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

The Caterpillar Monitoring System has six different possible modes of operation. Each mode provides important information regarding the conditions of the engine. In this manual, all six modes are given a name. Also, a number represents the modes. The mode of operation is changed by holding the "CLEAR/MODE" switch down. The available modes are listed in the following chart.

Table 1

Modes Of Operation For The Main Display Module
Mode Of Operation	Mode Number
Normal	0
Numeric Readout	1
Service	2
Tattletale	3
Units	4
Harness Code	5

When power is applied, the Caterpillar Electronic Monitoring System performs a Self-Test. The Self-Test causes all of the display elements and gauges to briefly operate. After the Self-Test, the Main Display Module enters Mode 0.