Yamaha Mt 01 T 2005 Manual

IMMOBILIZER SYSTEM
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3. Main switch
4. Battery
8. Main fuse
10.ECU fuse
11.Immobilizer unit
12.Backup fuse (odometer, clock and immobilizer 
system)
29.ECU (electronic control unit)
44.Multi-function meter
46.Immobilizer system indicator light
81.Ignition fuse 

IMMOBILIZER SYSTEM
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EAS27670GENERAL INFORMATION
This vehicle is equipped with an immobilizer system to help prevent theft by re-registering codes in the 
standard keys. This system consists of the following:
a code re-registering key (with a red bow)
two standard keys (with a black bow) that can be re-registered with new codes
a transponder (installed in the red key bow)
an immobilizer unit
the ECU
an immobilizer system indicator light
The key with the red bow is used to register codes in each...

IMMOBILIZER SYSTEM
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* Accessory locks mean the seat lock and fuel tank cap.
Code re-registering key registration:
When the immobilizer unit or ECU is replaced, the code re-registering key must be registered to the 
unit.
To register a code re-registering key:
1. Turn the main switch to “ON” with the code re-registering key.
NOTE:
Check that the immobilizer system indicator light comes on for one second, then goes off. When the 
immobilizer system indicator light goes off, the code re-registering key...

IMMOBILIZER SYSTEM
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Standby mode
Standard key registration:
Standard key registration is required when a standard key is lost and needs to be replaced, or when 
the code re-registering key is re-registered after the immobilizer unit or ECU are replaced.
NOTE:
Do not start the engine with a standard key that has not been registered. If the main switch is turned 
“ON” with a standard key that has not been registered, the immobilizer system indicator light flashes to 
indicate fault code “52”. (Refer to...

IMMOBILIZER SYSTEM
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Standard key registration
Voiding the standard key code:
If a standard key has been lost, it is possible to disable its use by re-registering the remaining standard 
key. Standard key registration erases the stored standard key code from the memory, thus disabling 
the lost standard key.To re-register, refer to “Standard key registration”.
Standard key code voiding method
a. Main switch “ON”
b. Main switch “OFF”
c. LED on
d. LED off
e. Less than 5.0 s
f. Code re-registering keyg....

IMMOBILIZER SYSTEM
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EAS27700TROUBLESHOOTING
When the main switch is turned to “ON”, the immobilizer system indicator light does not come on nor 
flashes.
 
 NG →
OK ↓
 
 NG →
OK ↓
 
 NG →
OK ↓
 
 NG →
OK ↓
EAS27720SELF-DIAGNOSIS FAULT CODE INDICATION
When a system malfunction occurs, the fault code number is signaled by the immobilizer system indi-
cator light.1. Check the fuses.
(Main, ignition, backup, and ECU)
Refer to “CHECKING THE FUSES” 
on page 7-93.Replace the fuse(s).
2. Check the battery....

IMMOBILIZER SYSTEM
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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.52 IMMOBILIZER 
UNITCodes between the 
key and immobilizer 
unit do not match.1. Signal received from 
other transponder 
(failed to recognize 
code after ten 
consecutive 
attempts).
2. Signal received from 
unregistered 
standard key.1. Place the 
immobilizer unit 
at least 50 mm 
away from the...

IMMOBILIZER SYSTEM
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Example: fault code 52
a
b
a. Light on
b. Light off 

IMMOBILIZER SYSTEM
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ELECTRICAL COMPONENTS
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EAS27970
ELECTRICAL COMPONENTS
4
35
7
6
8
9
10
12
13 14 1512
11