Yamaha Fz1n Service Manual

FUEL PUMP SYSTEM
8-77
EAS27570
TROUBLESHOOTING
If the fuel pump fails to operate.
NOTE:
 Before troubleshooting, remove the following part(s):
1 Rider and passenger seat
2 Fuel tank
3 Air filter caseNG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
1 Check the fuses.
(Main, ignition and fuel injection 
system)
Refer to CHECKING THE FUSES 
on page 8-97. Replace the fuse(s).
2 Check the battery. Refer to CHECKING AND 
CHARGING THE BATTERY on 
page 8-97.  Clean the battery terminals.
...

FUEL PUMP SYSTEM
8-78 

IMMOBILIZER SYSTEM
8-79
EAS27640
IMMOBILIZER SYSTEM
EAS27650
CIRCUIT DIAGRAM 

IMMOBILIZER SYSTEM
8-80
1. Main switch
4. Fuse (backup)
5. Immobilizer unit
6. Fuse (main)
7. Battery
23.ECU
41.Immobilizer indicator
46.Multi function meter
78.Fuse (ignition) 

IMMOBILIZER SYSTEM
8-81
EAS27670
GENERAL 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 (which is installed in each key bow)
 An immobilizer unit
 The ECU
 An immobilizer system indicator light
The key with the red bow is used to register...

IMMOBILIZER SYSTEM
8-82
* Accessory locks mean the seat lock, fuel tank cap or the helmet holder.
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...

IMMOBILIZER SYSTEM
8-83
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 standared key that has not been regi stered, the immobilizer system indicator light 
flashes to indicate fault code “52”. (Refer...

IMMOBILIZER SYSTEM
8-84
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 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
a. Main switch “ON”
b. Main switch “OFF”
c. LED on
d. LED off
e. Less than 5.0 s
f. Code re-registering...

IMMOBILIZER SYSTEM
8-85
EAS27700
TROUBLESHOOTING
When the main switch is turn “ON”, the indicator light does not come on or flashing.
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
EAS27720
SELF-DIAGNOSIS FAULT CODE INDICATION
When the system failure occurred, the error code numb er is indicated in the immobilizer system indi-
cator light blinks at the same time. The pattern of blinking also shows the error code. 1 Check the fuses.
(Main, ignition and backup)
Refer to CHECKING THE FUSES 
on page 8-97. Replace the...

IMMOBILIZER SYSTEM
8-86
Immobilizer system indicator light error 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.52
IMMOBILIZER 
UNIT
Codes do not match 
between the key and 
immobilizer unit. 1 Disturbed by other 
transponder.
Failed to verify continu-
ally for ten times.
2 Unregistered sub key  was used. 1 Place the immobi-
lizer unit away 
more than 50 mm 
from the transpon-
der of other vehi-
cle.
2 Register the stan-
dard key....