On-Board Diagnostics Exam 2025
Questions and Answers
Active fault - ANSWER✔✔-A fault that is currently taking place and uninterrupted in
action.
Fault mode identifier (FMI) - ANSWER✔✔-A type of failure detected in the SPN, PID,
or SID.
Historical fault - ANSWER✔✔-A fault that took place at one time but that is now
corrected and no longer active.
Incipient fault - ANSWER✔✔-A fault that is the result of system or component
deterioration.
Intermittent fault - ANSWER✔✔-A fault that is not on-going and can be both active and
historical.
On-board diagnostics - ANSWER✔✔-The simplest, most familiar definition of ________
is the diagnostic function of electronic control systems to identify or self-diagnose
system faults and report fault codes.
Questions and Answers
Active fault - ANSWER✔✔-A fault that is currently taking place and uninterrupted in
action.
Fault mode identifier (FMI) - ANSWER✔✔-A type of failure detected in the SPN, PID,
or SID.
Historical fault - ANSWER✔✔-A fault that took place at one time but that is now
corrected and no longer active.
Incipient fault - ANSWER✔✔-A fault that is the result of system or component
deterioration.
Intermittent fault - ANSWER✔✔-A fault that is not on-going and can be both active and
historical.
On-board diagnostics - ANSWER✔✔-The simplest, most familiar definition of ________
is the diagnostic function of electronic control systems to identify or self-diagnose
system faults and report fault codes.
