Yamaha YZF-R1 2020 Service Manual page 717

Lines short circuit check "B"
Relay unit coupler
ECU coupler "2"
Sidestand switch coupler "3"
A
1
Br/W L/W R/W
L/R L/W R/W L/B L/Y
Is resistance ∞ Ω?
YES
→ Go to step 5.
NO
a. Replace the wire harness.
b. Turn the main switch to "ON", and then extend and retract the sidestand.
c. 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 step 5.
5. Defective sidestand switch.
• Execute the diagnostic mode. (Code D20)
• Shift the transmission into gear.
Sidestand retracted
Sidestand extended
Is check result OK?
YES
→ Go to step 6.
NO
a. Replace the sidestand switch.
b. Turn the main switch to "ON", and then extend and retract the sidestand.
c. 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
B
L R/L
Sb B/Y Sb/W
blue/yellow–any other coupler terminal
blue/black–any other coupler terminal
blue/yellow–any other coupler terminal
blue/black–any other coupler terminal
1
Br/W L/W R/W L R/L
L/R L/W R/W L/B L/Y Sb B/Y Sb/W
2
L/B P/W P
Y/L
L/W B/Y Gy/G Br/W
L/Y L/W Gy/Y G/W G
9-222
3
V L/R Gy
L
B/L W W/B
Gy/B W/L
ON
OFF
P1601
L/B B