9-1
SELF-DIAGNOSTIC FUNCTION
EAS20437
SELF-DIAGNOSTIC FUNCTION
EAS33142
GLOSSARY
EAS32858
OUTLINE
The control unit is equipped with a self-diagnostic function in order to ensure that the system is operat-
ing normally. If this function detects a malfunction in the system, it immediately operates the system un-
der substitute characteristics and illuminates the warning light to alert the rider that a malfunction has
occurred in the system. Once a malfunction has been detected, a DTC is stored in the memory of the
control unit.
Word Description
MIL
(Malfunction indica-
tor light)
MIL is an indicator light that comes on when a control unit determines a
malfunction.
DTC
(Diagnostic trouble
code)
DTC is a code that is saved within a control unit’s memory when the control
unit determines a malfunction.
Pending DTC
(Pending diagnostic
trouble code)
Pending DTC is a code that is saved within a control unit’s memory when
the control unit detects an abnormal condition. If the abnormal condition
continues, a malfunction may be determined.
Driving cycle
Driving cycle is the duration from the main switch being turned on, OBD re-
quirements are met, and until the main switch is turned off.
FFD
(Freeze frame data)
FFD is the data of all signal sensors saved at the moment a malfunction is
determined.
Current malfunction A DTC for an unrecovered, current malfunction.
Recovered malfunc-
tion
A DTC for a previously determined but now recovered malfunction.
Pending abnormality
Abnormal condition that is detected but not yet determined to be a malfunc-
tion.
Threshold
Threshold is a point set to detect if the output from sensors are abnormal or
not.
OBD
(On-board diagnos-
tics)
Self-diagnostic system is equipped in a control unit for the emission control
system.
GST
(Generic scan tool)
Generic diagnostic tool that complies with OBD standards.
YDT
(Yamaha diagnostic
tool)
Diagnostic tool developed especially for Yamaha vehicles.
To Next Page
Loading...
