Yamaha YZF-R1 Series Service Manual page 772

EAS20691
31_ABS
EAS33321
TROUBLESHOOTING
Hydraulic unit assembly (defective ABS solenoid power circuit)
Procedure
1. Blown ABS solenoid fuse
• Check the ABS solenoid fuse.
Refer to "CHECKING THE FUSES" on page 8-41.
Is check result OK?
YES
→ Go to step 2.
NO
→ Replace the fuse and check the wire harness.
2. 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
→ Go to step 3.
NO
→ If there is a malfunction, repair it and connect the coupler securely.
3. Wire harness continuity
• Disconnect the ABS solenoid fuse "1" and ABS ECU coupler "2".
• Open circuit check
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
blue/white–blue/white
1
9-275
2
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