Yamaha Yzf R1 2007 Manual

IMMOBILIZER SYSTEM
8-72
* 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
8-73
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
8-74
Voiding the standard key code:
If a standard key has been lost, it is possible to disable its use by re-registering the remaining stan-
dard key. Standard key registration erases the stored standard key code from the memory, thus dis-
abling the lost standard key.To re-register, refer to “Standard key registration”.
Standard key code voiding method
EAS27701
TROUBLESHOOTING
When the main switch is turned to “ON”, the immobilizer system indicator light does not come on nor...

IMMOBILIZER SYSTEM
8-75
NG→
OK↓
EAS27721
SELF-DIAGNOSIS FAULT CODE INDICATION
When a system failure occurs, the error code number is indicated in the LCD display of meter and 
the immobilizer system indicator light blinks at the same time. The pattern of blinking also shows the 
error code.4 Check the entire immobilizer sys-
tem wiring.
Refer to IMMOBILIZER SYSTEM 
on page 8-69.Properly connect or repair the immobi-
lizer system wiring.
 Check the condition of the each 
immobilizer system circuits.
...

IMMOBILIZER SYSTEM
8-76
Immobilizer system indicator light fault code indication
Digit of 10 : Cycles of 1 sec. ON and 1.5 sec. OFF.
Digit of 1 : Cycles of 0.5 sec. ON and 0.5 sec. OFF.
Example: fault code 5254 IMMOBILIZER 
UNITCodes transmitted 
between the ECU 
and the immobilizer 
unit do not match.Noise interference or dis-
connected lead/cable.
1 Interference due to 
radio wave noise.
2 Disconnected commu-
nication harness.
3 Immobilizer unit mal-
function.
4 ECU failure.
(The ECU or immobi-
lizer...

ELECTRICAL COMPONENTS
8-77
EAS27970
ELECTRICAL COMPONENTS 

ELECTRICAL COMPONENTS
8-78
1. Main switch
2. Immobilizer unit
3. Front brake light switch
4. Clutch switch
5. Fuel injection system fuse
6. Starter relay
7. Battery
8. Main fuse
9. Neutral switch
10.Rear brake light switch
11.EXUP servo motor
12.Sidestand switch
13.O
2 sensor
14.Speed sensor
15.Oil level switch
16.Ignition coil
17.Radiator fan motor
18.Rectifier/regulator
19.Horn
20.Fuse box (radiator fan motor, signaling sys-
tem, ignition, ETV, backup)
21.Fuse box (headlight) 

ELECTRICAL COMPONENTS
8-79 

ELECTRICAL COMPONENTS
8-80
1. Air temperature sensor
2. Atmospheric pressure sensor
3. Fuel pump
4. Coolant temperature sensor
5. Starting circuit cut-off relay
6. Turn signal relay
7. ECU (engine control unit)
8. Lean angle sensor
9. Crankshaft position sensor
10.Intake air pressure sensor
11.Throttle servo motor
12.Throttle position sensor (for throttle cable 
pulley)
13.Throttle position sensor (for throttle valves)
14.Cylinder identification sensor
15.Radiator fan motor relay
16.Headlight relay...

ELECTRICAL COMPONENTS
8-81
EAS27980
CHECKING THE SWITCHES