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 has been registered.
2. Check that the engine can be started.
3. Register the standard key, following the instructions in the section below.
Standby mode:
To enable the immobilizer system, turn the ignition key to “OFF”. 30 seconds later, the indicator light 
will start flashing continuously in the standby flashing mode pattern for up to 24 hours. After that 
time, the indicator light will stop flashing, but the immobilizer system is still enabled.
Standby mode
Parts to be replaced
Key registration 
requirement Main switch/immo-
bilizer unit
Standard 
keyECUAcces-
sory lock* 
and key Main 
switchImmobi-
lizer unit
Standard key is lost√New standard key
All keys have been 
lost (including code 
re-registering key)√√√√Code re-registering 
key and standard 
keys
ECU is defective√Code re-registering 
key and standard 
keys
Immobilizer unit is 
defective√Code re-registering 
key and standard 
keys
Main switch is defec-
tive√√√√Code re-registering 
key and standard 
keys
Accessory lock* is 
defective√Not required
a. Main switch “ON”
b. Main switch “OFF”c. LED on
d. LED off 
						

							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 SELF-DIAGNOSIS FAULT CODE INDICATION on page 8-75).
1. Check that the immobilizer system indicator light signals the standby mode.
2. Using the code re-registering key, turn the main switch to “ON”, then “OFF”, and then remove the 
key within 5 seconds.
3. Insert the first standard key to be registered into the main switch, then turn the key to “ON” within 
5 seconds to activate the key registration mode.
NOTE:
The existing standard key code is erased from the memory when the key registration mode is acti-
vated. When the key registration mode is activated, the immobilizer system indicator light flashes 
rapidly.
4. While the indicator light is flashing, turn the main switch to “OFF”, remove the key, and within 5 
seconds, insert the second standard key to be registered into the main switch.
NOTE:
If he immobilizer system indicator light stops flashing 5 seconds after the first standard key is regis-
tered, the registration mode is deactivated. If this occurs, the second standard key cannot be regis-
tered, and steps 2 to 4 need to be repeated to register both standard keys.
5. Turn the main switch to “ON”.
NOTE:
When the indicator light goes off, the registration is complete.
6. Check that the engine can be started with the two registered standard keys.
Standard key registratione. Standby mode on
f. Standby mode off
a. Main switch “ON”
b. Main switch “OFF”
c. LED on
d. LED off
e. Less than 5.0 s
f. Code re-registering key
g. First standard key
h. Second standard key
i. Registration modeA. Registration of the second standard key is 
complete.
B. Immobilizer system indicator light stops 
flashing when the registration of the second 
standard key is complete. 
						

							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 
flashes.
NG→
OK↓
NG→
OK↓
NG→
OK↓
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. Remaining standard key
h. Registration mode
A. If the immobilizer system indicator light 
stops flashing 5 seconds after the first stan-
dard key is registered, the second standard 
key cannot be registered.
1 Check the fuses.
(Main, ignition and backup)
Refer to CHECKING THE FUSES 
on page 8-85.Replace the fuse(s).
2 Check the battery.
Refer to CHECKING AND 
CHARGING THE BATTERY on 
page 8-85. Clean the battery terminals.
 Recharge or replace the battery.
3 Check the main switch.
Refer to CHECKING THE 
SWITCHES on page 8-81.Replace the main switch/immobilizer 
unit. 
						

							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.
 Refer to SELF-DIAGNOSIS FAULT 
CODE INDICATION on page 8-75.
Fault 
codePart Symptom Cause Action
51 IMMOBILIZER 
UNITCode cannot be 
transmitted between 
the key and immobi-
lizer 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 immobilizer 
system keys away 
form the keys and 
antennas.
2 Replace the main 
switch/immobi-
lizer unit.
3 Replace the key.
52 IMMOBILIZER 
UNITCodes between the 
key and immobilizer 
unit do not match.1 Signal received from 
other transponder 
(failed to recognize 
code after ten consec-
utive attempts).
2 Signal received from 
unregistered standard 
key.1 Place the immobi-
lizer unit at least 
50 mm away from 
the transponder of 
other vehicles.
2 Register the stan-
dard key.
53 IMMOBILIZER 
UNITCodes cannot be 
transmitted between 
the ECU and the 
immobilizer unit.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 malfunction.1 Check the wire 
harness and con-
nector.
2 Replace the main 
switch/immobi-
lizer unit.
3 Replace the ECU. 
						

							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 unit was replaced 
with a used unit from 
another vehicle.)1 Register the code 
re-registering key.
2 Check the wire 
harness and con-
nector.
3 Replace the main 
switch/immobi-
lizer unit.
4 Replace the ECU.
55 IMMOBILIZER 
UNITKey code registra-
tion malfunction.Same standard key was 
attempted to be regis-
tered two consecutive 
times.Register another 
standard key.
56 ECU Undefinition code is 
received.Noise interference or dis-
connected lead/cable.1 Check the wire 
harness and con-
nector.
2 Replace the main 
switch/immobi-
lizer unit.
3 Replace the ECU. Fault 
codePart Symptom Cause Action
a. Light on
b. Light off 
						

							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 (dimmer)
17.Headlight relay (on/off) 
						

							ELECTRICAL COMPONENTS
8-81
EAS27980
CHECKING THE SWITCHES