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| Illustration 1 | g00651815 |
Caterpillar Monitoring System (1) Main display module. (2) Quad Gauge Module. (3) Alert indicators. (4) Display area. (5) Gauges. | |
The self-test verifies that the main display module and the display modules are operating properly. The main display module performs an automatic self-test when the key start switch is turned from the OFF position to the ON position.
The internal circuits and the outputs are automatically checked. The operator must observe the outputs in order to determine if the modules and the outputs are operating properly. Thedisplay area is tested for approximately one second:
- Display area (4) shows: unit indicators, "SERV CODE" indicator, symbol for service meter and "888.X.8.8" on the six digit display area.
The main display module then goes into the normal mode of operation. The main display module can also scroll through the modes if the inputs to the operator switch, the service switch or the clear switch are grounded.
The module is operating properly if the main display module operates, as described. There is a problem with the harness code or the module is faulty if the main display module does not operate, as described. In order to check the harness code, see Testing And Adjusting, "Troubleshooting Harness Code Faults".