Yamaha RS90GTZ Service Manual page 412

Check the main fuse and ignition fuse.
Refer to "FUSE INSPECTION" in CHAPTER 2.
OK FAULTY
Check the battery.
Refer to "BATTERY INSPECTION" in CHAPTER 2.
OK OUT OF SPECIFICATION
Check the engine stop switch and main switch.
Refer to "IGNITION SYSTEM".
OK FAULTY
Check the speed sensor.
OK FAULTY
Check the signal system wiring.
Refer to "CIRCUIT DIAGRAM".
OK FAULTY
Correct the connection and/or replace the
speedometer unit and/or ECU.
SPEEDOMETER DOES NOT OPERATE.
8-46
SIGNAL SYSTEM
Replace the main fuse and/or ignition fuse.
Replace or charge the battery.
Refer to "BATTERY INSPECTION" in CHAP-
TER 2.
Replace the right handlebar switch and/or
main switch.
Replace the speed sensor.
Properly connect or repair the signal system
wiring.
ELEC