Yamaha XV19SW(C), XV19W(C), XV19MW(C), XV19CTSW(C), XV19CTW(C), XV19CTMW(C). Service Manual - part 23

ELECTRIC STARTING SYSTEM

7-12

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

9. Check the starter relay.

Refer to “CHECKING THE RE-
LAYS” on page 7-79.

Replace the starter relay.

10.Check the main switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

Replace the main switch.

11.Check the engine stop switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

The engine stop switch is faulty. Replace 
the right handlebar switch.

12.Check the neutral switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

Replace the neutral switch.

13.Check the sidestand switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

Replace the sidestand switch.

14.Check the clutch switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

Replace the clutch switch.

15.Check the start switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

The start switch is faulty. Replace the right 
handlebar switch.

16.Check the entire starting system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-7.

Properly connect or repair the starting sys-
tem wiring.

The starting system circuit is OK.

CHARGING SYSTEM

7-13

EAS27200

CHARGING SYSTEM

EAS27210

CIRCUIT DIAGRAM

W

W

W

R

R

/

G

B

ON

OFF

R

Br

R

Br

/

L

R

L

/

Y

Br

/

L

L

/

B

R

R

R

R

R

B

B

B

R

R

R

B

R

/

Y

L

B

R

/

WR

/

W

R

/

Y

R

/

Y

R

/

W

R

/

W

R

/

L

L

/

Y

L

/

R

R

/

Y

L

/

W

Sb

/

W

Sb

L

L

B

/

Y

R

R

/

L

L

/

GS

b

/

W

L

L

/

W

R

/

W

L

R

/

Y

L

/

RB

/

Y

L

/

YS

b

L

/

G

B

(BLUE)

L

/

G

B

(BLUE)

B

B

L

/

G

Sb

B

Sb

B

B

B

Y

L

Y

Y

E

B

B

E

L

L

E

Y

(BLA

CK)

L

B

B

/

L

Gy

Gy

B

Gy

B

/

L

B

/

L

L

P

/

Y

B

/

L

L

P

/

W

P

/

W

(BLA

CK)

B

/

L

L

P

/

Y

(BLA

CK)

B

L

L

W

L

B

L

W

/

Y

B

/

L

L

B

/

L

W

/

Y

B

/

L

Br

/

W

(BLA

CK)

Br

B

Br

Br

Br

B

B

B

B

B

Br

/

W

B

/

L

B

G

/

W

R

L

B

R

/

L

G

/

W

B

B

B

/

L

Y

/

G

L

Br

Br

/

L

R

Br

/

L

Br

/

L

R

/

B

Br

/

L

R

/

W

R

/

Y

Br

L

R

Y

/

B

R

/

Y

G

/

L

Br

Y

/

B

G

/

L

R

/

Y

Br

B

R

Gy

/

W

B

G

B

B

Y

/

G

W

/

R

Br

P

/

Y

Br

/

W

R

/

W

L

Y

Gy

P

/

Y

B

/

Y

Y

/

G

L

/

R

R

/

L

R

/

B

R

/

B

P

/

W

Br

Br

/

W

L

/

W

W

/

Y

B

/

L

L

/

B

R

/

W

B

/

R

R

/

W

B

/

R

Br

Br

/

W

B

Y

/

R

W

/

Y

R

/

Y

R

L

R

/

W

B

/

R

R

/

W

B

/

R

R

R

/

W

L

BL

/

Y

L

/

B

L

/

Y

(GRAY)

(GRAY)

(GRA

Y)

(BLA

CK)

L

Y

/

G

B

/

L

(BLA

CK)

B

R

W

W
W

Y

/

R

Br

/

W

B

W

/

Y

Br

CHARGING SYSTEM

7-14

1. AC magneto
2. Rectifier/regulator
4. Main fuse
6. Battery

CHARGING SYSTEM

7-15

EAS27220

TROUBLESHOOTING

The battery is not being charged.

NOTE:

• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Rectifier/regulator cover
3. Lead cover

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

1. Check the fuse.

(Main)
Refer to “CHECKING THE FUS-
ES” on page 7-75.

Replace the fuse.

2. Check the battery.

Refer to “CHECKING AND 
CHARGING THE BATTERY” on 
page 7-76.

• Clean the battery terminals.
• Recharge or replace the battery.

3. Check the stator coil.

Refer to “CHECKING THE STATOR 
COIL” on page 7-85.

Replace the stator coil.

4. Check the rectifier/regulator.

Refer to “CHECKING THE RECTI-
FIER/REGULATOR” on page 7-85.

