Yamaha XVS950CU 2014, Service Manual

Page: 497 / 580

IMMOBILIZER SYSTEM
7-106
EAS27721
SELF-DIAGNOSIS FAULT CODE INDICATION
When a system malfunction occurs, the fault code number is indicated in the LCD display of meter as-
sembly 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 be-
tween the key and
the immobilizer unit. 1. Radio wave interfer-
ence caused by ob-
jects 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 an-
tennas.
2. Replace the
main switch/im-
mobilizer 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
away from the
transponder of
other vehicles.
2. Register the
standard key.
53 IMMOBILIZER
UNIT Codes cannot be
transmitted be-
tween the ECU and
the immobilizer unit. Noise interference or
disconnected lead/ca-
ble.
1. Interference due to
radio wave noise.
2. Disconnected com-
munication harness.
3. Immobilizer unit mal-
function.
4. ECU malfunction.
1. Check the wire
harness and
connector.
2. Replace the
main switch/im-
mobilizer unit.
3. Replace the
ECU.
54 IMMOBILIZER
UNIT Codes transmitted
between the ECU
and the immobilizer
unit do not match. Noise interference or
disconnected lead/ca-
ble.
1. Interference due to
radio wave noise.
2. Disconnected com-
munication harness.
3. Immobilizer unit mal-
function.
4. ECU failure.
(The ECU or immobi-
lizer unit was re-
placed with a used
unit from another ve-
hicle.)
1. Register the
code re-register-
ing key.
2. Check the wire
harness and
connector.
3. Replace the
main switch/im-
mobilizer unit.
4. Replace the
ECU.
55 IMMOBILIZER
UNIT Key code registra-
tion malfunction. Same standard key was
attempted to be regis-
tered two consecutive
times. Register another
standard key.