Yamaha 2012 TMAX XP500A, Service Manual

Page: 458 / 530

IMMOBILIZER SYSTEM
8-83
Immobilizer system indicator light fault code indication
Units of 10: Cycles of on for 1 second and off for 1.5 seconds.
Units of 1: Cycles of on for 0.5 second and off for 0.5 second.
Example: fault code 52
54 IMMOBILIZER
UNIT Codes transmitted
between the ECU
(engine control unit)
and the immobilizer
unit do not match. Noise interference or dis-
connected lead/cable.
1. Interference due to
radio wave noise.
2. Disconnected com-
munication harness.
3. Immobilizer unit mal-
function.
4. ECU (engine control
unit) failure.
(The ECU (engine
control unit) or immo-
bilizer unit was
replaced with a used
unit from another
vehicle.)
1. Register the
code re-register-
ing key.
2. Check the wire
harness and con-
nector.
3. Replace the
main switch/
immobilizer unit.
4. Replace the ECU
(engine control
unit).
55 IMMOBILIZER
UNIT Key code registra-
tion malfunction. Same standard key was
attempted to be regis-
tered two consecutive
times. Register another
standard key.
56 ECU (engine
control unit) Unidentified code is
received. Noise interference or dis-
connected lead/cable. 1. Check the wire
harness and con-
nector.
2. Replace the
main switch/
immobilizer unit.
3. Replace the ECU
(engine control
unit).
Fault
code
Part Symptom Cause Action
a
b
a. Light on
b. Light off