Yamaha FJR13AEV(C) Service Manual page 619

• Front or rear wheel sensor or lead is broken.
Refer to "MAINTENANCE OF THE FRONT WHEEL SENSOR AND SENSOR ROTOR" on page
4-20, "INSTALLING THE FRONT WHEEL (FRONT BRAKE DISCS)" on page 4-22, "MAINTENANCE
OF THE REAR WHEEL SENSOR AND SENSOR ROTOR" on page 4-26, and "INSTALLING THE
REAR WHEEL (REAR BRAKE DISC)" on page 4-27.
• Front or rear wheel sensor circuit is broken.
Refer to "CIRCUIT DIAGRAM (1/2) (FJR13A)" on page 8-119, "CIRCUIT DIAGRAM (2/2) (FJR13A)"
on page 8-121, "CIRCUIT DIAGRAM (1/2) (FJR13AE)" on page 8-123, and "CIRCUIT DIAGRAM
(2/2) (FJR13AE)" on page 8-125.
• ABS wire harness is disconnected from the ABS ECU coupler terminal.
Refer to "MAINTENANCE OF THE ABS ECU" on page 8-132.
NOTE:
• Check that both the front and rear wheel sensor couplers are connected securely.
• If the vehicle is ridden after malfunction code 15 (front wheel) or 16 (rear wheel) is displayed, the mal-
function code will be overwritten from 15 to 11 (front wheel) or from 16 to 12 (rear wheel).
Malfunction code 21 (Hydraulic unit solenoid circuit is broken or short-circuited.)
1. Hydraulic unit solenoid coupler
• Check if a hydraulic unit solenoid coupler terminal is disconnected.
Refer to "ABS COUPLER LOCATION CHART" on page 8-129.
2. Hydraulic unit solenoids
• Check the solenoids (front brake, rear brake, and unified brake system) for continuity.
Refer to "MAINTENANCE OF THE HYDRAULIC UNIT" on page 8-132.
• Check the insulation between each solenoid terminal and the negative battery terminal.
Refer to "MAINTENANCE OF THE HYDRAULIC UNIT" on page 8-132.
3. ABS wire harness
• Check the white/green lead for continuity between "1" and "5" of the hydraulic unit solenoid circuit.
• Check the white/blue lead for continuity between "2" and "4" of the hydraulic unit solenoid circuit.
• Check the white/yellow lead for continuity between "3" and "6" of the hydraulic unit solenoid circuit.
• Check the red/white leads for continuity between "7" and "10", between "8" and "10", and between
"9" and "10" of the hydraulic unit solenoid circuit.
W W W/B Br/B
B B B/W G/R G/Y W/Y Lg
1
R/B B W/G W/L W/Y
Y/G Sb B2
11.ABS ECU
12.Hydraulic unit
13.Front brake solenoid
• Check the insulation of the hydraulic unit solenoid circuits and the negative battery terminal.
ABS (ANTI-LOCK BRAKE SYSTEM)
W/L Br/W
2 3
11
R/L
L/W R/W
10
8-148
R/W
12
13
14 15
W/L
W/G
W/Y
14.Rear brake solenoid
15.Unified brake system solenoid
7 8 9
R/W R/W R/W
W/Y W/L W/G
6
4 5