CONTROL GP-HYDRAULIC HAND 4174793 - Caterpillar

Active Diagnostic Codes
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Typical Cat ET screen for active diagnostic codes
The following procedures may cause new diagnostic codes to be logged. Therefore, before any procedures are performed, make a list of all the active diagnostic codes in order to determine the system problems. Clear the diagnostic codes that were caused by the procedure, when each procedure is complete.Note: Before performing a procedure, always check all the circuit breakers. Repair the cause of any circuit breaker that is tripped.Logged Diagnostic Codes
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Typical Cat ET screen for logged diagnostic codes
A screen is provided in Cat ET for logged diagnostic codes. The screen will display diagnostic codes that are logged. Cat ET will log diagnostic codes that are intermittent. The logged diagnostic data shall include a component identifier (CID), a failure mode identifier (FMI), and a text description of the problem. Also, the logged diagnostic data shall include the number of occurrences of the problem and two time stamps. The time stamp displays the first occurrence of the problem and the time stamp displays the most recent occurrence of the problem.Diagnostics are logged in non-volatile memory. On powerup, the ECM will clear any diagnostic codes that have not been detected or active.