Yamaha Vmax VMX17C 2009 Service Manual page 460

2. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-21.
OK ↓
Replace the ECU, meter assembly 1
or meter assembly 2.
The shift timing indicator light fails to come on.
1. Check that the shift timing indicator
light is set to come on and that the
brightness level of the light is ad-
justed properly.
Refer to "FEATURES" on page 1-2.
OK ↓
2. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-21.
OK ↓
This circuit is OK.
The speedometer fails to operate.
1. Check the rear wheel sensor.
Refer to "MAINTENANCE OF THE
REAR WHEEL SENSOR AND
SENSOR ROTOR" on page 4-24.
OK ↓
2. Check the entire speed sensor wir-
ing.
Refer to TIP.
OK ↓
Replace the hydraulic unit assembly,
ECU, meter assembly 1 or meter as-
sembly 2.
TIP
Repair or replace if there is an open or short circuit.
• Between rear wheel sensor coupler and ABS ECU coupler.
(white–white)
(black–black)
• Between ABS ECU coupler and ECU coupler.
(white/yellow–white/yellow)
• Between ECU coupler and meter assembly 2 coupler.
(yellow/blue–yellow/blue)
SIGNALING SYSTEM
NG →
Properly connect or repair the signaling
system wiring.
NG →
Replace the meter assembly 1.
NG →
Properly connect or repair the signaling
system wiring.
NG →
Replace the rear wheel sensor.
NG →
Properly connect or repair the speed sen-
sor wiring.
8-27