Yamaha YZF-R1, Service Manual

Page: 707 / 808

P1601
9-210
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
• Short circuit check
TIP
Disconnect the ECU related connectors before checking.
Refer to “PARTS CONNECTED TO THE ECU” on page 9-3.
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.
Between main switch coupler and ECU coupler blue/yellow–blue/yellow
Between main switch coupler and relay unit coupler blue/black–blue/yellow
Between relay unit coupler and sidestand switch
coupler
blue/black–blue/black
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”.
L / R Gy L / B L P / W P V
W W / B L / W B / Y B / L Gy / G Br / W
Gy / B W / L L / W L / Y Gy / Y G / W G
L / R L / W R / W L / B L / Y B / Y Sb / W Sb
L / W Br / W L R / L R / W
L / B B
L / Y L / B
3 1
2
4