Yamaha 2012 TMAX XP500A, Service Manual

Page: 457 / 530

IMMOBILIZER SYSTEM
8-82
EAS27721
SELF-DIAGNOSIS FAULT CODE INDICATION
When a system malfunction occurs, the fault code number is indicated in the LCD display of the
meter assembly and the immobilizer system indicator light flashes at the same time. The pattern of
flashing also shows the fault code.
Fault
code
Part Symptom Cause Action
51 IMMOBILIZER
UNIT Code cannot be
transmitted between
the key and the
immobilizer unit. 1. Radio wave interfer-
ence caused by
objects around the
keys and antennas.
2. Immobilizer unit mal-
function.
3. Key malfunction.
1. Keep magnets,
metal objects,
and other immo-
bilizer system
keys away from
the keys and
antennas.
2. Replace the
main switch/
immobilizer unit.
3. Replace the key.
52 IMMOBILIZER
UNIT Codes between the
key and immobilizer
unit do not match. 1. Signal received from
other transponder
(failed to recognize
code after ten con-
secutive attempts).
2. Signal received from
unregistered stan-
dard key.
1. Place the immo-
bilizer unit at
least 50 mm
(1.97 in) away
from the tran-
sponder of other
vehicles.
2. Register the
standard key.
53 IMMOBILIZER
UNIT Codes cannot be
transmitted between
the ECU (engine
control unit) and the
immobilizer unit. 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) malfunction.
1. Check the wire
harness and con-
nector.
2. Replace the
main switch/
immobilizer unit.
3. Replace the ECU
(engine control
unit).