Yamaha Fz6 N Service Manual

8
ELECTRICAL SYSTEM
IGNITION SYSTEM....................................................................................... 8-1
CIRCUIT DIAGRAM............. ................................................................... 8-1
TROUBLESHOOTING ............................................................................ 8-3
ELECTRIC STARTING SYSTEM .................................................................. 8-5
CIRCUIT DIAGRAM................

ABS (ANTI-LOCK BRAKE SYSTEM)........................................................ 8-71
ABS CIRCUIT DIAGRAM .... ................................................................. 8-71
ABS COMPONENTS CHART ............................................................... 8-73
ABS CONNECTOR LOCATION  CHART .............................................. 8-75
ABS ECU AND ABS MOTOR RE LAY ................................................... 8-77
[D-1] MAINTENANCE OF THE ABS ECU...

CHECKING THE ENGINE OIL LEVEL GAUGE ................................. 8-125
CHECKING THE FUEL SENDER ...................................................... 8-126
CHECKING THE SPEED SENSOR ................................................... 8-126
CHECKING THE RADIATOR FAN MOTOR........................................ 8-127
CHECKING THE COOLANT TEMPERATURE SENSOR .................. 8-127
CHECKING THE THROTTLE POSITION SENSOR........................... 8-128
CHECKING THE FUEL PUMP...

IGNITION SYSTEM
8-1
EAS27090
IGNITION SYSTEM
EAS27110
CIRCUIT DIAGRAM
ChB
P
G/L Y/L R/GLgB/W
G/L
Y/L
R/GLgB/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
B/L
W/Y
W/Y B/L
B/L
L G/Y
R/B R/L
G/B L
B/L
W/Y
L
B/L
29
30 31
31
Y/L
19Gy
B
Gy B/L
28...

IGNITION SYSTEM
8-2
1. Main switch
7. Main fuse
10.Battery
11.Starting circuit cut-off relay
12.Sidestand switch
13.Neutral switch
18.Lean angle sensor
19.Crankshaft position sensor
22.ECU (engine control unit)
29.Cylinder-#1/#4 ignition coil
30.Cylinder-#2/#3 ignition coil
31.Spark plugs
45.Engine stop switch
52.Ignition fuse
59.Clutch switch 

IGNITION SYSTEM
8-3
EAS27140
TROUBLESHOOTING
The ignition system fails to operate (no spark or intermittent spark).
NOTE:
 Before troubleshooting, remove the following part(s):
1.Seat
2.Fuel tank
3.Side cowlingsNG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
1. Check the fuses.
(Main and ignition)
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 or...

IGNITION SYSTEM
8-4
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
NG→
OK ↓
8. Check the engine stop switch.
Refer to CHECKING THE 
SWITCHES on page 8-109. Replace the right handlebar switch.
9. Check the neutral switch. Refer to CHECKING THE 
SWITCHES on page 8-109. Replace the neutral switch.
10. Check the sidestand switch. Refer to CHECKING THE 
SWITCHES on page 8-109. Replace the sidestand switch.
11. Check the clutch switch. Refer to CHECKING THE 
SWITCHES on page 8-109. Replace the clutch...

ELECTRIC STARTING SYSTEM
8-5
EAS27160
ELECTRIC STARTING SYSTEM
EAS27170
CIRCUIT DIAGRAM
ChB
P
G/L Y/L R/GLgB/W
G/L
Y/L
R/GLgB/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
B/L
W/Y
W/Y B/L
B/L
L G/Y
R/B R/L
G/B L
B/L
W/Y
L
B/L
29
30 31
31
Y/L...

ELECTRIC STARTING SYSTEM
8-6
1. Main switch
7. Main fuse
8. Starter relay
9. Starter motor
10.Battery
11.Starting circuit cut-off relay
12.Sidestand switch
13.Neutral switch
45.Engine stop switch
46.Start switch
52.Ignition fuse
59.Clutch switch 

ELECTRIC STARTING SYSTEM
8-7
EAS27180
STARTING CIRCUIT CUT-OFF SYSTEM OPERATION
If the engine stop switch is set to “ ” and the main switch is set to “ON” (both switches are closed), 
the starter motor can only operate if at least one of the following conditions is met:
 The transmission is in neutral (the neutral switch is closed).
 The clutch lever is pulled to the handlebar (the cl utch switch is closed) and the sidestand is up (the 
sidestand switch is closed).
The starting circuit cut-off relay...