G3500 A3 Engines Caterpillar

The Electronic Control Module (ECM) monitors the operating parameters of the engine. The ECM can initiate responses if a specific engine parameter exceeds an acceptable range. Three possible responses may be available for each parameter: WARNING, DERATE and SHUTDOWN. Some of the responses are not available for some of the parameters. Use the Caterpillar Electronic Technician (ET) to perform the following activities for the monitoring system:

• Parameter programming

• Response configuration

• Set delay times

The default settings for the parameters are programmed at the factory. To accommodate unique applications and sites, some of the parameters may be reprogrammed with Cat ET. The screens of Cat ET provide guidance for the changing of trip points.

Note: Some parameters require no password in order to be changed. Other parameters can be changed with customer passwords. Some of the parameters are protected by factory passwords. There are some parameters that cannot be changed.

Changing the Settings of the Monitoring System

Use the following procedure to change settings of the parameters:

1. Select the "Service/Monitoring System" screen on Cat ET.

2. Highlight the desired parameter. Then click the "Change" button in the lower left corner of the screen.

   The "Change Monitor System" screen will appear.

3. Change the "State" of the parameter.

4. Set the "Trip Point" and the "Delay Time" according to the "Allowed Values" that are displayed in the lower half of the screen.

5. Click the "OK" button.

   If a password is required, the "Enter Passwords" screen will appear. Enter the correct passwords and then click the "OK" button.

   Note: If a factory password is required, the "Enter Factory Passwords" screen will appear. Refer to Troubleshooting, "Factory Passwords" for information that is related to obtaining factory passwords.

   The new settings will be effective immediately.

Default Settings of the Monitoring System

Examples of the default settings for the parameters are listed in Table 1. The values may have changed. Use the Cat ET to determine the programming for your engine. Many of the items can be reprogrammed in order to accommodate the requirements of individual sites.

Table 1

Default Settings of the Programmable Monitoring System
Parameter	System Response	State	Security Level Password	Trip Point	Range	Delay in Seconds	Range of the Delay in Seconds
E004 Engine Overspeed Shutdown	Shutdown	On	Factory	1750 rpm	1200 to 2160 rpm	0	0
E015 High Engine Coolant Temperature Derate	Derate	Off	Customer	111 °C	80 to 129 °C	20	1 to 60
E016 High Engine Coolant Temperature Shutdown	Shutdown	On		113 °C
E017High Engine Coolant Temperature Warning	Warning	On		109 °C
E019 High Engine Oil Temperature Shutdown	Shutdown	On	Factory	104 °C	85 to 104 °C
E020 High Engine Oil Temperature Warning	Warning	On	Customer	102 °C	80 to 102 °C
E025 High Inlet Air Temperature Derate (Low Engine Load)	Derate	Off	Customer	100 °C	32 to 100 °C
E025 High Inlet Air Temperature Derate (High Engine Load)
E026 High Inlet Air Temperature Shutdown (Low Engine Load)	Shutdown	On		70 °C
E026 High Inlet Air Temperature Shutdown (High Engine Load)				80 °C
E027 High Inlet Air Temperature Warning (Low Engine Load)	Warning			69 °C	32 to 85 °C
E027 High Inlet Air Temperature Warning (High Engine Load)					32 to 100 °C
E038 Low Engine Coolant Temperature Warning				5 °C	5 to 80 °C
E042 Low System Voltage Shutdown	Shutdown	On	Read Only	18 VDC	18 to 24 VDC	10	1 to 60
E043 Low System Voltage Warning	Warning			20 VDC		20
E050 High System Voltage Warning				34 VDC	18 to 34 VDC
E053 Low Fuel Pressure Warning			Customer	105 kPa	100 to 135 kPa	10
E096 High Fuel Pressure				135 kPa
E127 Engine Oil Filter Diff Pressure Low Warning		On	Customer	35 kPa	7 to 80 kPa	10	1 to 60
E128 Engine Oil Filter Diff Pressure Low Shutdown	Shutdown		Factory	7 kPa
E129 Engine Oil Filter Diff Pressure High Warning	Warning		Customer	103 kPa	80 to 138 kPa
E130 Engine Oil Filter Diff Pressure High Shutdown	Shutdown		Factory	138 kPa
E135 Low Jacket Water Pressure Shutdown		This item cannot be programmed.
E337 High Engine Oil to Engine Coolant Diff Temp	Warning	On	Customer	14 °C	0 to 20 °C	20	1 to 60
	Shutdown	On	Factory	20 °C

Separate timers are used in the ECM for each response that is associated with a parameter. If a trip point is reached, the timer for that event is started.

For example, the warning for "High Engine Coolant Temperature E017(1)" can be set to 95 °C with a five second delay. The timer starts counting if the coolant temperature reaches 95 °C. If the temperature is not reduced to less than 95 °C within 5 seconds, the event becomes active and the event is logged.

Conditions for Parameters

Some of the programmable parameters are dependent on the status of an ECM output before the parameters are allowed to function. Some of the parameters are allowed to function after the crank terminate relay has been energized for more than 30 seconds. Other parameters are allowed to function after the output for the fuel control relay is energized. Some parameters are not dependent upon any conditions.

The conditions are designed to eliminate false events during start-up if the customer has programmed a delay time to zero. The conditions are listed in Table 2.

Table 2

Conditions for Activation for Monitoring the Parameters
Parameter	Condition
Low System Voltage	None
High Engine Coolant Temperature	The crank terminate relay is energized for more than 30 seconds.
Low Engine Coolant Temperature	None
Engine Overspeed	None
High Engine Oil Temperature	The crank terminate relay is energized for more than 30 seconds.
High Oil Filter Differential Pressure
Low Oil Filter Differential Pressure
High Fuel Temperature
Low Fuel Pressure	The fuel control relay is energized.
High Engine Oil to Engine Coolant Differential Temperature	The crank terminate relay is energized for more than 30 seconds.
Low Gas Fuel Differential Pressure	The fuel control relay is energized.
High Gas Fuel Differential Pressure
High System Voltage	None
High Inlet Air Temperature at Low Engine Load	The crank terminate relay is energized for more than 30 seconds.
High Inlet Air Temperature at High Engine Load
High Fuel Pressure	The fuel control relay is energized.
Low Oil Pressure	The run relay is energized.
Low Jacket Water Pressure	The crank terminate relay is energized for more than 30 seconds.
High Jacket Water Inlet Pressure	The crank terminate relay is energized for more than 30 seconds.
Driven Equipment Start Inhibit	None
Low Engine Pre-Lube Pressure Start Inhibit	None
Engine Overload	The crank terminate relay is energized for more than 10 seconds.
Unexpected Engine Shutdown	The crank terminate relay is energized.
Customer Fault	None
Driven Equipment Shutdown Requested	The crank terminate relay is energized.
Detonation	None

Use care when you program the trip points and the delay times. Ensure that the response of the ECM is correct for the application. The monitoring system will accept any settings within the ranges.

The trip point for a shutdown may be programmed to activate before the warning. In that case, the engine will shut down and the warning will not be activated.