Yamaha TMAX TECH MAX 2020 - Page 391

8-36
SIGNALING SYSTEM
TIP
Replace if there is an open or short circuit.
• Between rear wheel sensor coupler and ABS ECU coupler.
(Black–Black)
(White–White)
• Between ABS ECU coupler and ECU (engine control unit) coupler.
(White/Yellow–White/Yellow)
• Between ECU coupler and meter assembly coupler.
(Light green/Blue–Light green/Blue)
(Light green/White–Light green/White)
The speedometer fails to operate.
1. Check the rear wheel sensor.
Refer to “MAINTENANCE OF THE
REAR WHEEL SENSOR AND
SENSOR ROTOR” on page 4-34.
NG Replace the rear wheel sensor.
OK
2. Check the entire wheel sensor wir-
ing.
Refer to TIP.
NG
Properly connect or replace the wire har-
ness.
OK
Replace the hydraulic unit assembly,
ECU and/or meter assembly.
The tachometer fails to operate.
1. Check the crankshaft position sen-
sor.
Refer to “CHECKING THE
CRANKSHAFT POSITION SEN-
SOR” on page 8-104.
NG Replace the stator coil.
OK
2. Check the entire signaling system
wiring.
Refer to “CIRCUIT DIAGRAM” on
page 8-29.
NG
Properly connect or replace the wire har-
ness.
OK
Replace the ECU and/or meter as-
sembly.
The ambient temperature meter fails to operate.
1. Check the intake air temperature
sensor.
Refer to “CHECKING THE INTAKE
AIR TEMPERATURE SENSOR”
on page 8-111.
NG
Replace the intake air temperature sen-
sor.