Yamaha R15 2022 Service Manual page 332

ABS (ANTI-LOCK BRAKE SYSTEM) ........................................................8-101
CIRCUIT DIAGRAM .............................................................................8-101
ABS COUPLER LOCATION CHART ...................................................8-103
MAINTENANCE OF THE ABS ECU ....................................................8-104
ABS TROUBLESHOOTING OUTLINE .................................................8-104
BASIC INSTRUCTIONS FOR TROUBLESHOOTING .........................8-105
BASIC PROCESS FOR TROUBLESHOOTING ..................................8-107
[A] CHECKING THE ABS WARNING LIGHT .......................................8-108
[A-1] ONLY THE ABS WARNING LIGHT FAILS TO COME ON ..........8-108
[A-2] ALL INDICATOR LIGHTS FAIL TO COME ON ...........................8-108
[A-3] THE ABS WARNING LIGHT COMES ON ...................................8-108
[A-4] ONLY THE ABS ECU FAILS TO COMMUNICATE
(The select unit screen does not appear.) ...........................................8-109
[A-5] ABS ECU AND FI ECU FAIL TO COMMUNICATE
(Cannot connect due to a tool error.) ...................................................8-109
[B-1] MALFUNCTION ARE CURRENTLY DETECTED .......................8-109
[B-2] DIAGNOSIS USING THE FAULT CODES ..................................8-109
[B-3] DELETING THE FAULT CODES .................................................8-136
[C-1] FINAL CHECK .............................................................................8-136
ELECTRICAL COMPONENTS ...................................................................8-137
CHECKING THE SWITCHES ..............................................................8-139
CHECKING THE BULBS AND BULB SOCKETS ................................8-141
CHECKING THE FUSES .....................................................................8-142
REPLACING THE ECU (engine control unit) .......................................8-142
REMOVING THE ECU (engine control unit) ........................................8-142
INSTALLING THE ECU (engine control unit) .......................................8-143
CHECKING AND CHARGING THE BATTERY ....................................8-143
CHECKING THE RELAYS ...................................................................8-146
CHECKING THE DIODES ....................................................................8-147
CHECKING THE SPARK PLUG CAP ..................................................8-147
CHECKING THE IGNITION COIL ........................................................8-148
CHECKING THE IGNITION SPARK GAP ............................................8-148
CHECKING THE CRANKSHAFT POSITION SENSOR .......................8-149
CHECKING THE LEAN ANGLE SENSOR ...........................................8-149
CHECKING THE STARTER MOTOR OPERATION ............................8-149
CHECKING THE STATOR COIL .........................................................8-150
CHECKING THE RECTIFIER/REGULATOR .......................................8-150
CHECKING THE HORN .......................................................................8-151
CHECKING THE FUEL SENDER ........................................................8-151
CHECKING THE FUEL METER ...........................................................8-151
CHECKING THE SPEED SENSOR .....................................................8-152
CHECKING THE RADIATOR FAN MOTOR ........................................8-152
CHECKING THE COOLANT TEMPERATURE SENSOR ....................8-152
CHECKING THE THROTTLE BODY SENSOR ASSEMBLY ...............8-153
CHECKING THE FID (FAST IDLE SOLENOID) ..................................8-153
CHECKING THE VVA SOLENOID .......................................................8-153
CHECKING THE FUEL INJECTOR .....................................................8-154