Yamaha YZF-R1 Series Service Manual page 773

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 ABS ECU coupler "1" and ground
Lines short circuit check "B"
ABS ECU coupler
A
1
Gy/B L Y G R/B B L/W
L/W
R/W
G/O W/L L B W W L/B
Is resistance ∞ Ω?
YES
→ Go to step 4.
NO
→ Replace the wire harness.
4. Defective hydraulic unit assembly
• Replace the hydraulic unit assembly.
Refer to "ABS (Anti-lock Brake System)" on page 4-74.
blue/white–ground
blue/white–any other coupler terminal
B
B/W
B
9-276
1
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
31_ABS