Self-Diagnosis Fault Code Indication - Yamaha VMAX 2009 Service Manual

4. Check the entire immobilizer sys-
tem wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-73.
OK ↓
• Check the condition of the each im-
mobilizer system circuits.
• Refer to "SELF-DIAGNOSIS FAULT
CODE INDICATION" on page 8-79.
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 2 and the immobilizer system indicator light flashes at the same time. The pattern of flashing
also shows the fault code.
Fault
Part
code
51 IMMOBILIZER
UNIT
52 IMMOBILIZER
UNIT
53 IMMOBILIZER
UNIT
NG →
Symptom
Code cannot be
transmitted be-
tween the key and
the immobilizer unit.
Codes between the
key and immobilizer
unit do not match.
Codes cannot be
transmitted be-
tween the ECU and
the immobilizer unit.
8-79
IMMOBILIZER SYSTEM
Properly connect or repair the immobilizer
system wiring.
Cause
1. Radio wave interfer-
ence caused by ob-
jects around the keys
and antennas.
2. Immobilizer unit mal-
function.
3. Key malfunction.
1. Signal received from
other transponder
(failed to recognize
code after ten con-
secutive attempts).
2. Signal received from
unregistered stan-
dard key.
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.
Action
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.
1. Place the immo-
bilizer unit at
least 50 mm
away from the
transponder of
other vehicles.
2. Register the
standard key.
1. Check the wire
harness and
connector.
2. Replace the
main switch/im-
mobilizer unit.
3. Replace the
ECU.