PIN 2168495 - Caterpillar

Note: The service codes that are listed in Table 1 are for the power train ECM. The information of the service code for the ECM is transferred via the CAT data link to the Caterpillar Monitoring System. When the Caterpillar Monitoring System is in service mode, the service codes for the ECM are shown on the display area of the Caterpillar Monitoring System. The module identifier (MID) identifies the ECM that is sending the service code. The MID for the power train ECM is 081. This Service Manual Module will review service codes with a MID of 081. The MID of the other electronic control modules on a particular machine are listed on the Electrical System Schematic. Troubleshooting information for those service codes can be found in the service manual for that system.Failure Mode Identifier (FMI) Codes
Table 2
FMI No.    Description    
0     Data valid but above normal operational range    
1     Data valid but below normal operational range    
2     Data erratic, intermittent, or incorrect    
3     Voltage above normal or shorted high    
4     Voltage below normal or shorted low    
5     Current below normal or open circuit    
6     Current above normal or grounded circuit    
8     Abnormal frequency, pulse width, or period    
9     Abnormal update    
10     Abnormal rate of change    
11     Failure mode not identifiable    
12     Bad device or component    
13     Out of calibration    FMI 00 - Data valid but above normal operational rangeEvery electronic control system sets a high limit for the expected operating range of a signal. The limit includes ranges such as high converter temperatures. A sensor that is still functioning but sending a signal above the expected limit will cause the FMI 00 code to be stored.Example - A pulse width modulated sensor is not expected to generate a valid signal over 80 percent of the duty cycle. A sensor could generate a signal that is above 80 percent. The sensor is still functioning but the signal is now above the expected signal limit.FMI 01 - Data valid but below normal operational rangeEvery electronic control system sets a low limit for the expected operating range of a signal. The limit includes ranges such as low engine oil pressure. A sensor that is still functioning but sending a signal below the expected limit will cause a FMI 01 to be stored.Example - Most pulse width modulated sensors are not expected to generate a valid signal that is less than 5 percent of the duty cycle. A sensor could generate a signal that is below 5 percent. The sensor is still functioning but the signal is now above the expected signal limit.FMI 02 - Data erratic, intermittent, or incorrect.FMI 02 occurs when signal data from a component is present. Then, one of the following events happens to the data.
The data disappears.
The data becomes unstable.
The data becomes invalid.Data can be correct at times and