Replace the rectifier/regulator.

5. Check the entire charging system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-13.

Properly connect or repair the charging 
system wiring.

The charging system circuit is OK.

CHARGING SYSTEM

7-16

LIGHTING SYSTEM

7-17

EAS27240

LIGHTING SYSTEM

EAS27250

CIRCUIT DIAGRAM

W

W

W

R

R

G

B

(GRA

Y)

ON

OFF

R

Br

R

B

/

L

R

L

/

Y

Br

L

L

/

B

R

R

R

R

R

B

B

B

R

R

R

B

R

/

Y

L

B

R

WR

/

W

R

/

Y

R

/

Y

R

/

W

R

/

W

R

L

R

L

/

Y

L

R

R

Y

L

W

Sb

W

Sb

L

L

B

/

Y

R

R

/

L

L

GS

b

/

W

L

L

W

R

/

W

L

R

/

Y

L

RB

/

Y

L

/

YS

b

L

G

B

(BLUE)

L

/

G

B

(BLUE)

B

B

L

/

G

R

/

W

Sb

B

Sb

B

B

B

Y

L

Y

Y

E

B

B

E

L

L

E

Y

(BLA

CK)

L

B

B

/

L

Gy

Gy

B

Gy

B

/

L

B

/

L

L

P

/

Y

B

/

L

L

P

W

P

W

(BLA

CK)

B

L

L

P

Y

(BLA

CK)

B

/

L

L

W

L

B

L

W

Y

B

/

L

B

L

W

/

Y

G

W

B

/

L

Br

/

W

(BLA

CK)

(BLA

CK)

B

B

Br

Br

Br

B

B

B

Br

W

B

/

L

B

G

/

W

R

/

L

B

R

/

L

G

W

B

B

B

/

L

L

Y

/

G

B

/

L

Y

G

L

Br

Br

/

L

Br

/

L

R

Br

L

R

B

Br

/

L

R

/

W

R

/

Y

B

Br

Br

B

R

/

B

Br

R

Y

Br

BB

Br
Y

Y

/

B

R

/

Y

G

/

L

Br

Y

B

G

/

L

R

Y

Br

(GRAY)

(GRAY)

(GRAY)

(GRAY)

(GRAY)

B

B

G

Y

G

B

(BLUE)

(BLUE)

YG

G

L

(GRAY)

(BLACK)

BB

R

/

W

B

/

R

G

LL

/

B

(BLACK)

B

L

/

B

B
B

L

Y

B

B

/

R

Y

/

B

G

Gy

R

Gy

R

O

O

Gy

W

B

/

G

B

B

Gy

Y

G

Br

L

B

Y

Y

L

Gy

L

R

L

B

R

/

L

R

/

W

Y

W

Y

W

R

W

/

G

R

/

B

R

/

B

R

/

G

Br

Gy

G

P

/

W

P

L

P

/

Y

Br

W

B

/

Br

B

/

Br

B

/

L

L

W

L

(BLA

CK)

B

B

(L)

N

(R)

(BLACK)

(BLACK)

B

B

Dg

L

Dg
L

B

L

Dg

PUSH

B

Y

B

Y

(BLA

CK)

(BLA

CK)

G
B

B

B

A

Y

Y

A

Ch

Ch

A

Dg

Dg

A

B

B

W

P

Br

BG

R

B

R

B

R

G

P

L

W

G

/

P

/

L

W

G

Br

/

L

R

/

G

P

/

L

W

G

Br

L

Gy

/

R

Gy

/

R

Gy

R

Gy

R

R

/

G

P

L

W

/

G

B

/

L

R

G

P

/

L

W

/

G

B

/

L

R

/

G

R

/

B

R

/

B

R

/

B

R

/

B

R

/

B

R

/

B

C

C

Y

/

B

Gy

W

W

R

B

/

G

B

/

R

W

/

R

(BLA

CK)

L

W

R

B

G

R

B

L

L

B

/

G

B

/

R

B

/

L

W

G

(GRA

Y)

W

Gy

(D

ARK GRA

Y)

Gy

G

G

Gy

G

Gy

Gy

W

(BLACK)

R

L

B

L

Gy

/

G

Gy

/

W

BB

WL

R

L

Gy

W

Gy

/

G

B

L

Sb

/

W

Dg

Ch

G

/

B

G

G

/

Y

Y

/

L

R

G

G

W

R

W

L

Ch

Sb

W

Y

R

W

Dg

L

Sb

Y

Ch

R

/

W

Dg

(BLACK)

