Self-Diagnostic Function; Glossary; Outline - Yamaha TMAX 2020 Service Manual

EAS20437

SELF-DIAGNOSTIC FUNCTION

EAS33142

GLOSSARY

Word
MIL
(Malfunction indica-
tor light)
DTC
(Diagnostic trouble
code)
Pending DTC
(Pending diagnostic
trouble code)
Driving cycle
FFD
(Freeze frame data)
Current malfunction
Recovered malfunc-
tion
Pending abnormality
Threshold
OBD
(On-board diagnos-
tics)
GST
(Generic scan tool)
YDT
(Yamaha diagnostic
tool)
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.
MIL is an indicator light that comes on when a control unit determines a
malfunction.
DTC is a code that is saved within a control unit's memory when the control
unit determines a malfunction.
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 is the duration from the ON/start switch is pushed, OBD
requirements are met, and until the OFF/lock switch is pushed.
FFD is the data of all signal sensors saved at the moment a malfunction is
determined.
A DTC for an unrecovered, current malfunction.
A DTC for a previously determined but now recovered malfunction.
Abnormal condition that is detected but not yet determined to be a malfunc-
tion.
Threshold is a point set to detect if the output from sensors are abnormal or
not.
Self-diagnostic system is equipped in a control unit for the emission control
system.
Generic diagnostic tool that complies with OBD standards.
Diagnostic tool developed especially for Yamaha vehicles.
SELF-DIAGNOSTIC FUNCTION
Description
9-1