Yamaha XT660R Service Manual page 342

FUEL INJECTION SYSTEM
FUEL INJECTION SYSTEM............................................................................7-1
WIRING DIAGRAM ................................................................................... 7-2
ECU SELF-DIAGNOSTIC FUNCTION......................................................7-3
ALTERNATE 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 ASSEMBLY.................................................................... 7-23
CHECKING THE FUEL INJECTOR ........................................................ 7-26
CHECKING THE THROTTLE BODY ......................................................7-26
INSTALLING THE THROTTLE BODY ASSEMBLY................................7-27
CHECKING THE FUEL PUMP................................................................7-28
CHECKING AND ADJUSTING THE THROTTLE POSITION
SENSOR ................................................................................................7-29
AIR INDUCTION SYSTEM ............................................................................7-32
AIR INJECTION....................................................................................... 7-32
AIR CUT-OFF VALVE ............................................................................. 7-32
AIR INDUCTION SYSTEM DIAGRAMS.................................................. 7-33
AIR CUT-OFF VALVE ASSEMBLY......................................................... 7-34
CHECKING THE AIR INDUCTION SYSTEM..........................................7-36
CHAPTER 7
FI