Yamaha TMAX 2020 Service Manual page 587

3. Wire harness continuity.
• Disconnect the radiator fan motor relay coupler, ECU coupler and ignition fuse.
• Open circuit check
Between radiator fan motor relay coupler "1"
and ignition fuse holder "3"
Between radiator fan motor relay coupler "1"
and ECU coupler "2"
3
Is resistance 0 ?
YES
 Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Push the ON/start switch, and then check the condition of the DTC using the malfunction mode
of the YDT.
Is it in the "Recovered" condition?
YES
 Go to step 6, and complete the service.
NO
 Go to "Short circuit check".
• Short circuit check
TIP
Disconnect the ECU related connectors before checking.
Refer to "PARTS CONNECTED TO THE ECU" on page 9-3.
Ground short circuit check "A"
Between radiator fan motor relay coupler "1"
and ground
Lines short circuit check "B"
Radiator fan motor relay coupler "1"
ECU coupler "2"
red/white–red/white
yellow/red–yellow/red
1
Br/B
L
R/W Y/R
yellow/red–ground
red/white–ground
yellow/red–any other coupler terminal
red/white–any other coupler terminal
yellow/red–any other coupler terminal
9-113
P0480
2
Y/R B/G O
Y/W G/B R/B B
R/L Y/R B
R Y/W L/Y R/L B B