Yamaha XP500 Service Manual page 305

Malfunction
code
Defective operation of the ABS motor is
detected. (ABS motor keeps running and will
not stop.)
34
Front wheel will not recover from the locking
tendency even though the signal is continuously
transmitted from the ECU (ABS) to release the
hydraulic state (when the battery voltage is nor-
41
mal).
Rear wheel will not recover from the locking
tendency even though the signal is continuously
transmitted from the ECU (ABS) to release the
hydraulic state (when the battery voltage is nor-
42
mal).
Front wheel will not recover from the locking
tendency even though the signal is continuously
transmitted from the ECU (ABS) to release the
hydraulic state (when the battery voltage is
51
low).
Rear wheel will not recover from the locking
tendency even though the signal is continuously
transmitted from the ECU (ABS) to release the
hydraulic state (when the battery voltage is
52
low).
Present mal- ECU (ABS) may be malfunctioning
function (test
always indi-
cates 12 V)
*1 Malfunction code 11 is indicated if the rear wheel rotates for more than 20 seconds with the front wheel
stopped.
NOTE:
_
Malfunction code 15 (front wheel sensor) or 16 (rear wheel sensor) is displayed if a defective con-
nection to either the front or rear sensor is detected whether or not the vehicle is ridden.
ANTI-LOCK BRAKE SYSTEM (XP500A)
Problem Check point
• Fail-safe relay
• Wire harness (ABS system's circuit)
• ABS motor circuit
• Brake dragging
• Hydraulic unit operation test 2
(Refer to [D-6-3-2].)
• Front wheel brake line
• Brake dragging
• Hydraulic unit operation test 2
(Refer to [D-6-3-2].)
• Rear wheel brake line
• Brake dragging
• Hydraulic unit operation test 2
(Refer to [D-6-3-2].)
• Front wheel brake line
• Battery voltage
• Brake dragging
• Hydraulic unit operation test 2
(Refer to [D-6-3-2].)
• Rear wheel brake line
• Battery voltage
• Wire harness (ABS system's circuit)
(test coupler circuits)
• ECU (ABS) (Replace)
4 - 107
CHAS
Reference
[C-5-9] Mal-
function code
34
(page 4-111)
[C-5-10] Mal-
function code
41
(page 4-112)
[C-5-11] Mal-
function code
42
(page 4-113)
[C-5-12] Mal-
function code
51
(page 4-115)
[C-5-13] Mal-
function code
52
(page 4-115)
[D-1] Mainte-
nance of the
ECU (ABS)
(page 4-116)