The SPN 639 FMI 9 fault code equals Cummins 285 fault code. This translates into - Abnormal Update Rate. What that means is that the ECM either did not get the information fast enough or the information did not arrive at all. To learn more about this fault code, just continue to read our article. It has the information you want to know about so.. FMI 9 CAT Fault Code. Description: High Altitude Derate. Cause : This sub type is used for control module Internal Failures that cannot be assigned to a specific sub type.this process determines the absence of a power source or ground, then perform a continuity test to check the integrity of the wiring, ignition switch, and other components.
SPN 563,FMI 9. The description says abnormal update rate between the ABS and J1939. this means there is a communication problem with your ABS module on the J1939 data link circuit. Thoroughly inspect your wiring and connector pins for any corrosion or damage resulting in a short or open circuit. and check for any faulty fuses or relays or.. Section 52.3 SPN 625/FMI 9. This fault is typically erratic data or the CAN propriety data link has failed between the MCM and the CPC. Note: The following diagnostics pertain to faults received from the MCM and /or the CPC. Check as follows: