Yamaha N MAX GPD150-A 2015 Service Manual page 407

Fault code No. 21
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Defective hydraulic unit assembly
Fault code No. 24
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Defective signaling system (brake light or
brake light switch)
2 Defective coupler between the signaling
system (brake light or brake light switch)
and the hydraulic unit assembly
3 Open or short circuit in the wire harness
between the signaling system (brake light
or brake light switch) and the hydraulic
unit assembly
4 Defective hydraulic unit assembly
Fault code No. 31
TIP
Turn the main switch to "OFF" before disconnecting or connecting a coupler.
Fault code No.
Item
Symptom
Order Item/components and probable cause
1 Blown ABS solenoid fuse
ABS (ANTI-LOCK BRAKE SYSTEM)
21
Hydraulic unit assembly (defective solenoid drive circuit)
Solenoid drive circuit in the hydraulic unit assembly is open or short-
circuited.
Check or maintenance job
Replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM)" on page
4-61.
24
Brake light switch or brake light
Brake light signal is not received properly while the vehicle is travel-
ing (Brake light circuit, or front or rear brake light switch circuit).
Check or maintenance job
Check the brake light switches.
Refer to "CHECKING THE SWITCHES" on page 8-95.
• 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.
• Between front brake light switch connector and rear
brake light switch connector.
(Green/Yellow–Green/Yellow)
• Between ABS ECU coupler and rear brake light switch
connector.
(Yellow–Yellow)
If the above items were performed and no malfunctions
were found, replace the hydraulic unit assembly.
Refer to "ABS (ANTI-LOCK BRAKE SYSTEM)" on page
4-61.
31
Hydraulic unit assembly (abnormal ABS solenoid power supply)
Power is not supplied to the solenoid circuit in the hydraulic unit as-
sembly.
Check or maintenance job
Check the ABS solenoid fuse. If the ABS solenoid fuse
is blown, replace the fuse and check the wire harness.
Refer to "CHECKING THE FUSES" on page 8-99.
8-82