G

/

W

B

Y

L

G

R

G

(BLACK)

(BLACK)

(BLACK)

G

/

W

B

Y

/

L

G

R

/

G

G

/

Y

G

/

Y

G

/

B

G

/

B

B

(GRAY)

(GRAY)

B

B

Ch

L

Ch
L

B

L

Ch

Gy

R

Gy

R

Gy

/

R

Gy

/

R

O

O

B

R

B

R

B

R

B

R

B

/

R

B

/

R

O

O

Y

/

L

Gy

/

G

D
D

R

/

W

L

Y

Gy

P

/

Y

B

/

Y

Y

/

G

L

/

R

R

L

R

/

B

R

/

B

P

/

W

Br

B

/

W

L

/

W

W

Y

B

L

L

/

B

B

B

B

/

Br

B

/

Br

R

/

W

B

/

R

R

/

W

B

R

Br

Br

/

W

B

Y

/

R

W

/

Y

Br

/

W

Y

/

R

P

G

Y

G

L

B

Y

L

/

Y

Y

Dg

G

/

B

B

Ch

G

Y

G

B

B

Ch

Dg

B

B

B

L

G

/

L

L

/

W

B

/

R

R

/

W

Y

Br

W

/

B

B

L

B

L

B

P

Br

(BLA

CK)

(BLA

CK)

B

R

W

W

B

W

W

B

G

B

G

B

L

L

A

(BLACK)

(BLACK)

R

Y

R

L

(GRAY)

/

BL

/

Y

(GRAY)

/

B

/

Y

W

W
W

Y

/

R

Br

W

B

W

Y

Br

Y

G

G

/

L

R

W

B

/

R

L

B

G

/

L

Br

Y

L

Y

B

/

Y

G

/

B

G

/

Y

Dg

h

rW

B

P

R

Dg

Ch

B

/

W

B

P

Y

R

W

B

/

W

W

B

L

W

B

L

Ch

Y

Dg

L

Ch

B

Y

Dg

A

W

RE HARNESS

W

RE HARNESS

W

RE HARNESS

W

RE HARNESS

 SUB

W

RE

HARNESS2

Y

L

B

Y

L

B

E

W

RE HARNESS

 SUB

W

RE

HARNESS1

 SUB

W

RE

HARNESS2

 SUB

W

RE

HARNESS4

 SUB

W

RE

HARNESS3

(BLACK)

(BLACK)

B

C

D

Gy

R

y

R

B

/

R

y

R

Gy

R

B

/

R

G

B

W

Gy

W

Br

G

W

Gy

B

W

Br

(BLACK)

R

/

B

P

L

R

/

B

W

G

B

/

L

R

G

(BLACK)

R

/

B

R

/

B

W

G

P

/

L

Br

L

R

/

G

Y

L

L

LIGHTING SYSTEM

7-18

3. Main switch
4. Main fuse
6. Battery
27.ECU (electronic control unit)
44.Meter light
47.High beam indicator light
52.Headlight relay
55.Dimmer switch
59.Front right turn signal/position light
60.Front left turn signal/position light
64.Headlight (high beam)
65.Headlight (low beam)
70.Accessory light switch
71.Accessory light (OPTION)
72.Tail/brake light
73.License plate light
78.Headlight fuse
79.Signaling system fuse
80.Taillight fuse
81.ECU fuse

LIGHTING SYSTEM

7-19

EAS27260

TROUBLESHOOTING

Any of the following fail to light: headlight (high beam), headlight (low beam), high beam indicator light, 
taillight, license light, position light, meter light or accessory light (OPTION).

NOTE:

• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Tool kit tray
3. Headlight assembly

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

1. Check the condition of each bulb 

and bulb socket.
Refer to “CHECKING THE BULBS 
AND BULB SOCKETS” on page 
7-74.

Replace the bulb(s) and bulb socket(s).

2. Check the fuses.

(Main, headlight, signaling system, 
taillight and ECU)
Refer to “CHECKING THE FUS-
ES” on page 7-75.

Replace the fuse(s).

3. Check the battery.

Refer to “CHECKING AND 
CHARGING THE BATTERY” on 
page 7-76.

• Clean the battery terminals.
• Recharge or replace the battery.

4. Check the main switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

Replace the main switch.

5. Check the dimmer switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

The dimmer switch is faulty. Replace the 
left handlebar switch.

6. Check the accessory light switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

The accessory light switch is faulty. Re-
place the right handlebar switch.

