Yamaha YZF-R1 2020 Service Manual page 712

• Open circuit check
Between ECU coupler and joint coupler
Between joint coupler and IMU coupler
Between ECU coupler and IMU coupler
Between ignition fuse holder and IMU coupler
4
*. Joint coupler for YZF-R1
**. Joint coupler for YZF-R1M
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
a. Replace the wire harness.
b. Turn the main switch to "ON", then to "OFF", and back to "ON".
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 and IMU related connectors before checking.
Refer to "PARTS CONNECTED TO THE ECU" on page 9-3.
Ground short circuit check "A"
Between ECU coupler "1" and ground
Between IMU coupler "3" and ground
2
*
L/W L/W L/W L/W L/W L/W L/B L/B L/B L/B L/B L/B
**
L/W L/W L/W L/W L/W L/W L/W
L/B L/B L/B L/B L/B L/B L/B
blue/white–blue/white
blue/black–blue/black
blue/white–blue/white
blue/black–blue/black
black/white–black/white
red/white–red/white
3
blue/white–ground
blue/black–ground
blue/white–ground
blue/black–ground
red/white–ground
9-217
1
Y / R P / W P / B Gy / G O / G Gy / R
Lg / R L / R O / B L / B G / B R / 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
1
L/B Y/L P/W P V L
L/W Gy/G Br/W
B/Y B/L
L/Y L/W Gy/Y G/W G
P1600
O
B
B / W
L/R Gy
W W/B
Gy/B W/L