Yamaha YZF-R1 Series Service Manual page 707

Is the coupler condition normal?
YES
→ Go to step 4.
NO
a. Connect the coupler securely or 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 4.
4. Wire harness continuity.
• Disconnect the main switch coupler "1", ECU coupler "2", relay unit coupler "3" and sidestand switch
coupler "4".
• Open circuit check
Between main switch coupler and ECU coupler
Between main switch coupler and relay unit coupler
Between relay unit coupler and sidestand switch
coupler
3
4
Br/W
L/B B
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 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 "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.
1
L/W R/W L R/L
L/Y L/B
L/R L/W R/W L/B L/Y Sb B/Y Sb/W
blue/yellow–blue/yellow
blue/black–blue/yellow
blue/black–blue/black
2
L/B
L/W
9-210
P1601
P/W P V L L/R Gy
B/Y Gy/G Br/W B/L W W/B
Gy/Y G/W G Gy/B W/L
L/Y L/W