Yamaha MX775 Service Manual page 11

FUEL INJECTORS AND INTAKE
MANIFOLD .................................................4-9
REMOVING THE FUEL
INJECTORS ........................................4-11
INSTALLING THE FUEL
INJECTORS ........................................4-12
REMOVING THE MANIFOLD
ABSOLUTE PRESSURE SENSOR ....4-14
INSTALLING THE MANIFOLD
ABSOLUTE PRESSURE SENSOR ....4-14
REMOVING THE INTAKE
MANIFOLD ..........................................4-14
CHECKING THE INTAKE
MANIFOLD ..........................................4-15
INSTALLING THE INTAKE
MANIFOLD ..........................................4-15
ELECTRICAL
CIRCUIT DIAGRAM....................................5-1
FUEL INJECTION SYSTEM.......................5-3
FI DIAG TOOL INSTRUCTIONS ...........5-3
FUEL INJECTION DIAGRAM................5-9
ERROR CODE LIST............................5-10
DIAG CODE LIST ................................5-11
FUEL INJECTION SYSTEM
TROUBLESHOOTING.........................5-12
ELECTRICAL COMPONENTS.................5-25
CHECKING THE SWITCH
CONTINUITY.......................................5-27
CHECKING THE FUSES ....................5-27
CHECKING THE OIL PRESSURE
SWITCH ..............................................5-28
CHECKING MANIFOLD ABSOLUTE
PRESSURE SENSOR.........................5-29
CHECKING THE THROTTLE
POSITION SENSOR ...........................5-29
CHECKING THE CRANKSHAFT
POSITION SENSOR ...........................5-30
CHECKING THE ENGINE
TEMPERATURE SENSOR..................5-31
CHECKING THE IGNITION COILS.....5-32
CHECKING THE IGNITION SPARK
GAP .....................................................5-33
CHECKING THE SPARK PLUG
CAPS...................................................5-33
CHECKING THE STATOR COIL
ASSEMBLY ......................................... 5-34
CHECKING THE RECTIFIER/
REGULATOR ...................................... 5-35
CHECKING THE FUEL
INJECTORS........................................ 5-35
CHECKING THE STARTER MOTOR
OPERATION ....................................... 5-36
ELECTRIC STARTING SYSTEM ............. 5-37
REMOVING THE STARTER
MOTOR ............................................... 5-37
DISASSEMBLING THE STARTER
MOTOR ............................................... 5-38
CHECKING THE ARMATURE COIL... 5-39
CHECKING THE BRUSH ................... 5-40
CHECKING THE STARTER RELAY ... 5-40
ASSEMBLING THE STARTER
MOTOR ............................................... 5-40
TROUBLESHOOTING
ENGINE DOES NOT START...................... 6-1
IGNITION SYSTEM .............................. 6-1
ELECTRIC STARTING SYSTEM ......... 6-2
FUEL INJECTION SYSTEM ................. 6-2
FUEL PUMP SYSTEM.......................... 6-2
OTHER TROUBLES................................... 6-3
ENGINE STARTS BUT STALLS............ 6-3
ENGINE SPEED DOES NOT
INCREASE............................................ 6-4
ENGINE SPEED IS UNEVEN............... 6-5
THE BATTERY IS NOT CHARGED ...... 6-5
GOVERNOR OPERATION.................... 6-6
OIL PRESSURE SYSTEM ......................... 6-6
SPECIFICATIONS
GENERAL SPECIFICATIONS ................... 7-1
MAINTENANCE SPECIFICATIONS .......... 7-3
ENGINE ................................................ 7-3
ELECTRICAL ........................................ 7-7
TIGHTENING TORQUES ........................... 7-8