iPA ALPHA MUTT - Failure Mode Identifier (FMI) Assignments

10.4 Failure Mode Identifier (FMI) Assignments
The Failure Mode Identifier, FMI, describes the type of failure detected in the subsystem identified by
the PID or SID. The FMI and either the PID or SID combine to form a given diagnostic code (see PID
194 for added clarification). The remaining failure mode identifiers would be assigned by the SAE
Truck and Bus Low Speed Communications Network Subcommittee if additional common failure
modes become detectable.
0
Data valid but above normal operational range (that is, engine overheating)
1
Data valid but below normal operational range (that is, engine oil pressure too low)
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
7
Mechanical system not responding properly
8
Abnormal frequency, pulse width, or period
9
Abnormal update rate
10
Abnormal rate of change
11
Failure mode not identifiable
12
Bad intelligent device or component
13
Out of Calibration
14
Special Instructions
15
Reserved for future assignment by the SAE Subcommittee
10-5