Yamaha MT-09 2021 - 15_Abs; Troubleshooting

9-279
15_ABS
EAS20662
15_ABS
EAS33040
TROUBLESHOOTING
Item
Front wheel sensor (open or short circuit)
Procedure
1. Defective coupler between the front wheel sensor 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.
2. Wire harness continuity
• Disconnect the ABS ECU coupler “1” and front wheel sensor coupler “2”.
• Open circuit check
• 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”
Is check result OK?
YES
→ Go to step 2.
NO
→ If there is a malfunction, repair it and connect the coupler securely.
Between ABS ECU coupler “1” and front wheel
sensor coupler “2”
brown–brown
yellow–yellow
Is resistance 0 Ω?
YES
→ Go to “Short circuit check”.
NO
→ Replace the wire harness.
Between ABS ECU coupler “1” and ground
yellow–ground
brown–ground
R
L/W
B
B/W
W/G
GYL
R/B
Br
L/W
G/O W/Y
LBWY L/B
YBr
2
1