Yamaha FJR13AEV(C) Service Manual page 620

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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) (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.
2. Brake light relay
• Check the brake light relay.
Refer to "CHECKING THE RELAYS" on page 8-221.
3. Brake light switches (front and rear)
• Check the brake light switches (front and rear).
Refer to "CHECKING THE SWITCHES" on page 8-211.
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 3-30.
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.
G/Y Br Br/B
1
5. ABS ECU
6. Front brake light switch
7. Brake light relay
Malfunction code 24 (Brake light is defective.)
1. Wire harness and ABS wire harness
• Check the entire anti-lock brake system wiring.
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.
2. Brake light relay
• Check the brake light relay.
Refer to "CHECKING THE RELAYS" on page 8-221.
3. Wire harness and ABS wire harness
• Check the brake light monitor circuit.
• Check the yellow/green lead for continuity between "1" and "2" of the brake light monitor circuit.
ABS (ANTI-LOCK BRAKE SYSTEM)
6
G/Y
Y/G
7
5
Br/B
8
3
9
8-149
4
W
W
W/B Br/B
W/L
B
B B/W G/R G/Y W/Y Lg
2
R/B B W/G W/L W/Y
R/L
Y/G Sb B2
L/W
R/W
8. Rear brake light switch
9. Tail/brake light
Br/W

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