Yamaha YZF-R1 2020 Service Manual page 814

• Short circuit check
TIP
Disconnect the ABS ECU related connectors before checking.
Refer to "PARTS CONNECTED TO THE ABS ECU" on page 9-4.
Ground short circuit check "A"
Between IMU coupler "1" and ground
Between ABS ECU coupler "3" and ground
Lines short circuit check "B"
IMU coupler
Joint coupler "2"
ABS ECU coupler
A
1
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 3.
NO
→ Replace the wire harness.
3. Defective IMU
• Replace the IMU, and check again.
B
B/W
B
9-319
blue/white–ground
blue/black–ground
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
1
3
Gy/B L Y G R/B B L/W
L/W B/W
R/W B
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
91_ABS