Cummins ISB CM550 (1990-94) Fault Code: 517 PID: 252 SPN: FMI: Fuel Pump Valve Feedback Error
Cummins ISB CM550 (1990-94) Fault Code: 524 PID: 113 SPN: 2 FMI: Switched Droop Selection Circuit
Cummins ISB CM550 (1990-94) Fault Code: 527 PID: 154 SPN: 702 FMI: 3 Dual-Output Driver A
Cummins ISB CM550 (1990-94) Fault Code: 528 PID: 93 SPN: 93 FMI: 2 Alternate (Switched) Torque Curve Switch Circuit
Cummins ISB CM550 (1990-94) Fault Code: 529 PID: SID 051 SPN: 703 FMI: 3 Dual-Output Driver B
Cummins ISB CM550 (1990-94) Fault Code: 599 PID: SID 025 SPN: 640 FMI: 14 Auxiliary Commanded Dual Output Shutdown - Special Instructions
Cummins ISB CM550 (1990-94) Fault Code: 768 PID: SID 009 SPN: 923 FMI: 11 Output Device Driver (Trransmission Shift Modulation)
Cummins ISB CM550 (1990-94) Fault Code: 779 PID: SID 051 SPN: 703 FMI: 11 OEM Input - Engine Protection
Cummins ISB CM550 (1990-94) Fault Code: 2559 PID: SPN: 1845 FMI: 4 Transmission ECU to ECM Communication - Abnormal Update Rate
Cummins ISB CM550 (1990-94) Fault Code: 111 PID: SID 254 SPN: 629 FMI: 12 Engine Control Module - critical internal failure. Error internal to the ECM related to memory hardware failures or internal ECM voltage supply circuits.