Yamaha R1 Series 2015 Service Manual page 630

Fault code No.
Item
Symptom
Order Item/components and probable cause
2 Defective hydraulic unit assembly
Fault code No. 89
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Defective coupler between the meter
assembly and the hydraulic unit assembly
2 Open or short circuit in the wire harness
between the meter assembly and the
hydraulic unit assembly
3 Defective meter assembly
4 Defective hydraulic unit assembly
Fault code No. 90
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Defective coupler between the FI ECU
and the hydraulic unit assembly
69
Defective hydraulic unit assembly (defective rear pressure sensor)
Abnormality detected in pressure sensor circuit of hydraulic unit
assembly.
Check or maintenance job
Replace the hydraulic unit assembly.
Refer to "ABS (Anti-lock Brake System)" on page 4-65.
89
CAN communication (between meter assembly and hydraulic unit
assembly)
Transmitted data from the meter assembly cannot be normally
received.
Check or maintenance job
• Check the coupler for any pins that may be pulled out.
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect the cou-
pler securely.
TIP
Turn the main switch to "OFF" before disconnecting or
connecting a coupler.
Replace if there is an open or short circuit.
• Between meter assembly and joint coupler.
(blue/white–blue/white)
(blue/black–black/blue)
• Between joint coupler and ABS ECU coupler.
(blue/white–blue/white)
(blue/black–black/blue)
Replace the meter assembly.
Replace the hydraulic unit assembly.
Refer to "ABS (Anti-lock Brake System)" on page 4-65.
90
CAN communication (between FI ECU and hydraulic unit assembly)
Transmitted data from the FI ECU cannot be normally received.
Check or maintenance job
• Check the coupler for any pins that may be pulled out.
• Check the locking condition of the coupler.
• If there is a malfunction, repair it and connect the cou-
pler securely.
TIP
Turn the main switch to "OFF" before disconnecting or
connecting a coupler.
8-149
ABS (Anti-lock Brake System)