Yamaha YZF-R1 Series Service Manual page 663

Between radiator fan motor relay and ECU coupler
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 9-3.
Ground short circuit check "A"
Between radiator fan motor relay "1" and ground
Lines short circuit check "B"
Radiator fan motor relay
ECU coupler "2"
A
1
R
R/B
R/W G/Y
Is resistance ∞ Ω?
YES
→ Go to step 4.
green/yellow–green/yellow
1
R
R/B
R/W G/Y
green/yellow–ground
red/white–ground
green/yellow–any other coupler terminal
red/white–any other coupler terminal
green/yellow–any other coupler terminal
B
1
R
R/B
R/W G/Y
9-166
P0480
2
Y/R P/W P/B O/G Gy/G O Gy/R
Lg/R L/R L/B O/B R/B G/B B
R/L G/Y Br/R Br/Y Br/B W/L Sb/W B
R/G Y/B L/W Y/L Sb R/L B/W B/W
2
Y/R P/W P/B O/G Gy/G O Gy/R
Lg/R L/R L/B O/B R/B G/B B
R/L G/Y Br/R Br/Y Br/B W/L Sb/W B
R/G Y/B L/W Y/L Sb R/L B/W B/W