Yamaha XSR 900 2022 Service Manual page 479

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC
15 Front wheel sensor (open
or short circuit)
16 Rear wheel sensor (open
or short circuit)
21 Hydraulic unit assembly
(ABS ECU) (defective so-
lenoid drive circuit)
31 Hydraulic unit assembly
(ABS ECU) (defective
ABS solenoid power cir-
cuit)
Item
Open or short circuit is de-
tected in the front wheel
sensor.
Open or short circuit is de-
tected in the rear wheel
sensor.
Solenoid drive circuit in
the hydraulic unit assem-
bly (ABS ECU) is open or
short-circuited.
Power is not supplied to
the solenoid circuit in the
hydraulic unit assembly
(ABS ECU).
Symptom
9-73
Check point
• Defective coupler be-
tween the front wheel
sensor and the hydraulic
unit assembly (ABS
ECU)
• Open or short circuit in
the wire harness be-
tween the front wheel
sensor and the hydraulic
unit assembly (ABS
ECU)
• Defective front wheel
sensor or hydraulic unit
assembly (ABS ECU)
• Defective coupler be-
tween the rear wheel
sensor and the hydraulic
unit assembly (ABS
ECU)
• Open or short circuit in
the wire harness be-
tween the rear wheel
sensor and the hydraulic
unit assembly (ABS
ECU)
• Defective rear wheel
sensor or hydraulic unit
assembly (ABS ECU)
• Defective hydraulic unit
assembly (ABS ECU)
• Blown ABS solenoid fuse
• Defective coupler be-
tween the battery and the
hydraulic unit assembly
(ABS ECU)
• Open or short circuit in
the wire harness be-
tween the battery and the
hydraulic unit assembly
(ABS ECU)
• Defective hydraulic unit
assembly (ABS ECU)