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| Illustration 1 | g00533585 |
Tattletale Mode or Mode 3 is a tool that is used for management. The history of the engine may be found by using Mode 3. The Main Display Module records the extreme values for each engine condition that is monitored. The values come from the sensor input and the engine ECM through the CAT Data Link. The Tattletale values are updated whenever a more extreme value occurs than the value that is previously recorded. These values are ignored for a short period of time after each engine start-up. This allows the engine systems to stabilize before old values can be updated with new values.
The gauges show the highest value or the gauges show the lowest value that has been attained by the corresponding engine subsystem. The highest reading is for values that abnormally decrease.
In order to more accurately show the information that is represented on the gauges, use the "SCROLL" switch in order to advance the Display Area to the first tattletale value. The Display Area will momentarily show the system identifier "GA-X". The system identifier is then followed by the tattletale value. See the chart that is located in Systems Operation, "Numeric Readout Mode".
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| Illustration 2 | g00533586 |
Press the "SCROLL" switch again for each succeeding tattletale value. Only the system identifiers for the quad gauge electronic modules that are present are shown on the Display Area. For example, if only one quad gauge electronic module is present, system identifiers "GA-1", "GA-2", "GA-3" and "GA-4" will be shown. If an additional quad gauge electronic module is present, "GA-5", "GA-6", "GA-7" and "GA-8" will be shown. The pattern continues for additional quad gauge electronic modules. The system identifier "GA-X" precedes the value that is shown in the Display Area. In addition to the tattletale value that is shown in the Display Area, the gauge needle for the tattletale value that is displayed is active. All other gauges fall to minimum positions.
Note: While the Main Display Module is in Normal Mode, the Indicator Lamps of the Main Display Module turn ON when an abnormal condition has occurred.
Information about the Tattletale is retained until the information is cleared from the memory of the Main Display Module. Clearing all information about the Tattletale from the memory of the Main Display Module is done by pushing the "MODE/CLEAR" switch to the UP position while "- -" is displayed in the Display Area. After clearing, all information about the tattletale is reset to a nominal value and the recording of new extreme values can begin. Individual gauge tattletale values can be cleared one at a time by pushing the "MODE/CLEAR" switch to the UP while the gauge tattletale value is being displayed in the Display Area.
Note: The date, time or duration of the occurrence of the tattletale value is not recorded.