ORIFICE 2072985 - Caterpillar

System Operation Description:Use this procedure in order to determine if the circuit for the warning lamp is operating correctly.Background InformationA warning lamp is required if the "Engine Monitoring" feature is used. The warning lamp indicates an active problem with a monitored condition such as high coolant temperature. A flashing warning lamp indicates that the engine is derating power. The warning lamp will turn on for a minimum of two seconds after the engine has started in order to indicate that the lamp and the circuit are OK.Option 1 Programming the "Engine Monitoring Lamps" parameter to "Option 1" requires three lamps. P1-29 (Warning Lamp) is connected to the lamp for low oil pressure. P1-30 (Output 1) is connected to the lamp for low coolant level. P1-31 (Output 9) is connected to the lamp for high coolant temperature.If a coolant level sensor is not installed or the "Engine Monitoring Lamps" parameter is programmed to "Warning Lamp", then J1/P1:30 will function as a PTO switch on lamp output. The parameter for the "Coolant Level Sensor" must be programmed to "NO" if the sensor is not installed.When "Option 1" is programmed the following lamps will not be available:
"Warning Lamp" as J1/P1-29
"PTO Switch On Lamp" as J1/P1-30
"Change Oil Lamp" as J1/P1-30
"Fast Idle Enable Lamp" as J1/P1-31
"Wait To Start Lamp" as J1/P1-31Note: "Option 1" is not available for the "GM Truck Manufacturer".An option is available for the "GM Truck Manufacturer" configuration that allows the output for warning lamp to be configured as an output for a warning lamp for high coolant temperature. The "Engine Monitoring Lamps" parameter must be programmed to the "Warning Lamp" option for standard operation of engine monitoring. If the "Engine Monitoring Lamps" parameter is programmed to the "High Coolant Temp Warning Lamp" option, the output is used as an interface to the GM shutdown system.Operation Of Engine MonitoringWhen the Engine Control Module (ECM) detects a condition that exceeds the acceptable limits, the warning lamp turns on. Activation of the lamp depends on the existing conditions and the programming of the parameter that is associated with the condition. The lamp will activate in one of the following modes:
The lamp turns on and the lamp stays on.
The lamp will flash on and off.If the lamp turns on continuously, the engine is in warning mode. If the lamp begins to flash, the ECM has begun to derate engine speed, vehicle speed, or power.If the parameter for engine monitoring is programmed to "", the lamp will not flash. The lamp only flashes when the engine is programmed to "DERATE" or "SHUTDOWN".If the customer parameter for engine monitoring is programmed to "", to "DERATE", or to "SHUTDOWN" the lamp will turn on when a warning condition exists. The lamp will be turned on continuously while a warning condition exists.If the customer parameter for engine monitoring is programmed to "DERATE" or to "SHUTDOWN", the lamp flashes whenever engine monitoring is derating engine speed, vehicle speed, and power.If the customer parameter for engine monitoring is programmed to