Yamaha MBK XMAX 2014 Service Manual page 343

2. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM (for
YP125R)" on page 8-23 and "CIR-
CUIT DIAGRAM (for YP125RA)" on
page 8-25.
OK ↓
Replace the ECU or meter assembly.
The speedometer fails to operate (for YP125R).
1. Check the speed sensor.
Refer to "CHECKING THE SPEED
SENSOR (for YP125R)" on page
8-146.
OK ↓
2. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM (for
YP125R)" on page 8-23 and "CIR-
CUIT DIAGRAM (for YP125RA)" on
page 8-25.
OK ↓
Replace the ECU or meter assembly.
The speedometer fails to operate (for YP125RA).
1. Check the front wheel sensor.
Refer to "MAINTENANCE OF THE
FRONT WHEEL SENSOR AND
SENSOR ROTOR (for YP125RA)"
on page 4-21.
OK ↓
2. Check the entire wiring.
Refer to TIP.
OK ↓
Replace the hydraulic unit assembly,
ECU or meter assembly.
TIP
Repair or replace if there is an open or short circuit.
• Between front wheel sensor coupler and ABS ECU coupler.
(white–white)
(black–black)
• Between ABS ECU coupler and ECU coupler.
(white–white)
NG →
Properly connect or replace the wire har-
ness.
NG →
Replace the speed sensor.
NG →
Properly connect or replace the wire har-
ness.
NG →
Replace the front wheel sensor.
NG →
Properly connect or repair the wiring.
8-30
SIGNALING SYSTEM