Yamaha 2007 XP500 Service Manual page 379

Fault code Part
56 ECU
Immobilizer system indicator light fault code indication
Digit of 10 : Cycles of "1" sec. ON and 1.5 sec. OFF.
Digit of "1" : Cycles of 0.5 sec. ON and 0.5 sec. OFF.
Example: fault code 52
Symptom
Undefinition code is
received.
8-64
IMMOBILIZER SYSTEM
Cause
Noise interference or dis-
connected lead/cable.
Action
Check the wire
G
harness and con-
nector.
Replace the main
G
switch/immobi-
lizer unit.
Replace the ECU.
G