BALL BEARING 5P4992 - Caterpillar

The Self-Test verifies that the Main Display Module and the Gauge Cluster Modules are operating properly. The Main Display Module performs an automatic Self-Test each time that the "ECS" switch is turned from the OFF/RESET position to the AUTO position, MAN/START position or the COOLDOWN/STOP position.Note: When the "ECS" switch is in the AUTO position, the Main Display Module receives power only when the Remote START/STOP switch is in the MAN/START position or the COOLDOWN/STOP position. The internal circuits and the outputs are automatically checked. The operator must observe the outputs in order to determine whether the modules and the outputs are operating properly. The Indicator Lamps and the Display Area are tested for approximately one second.
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Typical View Of Indicator Lamps
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Display Area With All Segments ShownGauge Cluster Modules are tested for approximately three seconds.
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The needles for the Gauge Cluster Modules will jump to half scale. The needles will go back to zero, then the needles will sweep to full scale. After reaching full scale, the needles will return to showing the current conditions.The Action Alarm will sound once.The Main Display Module will then go into the Normal Mode (Mode 0) of operation.If a module does not perform the Self-Test, proceed to Testing And Adjusting, "Module - Replace".