CARRIAGE & FORK AR 3531693 - Caterpillar

Troubleshooting Procedures
Go to the procedure that corresponds to the CID and FMI that has been indicated. These procedures are used only for maintenance events (CID and FMI) that originate from the MSS. These procedures are used for CID's that have an MID of 124.If the MID is not for the MSS, see the Module Identifier chart on the Electrical System Schematic for the machine that is being serviced. Once you have determined the electronic control modules that detected the event, refer to the Service Manual for that control for troubleshooting information. The Service Manual modules for each control are part of the machine Service Manual.Diagnostic Codes
Table 2
Component Identifier (CID)
Machine Security System (MID 124)    
CID/FMI    Description    
CID 0168 System Voltage    
FMI 00     Voltage above normal    
FMI 01     Voltage below normal    
CID 0248 Cat Data Link    
FMI 12     Cat Data Link    
CID 0817 ECM Internal Backup Battery    
FMI 02     Real Time Clock not running or abnormal update (Battery OK)    
FMI 04     Voltage below normal    
CID 1391 MSS Output Driver No. 1    
FMI 03     Short to battery    
FMI 04     Short to ground    
CID 1392 MSS Output Driver No. 2    
FMI 03     Short to battery    
FMI 04     Short to ground