Yamaha MT-09 2021 Service Manual page 602

Between radiator fan motor relay "1" and igni-
tion fuse 1 holder "3"
Between radiator fan motor relay "1" and ECU
coupler "2"
3
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Turn the main switch to "ON", 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 9-4.
Ground short circuit check "A"
Between radiator fan motor relay "1" and ground
Lines short circuit check "B"
Radiator fan motor relay "1"
ECU coupler "2"
red–red
green/yellow–green/yellow
1
R
R/B
R G/Y
green/yellow–ground
red–ground
green/yellow–any other coupler terminal
red–any other coupler terminal
green/yellow–any other coupler terminal
9-172
P0480
2
Y/R P/B O/G Gy/R O
Lg/R L/B G/B R/B B
R/L G/Y B
R/G Y/R Y/B L/W R/L B/W B/W