Yamaha YZF-R1 Series Service Manual page 774

EAS20692
33_ABS
EAS33322
TROUBLESHOOTING
Item
Hydraulic unit assembly (abnormal ABS motor power supply)
Procedure
1. Blown ABS motor fuse
• Check the ABS motor 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 starter relay coupler (ABS motor fuse) "1" and ABS ECU coupler "2".
• Open circuit check
Between starter relay coupler (ABS motor fuse) and
ABS ECU coupler
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
→ Replace the wire harness.
• Short circuit check
red/white–red/white
2
1
L/W
R/W
R/W L/W
R/W
9-277
Gy/B L Y G R/B B L/W
B/W
B
G/O W/L L B W W L/B
33_ABS