Troubleshooting Chart - Yamaha XT660R Service Manual

EAS00904

TROUBLESHOOTING CHART

The engine trouble warning light may not come on even if the engine operation is not normal.
The engine trouble warning light comes on.
Check the fault code number displayed on the meter.
Identify the system with the malfunction.
Refer to "FAIL-SAFE ACTION TABLE".
Identify the probable cause of the malfunction.
Refer to "Diagnostic monitoring code table".
Check and repair the probable cause of the malfunc-
tion.
Fault code No. is indi-
cated.
Check and repair. Refer
to "TROUBLESHOOT-
ING DETAILS". Moni-
tor the operation of the
sensors and the actua-
tors in the diagnostic
mode. Refer to "Diag-
nostic mode table".
Perform the ECU reinstatement action.
Refer to "Restore method" in "TROUBLESHOOTING
DETAILS".
Set the main switch to "OFF", set it back to "ON", and
then check if the fault code number is still displayed
on the meter.
Erase the malfunction history.*
The malfunction history is stored even if the main switch is set to "OFF". The malfunction history must be erased in the
diagnostic mode. Refer to "Diagnostic mode table (Diagnostic code No. 62)".
* Operated when the engine trouble warning light is on.
FUEL INJECTION SYSTEM
Engine operation is not normal or the engine trouble warning light is on.
Fault code No. is not
indicated.
Check and repair.
Refer to "FAIL-SAFE
ACTION TABLE".
No fault code number displayed
The engine trouble warning light does not come on.
Check the operation of the following sensors and
actuators in the diagnostic mode. Refer to "Diagnostic
mode table".
01: Throttle position sensor (throttle angle)
07: Vehicle speed pulse
09: Fuel system voltage
21: Neutral switch
30: Ignition coil
36: Fuel injector
48: Air induction system solenoid
Malfunction
engine
Check and repair the
inner parts of the
engine.
chapter 5.
Check the engine condition.
Fault code number
displayed
Repairs completed
7 - 6
FI
OK
of the Defective sensor or
actuator
Check and repair the
corresponding
Refer to
sor or actuator.
OK NG
OK
NG
sen-
OK