3508, 3508B, 3508C, 3512, 3512B, 3512C, 3516, 3516B and 3516C Engines Caterpillar Monitoring System Caterpillar

The Caterpillar Monitoring System notifies the operator of an immediate problem or an impending problem with various engine systems operation. Warning operation begins when the Main Display Module receives a signal that reflects an abnormal engine condition or the Main Display Module detects a problem with the control system. Switches, sensors and the engine control module (ECM) provide information to the Main Display Module. The warning information consists of the following elements.

• An open switch is provided. When a condition exceeds the trip point of the switch, the switch opens.

• A sensor signal that exceeds the limits of the trip point is provided. The Main Display Module determines the limits.

• Abnormal engine condition is detected and provided by the engine control module (ECM). The abnormal conditions are communicated over the CAT Data Link to the Main Display Module.

Note: The trip points of the monitoring system can be modified through the "ET" Electronic Service Tool.

The Main Display Module receives the information and the Main Display Module processes the information. The result of the processing is displayed on the Indicator Lamps of the Main Display Module. The Alarm sounds if an abnormal condition exists. The following items are functions of the warning indication.

• The Main Display Module will flash the appropriate Indicator Lamp. The Lamp will flash at a rate of nine times per second.

• The Main Display Module will sound the Alarm. The Alarm will be ON one second and the Alarm will be OFF for two seconds.

Use the Electronic Service Tool in order to review the Caterpillar Monitoring System trip points. For more information about Service Tool usage, see the Electronic Service Tool Guide.