Yamaha YZF-R1 2020 Service Manual page 721

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 7, 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 battery "1" and ground
Between ECU coupler "3" and ground
Between main switch coupler "4" and ground
Lines short circuit check "B"
ECU coupler
Main switch coupler
A
1
4
Is resistance ∞ Ω?
YES
→ Go to step 6.
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 7, and complete the service.
3
Y / R P / W P / B Gy / G O / G Gy / R O
Lg / R L / R O / B L / B G / B R / B B
R / L G / Y Br / R Br / B Br / Y Sb / W W / L B
R / G Y / B L / W Y / L Sb R / L B / W B / W
3
L/Y L Y/B R/W
W W L/G B/R
B/G B B/G
B/L B B/Y W/Y
red–ground
red/green–ground
red/white–ground
brown/blue–ground
red/green–any other coupler terminal
red/white–any other coupler terminal
brown/blue–any other coupler terminal
B
3
Y / R P / W P / B Gy / G
Lg / R L / R O / B L / B G / B
R / L G / Y Br / R Br / B Br / Y Sb / W
R / G Y / B L / W Y / L Sb
4
9-226
3
O / G Gy / R O
L/Y L
R / B B
L/G
W W
W / L B
B/G
R / L B / W B / W
B/L B B/Y
P1602
Y/B R/W
B/R
B B/G
W/Y