Yamaha YZF-R1 2020 Service Manual page 813

EAS20671
91_ABS
EAS33301
TROUBLESHOOTING
Item
CAN communication (between IMU and hydraulic unit assembly)
Procedure
1. Defective coupler between the IMU 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 2.
NO
→ If there is a malfunction, repair it and connect the coupler securely.
2. Wire harness continuity.
• Disconnect the IMU coupler "1", joint coupler "2" and ABS ECU coupler "3".
• Open circuit check
Between IMU coupler and joint coupler
Between joint coupler and ABS ECU coupler
*. Joint coupler for YZF-R1
**. Joint coupler for YZF-R1M
Is resistance 0 Ω?
YES
→ Go to "Short circuit check".
NO
→ Replace the wire harness.
1
2
*
L/W L/W L/W L/W L/W L/W L/B L/B L/B L/B L/B L/B
**
L/W L/W L/W L/W L/W L/W L/W
L/B L/B L/B L/B L/B L/B L/B
blue/white–blue/white
blue/black–blue/black
blue/white–blue/white
blue/black–blue/black
3
9-318
91_ABS
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