Yamaha XP500 Service Manual page 543

PART REPLACEMENT KEY REGISTRATION REQUIREMENTS
Standard key is lost
All keys have been lost
(including code re-reg-
istering key)
ECU (engine) is defec-
tive
Immobilizer unit is
defective
Main switch is defective
*2
Accessory lock is
defective
*1
Replace as a set with the main switch.
*2
Accessory locks include the fuel tank cap lock and storage compartment lock.
NOTE:
If the ECU (engine) or the immobilizer unit is replaced, both the code re-registering key and the
standard keys need to be registered with the new unit(s).
IMMOBILIZER SYSTEM
Parts to be replaced
Main
Immobilizer
switch
unit
*1
*1
Accessory
Standard ECU
lock
key (engine)
8 - 65
ELEC
Required key
*2
registration
and
key
New standard key
Code re-registering
key and standard keys
Code re-registering
key and standard keys
Code re-registering
key and standard keys
Code re-registering
key and standard keys
Not required
– +