Yamaha MT-09 2021 - Page 602

9-172
P0480
• 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”
Lines short circuit check “B”
Between radiator fan motor relay “1” and igni-
tion fuse 1 holder “3”
red–red
Between radiator fan motor relay “1” and ECU
coupler “2”
green/yellow–green/yellow
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”.
Between radiator fan motor relay “1” and ground
green/yellow–ground
red–ground
Radiator fan motor relay “1”
green/yellow–any other coupler terminal
red–any other coupler terminal
ECU coupler “2” green/yellow–any other coupler terminal
O
Gy/RO/GP/BY/R
B R/BG/BL/BLg/R
B
G/YR/L
B/WB/WR/LL/WY/BY/RR/G
R/B
R
G/YR
1
2
3