26SI Series Alternator – Diagnostic Code List

Table 1
Module Identifier 122 Diagnostic Codes (1)    
CID 0168 Electrical System    
FMI 03 for PLVIMS and PL GSM     Voltage above normal    
FMI 04 for PLVIMS and PL GSM     Voltage below normal    
CID 0254 Electronic Control Module    
FMI 04     Voltage below normal    
FMI 12     Failed Module    
CID 0269 Sensor Power Supply    
FMI 03     Voltage above normal    
FMI 04     Voltage below normal    
CID 1250 Remote Communication Module    
FMI 09     Unable to establish communication    
CID 1251 Alternator R-Terminal    
FMI 03     Voltage above normal    
( 1 ) For troubleshooting, see the procedure with the same CID FMI.

Note: A machine ECM will self-erase a diagnostic if the diagnostic does not reappear after 100 operating hours. When this event happens, the event history screen in the EquipmentManager application will show a code that occurred 100 hours in the past that no longer shows up in Cat ET because the diagnostic has not reoccurred.

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