps
Shutdown Lamp
Lamp check - When the keyswitch is turned to ON, the lamp will come on for 2 seconds. The lamp will then go off unless there is an active warning.Flashing - The lamp will be flashing when the engine has been derated as a result of an active diagnostic code. An example of an active diagnostic code is "System Voltage High".On - The lamp will be on when the shutdown level in the engine protection strategy has been reached. The "Warning" lamp will also be on.Warning Lamp
Lamp check - When the keyswitch is turned to ON, the lamp will come on for 2 seconds. The lamp will then go off unless there is an active warning.Flashing - The lamp will be flashing when a "warning" or a "warning and derate" is active. An example is low oil pressure.On - The lamp will be on when the shutdown level has been reached. The "Shutdown" lamp will also be on.Wait to Start Lamp
Lamp check - When the keyswitch is turned to ON, the lamp will come on for 2 seconds. The lamp will then go off unless "Wait to Start" is active.On - The lamp is on during a "Wait to Start" period.Low Oil Pressure
Lamp check - When the keyswitch is turned to ON, the lamp will come on for 2 seconds. The lamp will then go off unless there is an active warning.On - The lamp will come on when a low oil pressure event is detected. The "Warning" lamp and the "Shutdown" lamp may also come on.Maintenance Indicator Lamp
Lamp check - The lamp will come on for 2 seconds. The lamp will then go off unless the PTO mode is active.On - The lamp will come on when scheduled maintenance is required.Color of Lamps
Typically, the "Shutdown" lamp is colored red and the "Warning" lamp is colored amber. The other lamps are optional.Operation of the Indicator Lamps
Table 1
Warning Lamp
(Alert Lamp)     Shutdown Lamp
(Action Lamp)     Lamp State     Description of the Indication     Engine State    
On     On     Lamp Check     When the keyswitch is in the ON position, the lamps come on for 2 seconds and the lamps will then go off.     The keyswitch is in the ON position but the engine has not yet been cranked.    
Off     Off     No Faults     With the engine in operation, there are no active warnings, diagnostic codes, or event codes.     The engine is operating with no detected faults.    
On     Off     Active Diagnostic     The warning lamp coming on during engine operation indicates that an active diagnostic code