Yamaha FJR1300A - Page 539

ABS (ANTI-LOCK BRAKE SYSTEM)
8-136
• Check the insulation of the hydraulic unit solenoid circuits and the negative battery terminal.
Malfunction code 23 (Front or rear brake light switch is defective.)
1. Wire harness, ABS wire harness, and front cowling wire harness
• Check the entire anti-lock brake system wiring.
Refer to “CIRCUIT DIAGRAM (1/2)” on page 8-111 and “CIRCUIT DIAGRAM (2/2)” on page 8-113.
2. Brake light relay
• Check the brake light relay.
Refer to “CHECKING THE RELAYS” on page 8-157.
3. Brake light switches (front and rear)
• Check the brake light switches (front and rear).
Refer to “CHECKING THE SWITCHES” on page 8-149.
4. Rear brake light switch
• Check that the rear brake light switch is adjusted properly.
Refer to “ADJUSTING THE REAR BRAKE LIGHT SWITCH” on page 3-23.
5. Wire harness, ABS wire harness, and front cowling wire harness
• Check the front and rear brake light switch monitor circuits.
• Check the green/yellow lead for continuity between “1” and “2” of the front brake light switch monitor
circuit.
• Check the brown/black lead for continuity between “3” and “4” of the rear brake light switch monitor
circuit.
R/W
W/GW/LW/Y
R/WR/W
W
W
W/B
Br/B
W/L
Br/W
B
B
B/W
G/R
G/Y
W/Y
Lg
R/B
B
W/G
W/L
W/Y
R/L
Y/G
Sb
B2
L/W
R/W
11
12
1
2
3
5
4
6
13
15
9
7
14
8
10
11.ABS ECU
12.Hydraulic unit
13.Front brake solenoid
14.Rear brake solenoid
15.Unified brake system solenoid
W
W
W/B
Br/B
W/L
Br/W
B
B
B/W
G/R
G/Y
W/Y
Lg
R/B
B
W/G
W/L
W/Y
R/L
Y/G
Sb
B2
L/W
R/W
Y/G
G/Y
Br
Br/B
7
9
8
3
1
6
2
4
5
5. ABS ECU
6.
Front brake light switch
7. Brake light relay
8. Rear brake light switch
9. Tail/brake light
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