Yamaha YZF-R1 2020, Service Manual

Page: 721 / 822

P1602
9-226
• 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”
Lines short circuit check “B”
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”.
Between battery “1” and ground red–ground
Between ECU coupler “3” and ground
red/green–ground
red/white–ground
Between main switch coupler “4” and ground brown/blue–ground
ECU coupler
red/green–any other coupler terminal
red/white–any other coupler terminal
Main switch coupler brown/blue–any other coupler terminal
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.
B / L B / Y W / Y
B / G
B
B B / G
L / Y L Y / B
L / G W B / R W
R / W
Y / R
Lg / R
R / L
R / G Y / L Y / B B / W R / L B / W Sb
G / Y Sb / W Br / R Br / B
L / W
Br / Y W / L B
O P / W Gy / G
L / B G / B
O / G
R / B O / B L / R B
P / B Gy / R Y / R
Lg / R
R / L
R / G Y / L Y / B B / W R / L B / W Sb
G / Y Sb / W Br / R Br / B
L / W
Br / Y W / L B
O P / W Gy / G
L / B G / B
O / G
R / B O / B L / R B
P / B Gy / R
B / L B / Y W / Y
B / G
B
B B / G
L / Y L Y / B
L / G
W B / R W
R / W
3
3
A B
1
4
3 3
4