Yamaha XP500 Service Manual page 444

FUEL INJECTION SYSTEM
FUEL INJECTION SYSTEM............................................................................7-1
WIRING DIAGRAM ................................................................................... 7-2
ECU (engine) SELF-DIAGNOSTIC FUNCTION........................................ 7-3
ALTERNATE INSTRUCTIONS OPERATION CONTROL
(FAIL-SAFE ACTION) ..............................................................................7-4
FAIL-SAFE ACTION TABLE ..................................................................... 7-4
TROUBLESHOOTING CHART .................................................................7-6
DIAGNOSTIC MODE ................................................................................ 7-7
TROUBLESHOOTING DETAILS ............................................................ 7-12
THROTTLE BODY......................................................................................... 7-23
CHECKING THE FUEL INJECTORS......................................................7-27
CHECKING THE THROTTLE BODY ......................................................7-27
CHECKING THE FUEL PUMP OPERATION..........................................7-27
CHECKING AND ADJUSTING THE THROTTLE POSITION
SENSOR ................................................................................................7-29
CHAPTER 7
FI