PIN 5050918 - Caterpillar

Note: This table shows the service codes for the auxiliary hydraulic ECM only. The service codes for the ECM are shown on the display area of the Caterpillar® ET. The information of the service code for the ECM is transferred via the CAT® Data Link to the Caterpillar® ET. The module identifier (MID) tells the service person the ECM that is sending the service code. The MID for the auxiliary hydraulic ECM is No. 106. This Service Manual is used only for service codes with a MID of 106.Detailed FMI Explanations
The FMI information for the auxiliary hydraulic ECM is explained in the following list.FMI 00 - Operating Range Is Above Normal. Every electronic control system sets a high limit for the expected operating range of the signal. The limit includes signals that are above the expected range. A sensor that is still working but sending a signal above the expected limit will cause an FMI 00 to be stored. Some possible causes of FMI 00 are listed here:
Signal above normal (High pressure or high temperature)
Calibration is needed. FMI 13 is the preferred code.For example, a certain PWM sensor is expected to generate a valid signal over 80 percent duty cycle. If the sensor generates a signal of 81 percent duty cycle, the sensor is still working but the signal is above the expected signal limits. FMI 01 - Operating Range Is Below Normal. Every electronic control system sets a low limit for the expected operating range of the signal. The limit includes signals that are under the expected range. A low engine oil pressure signal from a working sensor could produce this FMI. A sensor that is still working but sending a signal below the expected limit will cause an FMI 01 to be stored. Some possible causes of FMI 01 are listed here:
The signal is below normal. (The voltage, pressure, or temperature is low.)
Timing is retarded. For example, a certain PWM sensor is not expected to generate a PWM signal below 5 percent duty cycle even with zero air pressure. If the sensor generates a signal of 4 percent duty cycle with the engine shutdown, the sensor is still working but the signal is below the expected signal limits. FMI 02 - Data Is Erratic, Intermittent Or Incorrect. Signal data that is received from a component is valid. The data that is received from the component has become intermittent or erratic. Data can be correct sometimes and the data may be incorrect at other times. The communication that occurs between electronic controls also relates to this condition. Some possible causes of FMI 02 are listed here:
Loose connections in switches, harness, etc.
Intermittent/erratic signal
Programmed data has changed.
Noisy signal
The signal is out of the expected range. FMI 00 or FMI 01 is the preferred code.
A failed power or ground connection to the ECM
Failed ECMFMI 03 - "Voltage Above Normal Or Shorted High". The voltage that is received from a component is higher than the expected value that is identified by