Yamaha YZF-R1 Series Service Manual page 788

→ Go to step 4.
NO
→ If there is a malfunction, repair it and connect the coupler securely.
4. Wire harness continuity
• Disconnect the ABS ECU fuse "1", ABS solenoid fuse "2" and ABS ECU coupler "3".
• Open circuit check
Between ABS ECU fuse holder and ABS ECU cou-
pler
Between ABS solenoid fuse holder and ABS ECU
coupler
Is resistance 0 Ω?
YES
→ Go to "Short circuit check"
NO
→ Replace the wire harness.
• 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 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
red/black–red/black
blue/white–blue/white
1
2
red/black–ground
blue/white–ground
red/black–any other coupler terminal
blue/white–any other coupler terminal
B
B/W
B
9-291
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
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
57_ABS