Fault Code Guide

Failure Mode Identifiers
FMI J1939 Description J1587 Description
00 Data valid but above normal operational range–Most severe
level
Data valid but above normal operational range
(engine overheating)
01 Data valid but below normal operational range–Most severe
level
Data valid but below normal operational range
(engine oil pressure too low)
02 Data erratic, intermittent, or incorrect Data erratic, intermittent, or incorrect
03 Voltage above normal or shorted high Voltage above normal or shorted high
04 Voltage below normal or shorted low Voltage below normal or shorted low
05 Current below normal or open circuit Current below normal or open circuit
06 Current above normal or grounded circuit Current above normal or grounded circuit
07 Mechanical system not responding or out of adjustment Mechanical system not responding properly
08 Abnormal frequency, pulse width, or period Abnormal frequency, pulse width, or period
09 Abnormal update rate Abnormal update rate
10 Abnormal rate of change Abnormal rate of change
11 Root cause not known Failure mode not identifiable
12 Bad intelligent device or component Bad intelligent device or component
13 Out of Calibration Out of Calibration
14 Special Instructions Special Instructions
15 Data valid but above normal operational range–Least severe
level
Reserved for future assignment by the SAE
Subcommittee
16 Data valid but above normal operational range–Moderately
severe level
—
17 Data valid but below normal operational range–Least severe
level
—
18 Data valid but below normal operational range–Moderately
severe level
—
19 Received network data in error —
31 Condition Exists —
Table 3, Failure Mode Identifiers
Bulkhead Module 54.12
Bulkhead Module Fault Code Information
Business Class M2 Workshop Manual, Supplement 22, September 2012410/8