BOLT 1D4616 - Caterpillar

The Electronic Control Module (ECM) monitors the operating parameters of the engine. The master ECM can initiate responses if a specific engine parameter exceeds an acceptable range. Two possible responses may be available for each parameter: "" 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:
Select the available responses.
Program the level for monitoring.
Program delay times for each response.The default settings for the parameters are programmed at the factory. To accommodate unique applications and sites, the parameters may be reprogrammed with Cat ET. The screens of Cat ET provide guidance for the changing of trip points.Note: Some of the parameters are protected by factory passwords. Other parameters can be changed with customer passwords.Changing the Settings of the Monitoring System
Use the following procedure to change settings of the parameters:
Use Cat ET and select the "Service/Monitoring System" screen.
Highlight the desired parameter. Then click on the "Change" button in the lower left corner of the screen. The "Change Monitor System" screen will appear.
Change the "State" to "On" or "Off".
Set the "Trip Point" and the "Delay Time" according to the "Allowed Values" in the lower half of the screen.
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.The new settings will be effective immediately.Monitoring Parameters
"Low System Voltage"
The trip point for this parameter is set at the factory. The trip point cannot be changed. This parameter is always ON. This parameter cannot be turned off. If the system voltage decreases to the trip point or if the system voltage goes below the trip point, the ECM will generate a warning or a shutdown."High Engine Coolant Temperature"
The trip points for this parameter can be programmed by the customer. The shutdown response is always ON. The shutdown response cannot be turned off. If the engine coolant temperature increases to the trip point or