Yamaha XT660Z 2008 Service Manual page 350

2. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM"
on page 8-19.
OK
Replace the meter assembly.
The speedometer fails to operate.
1. Check the speed sensor.
Refer to "CHECKING THE
SPEED SENSOR" on page 8-58.
OK
2. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM"
on page 8-19.
OK
The circuit is OK.
The coolant temperature warning light fails to come on.
1. Check the coolant temperature
warning light LED.
Refer to "CHECKING THE LEDS"
on page 8-47.
OK
2. Check the coolant temperature
sensor. Refer to "CHECKING
THE COOLANT TEMPERATURE
SENSOR" on page 8-57.
OK
3. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM"
on page 8-19.
OK
The circuit is OK.
Properly connect or repair the signaling
NG
system wiring.
Replace the speed sensor.
NG
Properly connect or repair the signaling
NG
system wiring.
NG
Replace the meter assembly.
Replace the coolant temperature sensor.
NG
Properly connect or repair the cooling
NG
system wiring.
8-24
SIGNALING SYSTEM