Yamaha Fz6 N Service Manual

FUEL PUMP SYSTEM
8-58
1. Main switch
5. Fuel injection system fuse
7. Main fuse
10.Battery
11.Starting circuit cut-off relay
14.Fuel pump
22.ECU (engine control unit)
56.Engine stop switch
64.Ignition fuse 

FUEL PUMP SYSTEM
8-59
EAS27570
TROUBLESHOOTING
If the fuel pump fails to operate.
NOTE:
 Before troubleshooting, remove the following part(s):
1.Seat
2.Front cowling inner panel3
3.Fuel tankNG→
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 8-113. Replace the fuse(s).
2. Check the battery. Refer to CHECKING AND 
CHARGING THE BATTERY on 
page 8-114.  Clean the battery terminals.
 Recharge...

FUEL PUMP SYSTEM
8-60 

IMMOBILIZER SYSTEM
8-61
EAS27640
IMMOBILIZER SYSTEM
EAS27650
CIRCUIT DIAGRAM
ChB
P
G/L Y/L R/GLgB/W
G/L
Y/L
R/G
G/R
G/RLgB/W
R/B
R/LG/BR/LG/BR/LG/B
R/B R/L
G/B
R/B23R/L
R/L
R/LR/BR/L24
25
26
27
R/WBr/RR/W
Br/R
15L
Y
B/L
D
G/W
G/WD
Br/W Br/W D
P/W P/W D
B/L B/L
B/LBr/W
LB/LP/W
16
2021
B/LG/WB/L B/L
L
A
B/W A
Y/L D
YY
C
LL C
R/L
C G/B
C
R/B
B/L
22
R/L
B/L
G/WBr/WYP/WB/L
G/WBr/WYP/WB/L
18
L
L
P/W
P/W
R/B
R/L
G/B
L
B/Y
B/LY/GL
B/R
Y/B
W/Y B/L
B/L
L G/Y
R/B R/L
G/B L
B/L35
3637
37
Y/L
19Gy
B
Gy B/L
R/B
17B...

IMMOBILIZER SYSTEM
8-62
1. Main switch
4. Backup fuse
6. Immobilizer unit
7. Main fuse
10.Battery
22.ECU (engine control unit)
39.Immobilizer indicator light
44.Multi-function meter
64.Ignition fuse 

IMMOBILIZER SYSTEM
8-63
EAS27671
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 (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...

IMMOBILIZER SYSTEM
8-64
* 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
8-65
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
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...

IMMOBILIZER SYSTEM
8-66
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
8-67
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 ↓
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 t he same time. The pattern of blinking also shows the 
error code. 1. Check the fuses.
(Main, ignition and backup)...