Yamaha XP500 Service Manual page 304

• [C-5] Diagnosis by the malfunction code
Malfunction codes are used to determine the malfunctions that have occurred. (Refer to "[B-4] ABS
malfunction check using the ABS self-diagnosis (past malfunction)" and "[B-5] ABS malfunction
check using the ABS self-diagnosis (present malfunction)".) The malfunction codes are explained in
the following table.
NOTE:
_
Record all of the malfunction codes displayed and check the check points.
Malfunction
code
Front wheel sensor signal is not received prop-
erly.
11
*1
Rear wheel sensor signal is not received prop-
erly.
12
Incorrect signal is detected by the front (13) or
rear (14) wheel sensor.
13 (front) 13
14 (rear)
14
No continuity in the front or rear wheel sensor
circuits
15
15 (front)
16 (rear)
16
Hydraulic unit solenoid circuit is broken or short-
circuited.
21
Disconnection is detected on the system of fail-
safe relay and hydraulic unit solenoid coupler.
31
Defective operation of the fail-safe relay is
detected.
32
Defective operation of the ABS motor is
detected. (ABS motor stops and will not rotate.)
33
ANTI-LOCK BRAKE SYSTEM (XP500A)
Problem Check point
• Installation of the front wheel sensor
• Front wheel sensor lead and coupler
• Wire harness (ABS system's circuit)
• Front wheel sensor rotor
• Installation of the rear wheel sensor
• Rear wheel sensor lead and coupler
• Wire harness (ABS system's circuit)
• Rear wheel sensor rotor
• Wheel sensor installation
• Wheel sensor housings
• Wheel sensor rotors
• Continuity of sensor circuits
• Wire harness (ABS system's circuit)
• Connection of sensor coupler
• Wire harness (ABS system's circuit)
• Hydraulic unit solenoid coupler
• Hydraulic unit solenoid
• Wire harness (ABS system's circuit)
• Fail-safe relay circuit
• Hydraulic unit solenoid coupler
• Fail-safe relay
• Wire harness (ABS system's circuit)
• Wire harness (ABS system's circuit)
• ABS motor coupler
• Fail-safe relay
• ABS motor circuit
4 - 106
CHAS
Reference
[C-5-1] Mal-
function code
11
(page 4-108)
[C-5-2] Mal-
function code
12
(page 4-108)
[C-5-3] Mal-
function codes
13 (front
wheel) and 14
(rear wheel)
(page 4-109)
[C-5-4] Mal-
function codes
15 (front wheel
sensor) and
16 (rear wheel
sensor)
(page 4-109)
[C-5-5] Mal-
function code
21
(page 4-109)
[C-5-6] Mal-
function code
31
(page 4-110)
[C-5-7] Mal-
function code
32
(page 4-110)
[C-5-8] Mal-
function code
33
(page 4-111)