Yamaha YZF-R1 2020 Service Manual page 802

Between ABS ECU coupler "3" and ground
Lines short circuit check "B"
ECU coupler
Joint coupler "2"
ABS ECU coupler
A
1
L/B
Y/L
L/W B/Y
L/Y L/W
3
Gy/B L Y G R/B B L/W
L/W
R/W
G/O W/L L B W W L/B
*. Joint coupler for YZF-R1
**. Joint coupler for YZF-R1M
Is resistance ∞ Ω?
YES
→ Go to step 2.
NO
→ Replace the wire harness.
2. Defective battery
• Recharge or replace the battery, and check again.
Refer to "CHECKING AND CHARGING THE BATTERY" on page 8-42.
3. Defective coupler between the battery and the hydraulic unit assembly
• Check the coupler for any pins that may be pulled out.
• Check the locking condition of the coupler.
TIP
Turn the main switch to "OFF" before disconnecting or connecting a coupler.
Is check result OK?
YES
P/W P V L/R Gy
L
Gy/G Br/W B/L W W/B
Gy/Y G/W G Gy/B W/L
B/W
B
blue/white–ground
blue/black–ground
blue/white–any other coupler terminal
blue/black–any other coupler terminal
blue/white–any other coupler terminal
blue/black–any other coupler terminal
blue/white–any other coupler terminal
blue/black–any other coupler terminal
B
1
L/B Y/L P/W P
L/W B/Y
L/Y L/W
3
Gy/B L Y G R/B B L/W
L/W
R/W
G/O W/L L B W W L/B
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
9-307
V L L/R Gy
Gy/G Br/W B/L W W/B
Gy/Y G/W G Gy/B W/L
B/W
B
57_ABS