7. Check the headlight relay.

Refer to “CHECKING THE RE-
LAYS” on page 7-79.

Replace the headlight relay.

LIGHTING SYSTEM

7-20

 

 NG

 →

OK

 ↓

8. Check the entire lighting system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-17.

Properly connect or repair the lighting sys-
tem wiring.

The lighting system circuit is OK.

SIGNALING SYSTEM

7-21

EAS27270

SIGNALING SYSTEM

EAS27280

CIRCUIT DIAGRAM

W

W

W

R

R

G

B

(GRA

Y)

ON

OFF

R

Br

R

Br

L

R

L

Y

Br

/

L

L

B

R

R

R

R

R

B

B

B

R

R

R

B

R

Y

L

B

R

/

WR

W

R

Y

R

Y

R

/

W

R

W

R

/

L

R

L

/

Y

L

/

R

R

/

Y

L

/

W

Sb

/

W

Sb

L

L

B

/

Y

R

R

/

L

L

/

G

b

W

L

L

/

W

R

W

L

R

/

Y

L

/

RB

Y

L

YS

b

L

/

G

B

(BLUE)

L

/

G

B

(BLUE)

B

B

L

G

R

/

W

Sb

B

Sb

B

B

B

Y

L

Y

Y

B

B

L

L

Y

(BLA

CK)

L

B

B

L

Gy

Gy

B

Gy

B

L

B

L

L

P

/

Y

B

L

L

P

/

W

P

/

W

(BLA

CK)

B

/

L

L

P

/

Y

(BLA

CK)

B

/

L

L

W

L

B

L

W

Y

B

/

L

L

B

/

L

W

/

Y

G

W

B

L

Br

W

(BLA

CK)

(BLA

CK)

Br

B

Br

Br

Br

B

B

B

B

B

/

W

B

L

B

G

W

R

/

L

B

R

L

G

/

W

B

B

B

/

L

L

Y

G

B

/

L

Y

/

G

L

Br

Br

L

Br

L

R

Br

/

L

R

/

B

Br

L

R

W

R

Y

B

Br

Br

B

R

/

L

B

Br

L

R

Y

Br

BB

Br
Y

Y

B

R

Y

G

L

Br

Y

/

B

G

L

R

/

Y

Br

(GRAY)

(GRAY)

(GRAY)

(GRAY)

(GRAY)

B

B

G

/

Y

G

/

B

(BLUE)

(BLUE)

YG

G

/

L

(GRAY)

(BLACK)

BB

R

W

R

G

/

LL

B

(BLACK)

B

L

/

B

B

/

B

L

Y

B

B

R

Y

B

G

Gy

/

R

Gy

/

R

O

O

Gy

/

W

B

G

B

B

Gy

Y

/

G

B

/

L

B

/

Y

Y

/

L

Gy

L

/

R

L

/

B

R

L

R

W

Y

W

/

Y

W

/

R

W

G

R

B

R

B

R

G

Br

y

/

G

P

W

P

/

L

P

Y

B

/

W

B

B

B

B

B

L

L

/

W

L

(BLA

CK)

B

B

(L)

N

(R)

(BLACK)

(BLACK)

B

B

Dg

L

Dg
L

B

L

Dg

PUSH

B

Y

B

Y

(BLA

CK)

(BLA

CK)

G
B

B

B

A

Y

Y

A

Ch

Ch

A

Dg

Dg

B

B

/

W

P

Br

BG

R

/

B

R

/

B

R

/

G

P

/

L

W

/

G

Br

L

P

/

L

W

/

G

B

/

L

R

G

P

L

W

/

G

Br

/

L

Gy

/

R

Gy

/

R

Gy

/

R

Gy

/

R

R

G

P

/

L

W

G

Br

L

R

/

G

P

L

W

G

Br

/

L

R

/

G

R

B

R

B

R

B

R

B

R

B

R

B

D

D

D

D

Y

B

Gy

/

W

W

/

R

B

G

B

R

W

R

(BLA

CK)

L

W

/

R

B

/

GB

/

R

B

/

L

L

B

/

G

B

/

R

B

L

W

G

(GRA

Y)

W

Gy

(D

ARK GRA

Y)

Gy

G

G

Gy

G

Gy

Gy

W

(BLACK)

R

/

L

B

/

L

Gy

G

Gy

/

W

BB

WL

R

/

L

G

/

W

Gy

G

B

/

L

Sb

/

W

Dg

Ch

Y

G

/

B

G

G

/

Y

Y

/

L

R

/

G

G

/

W

R

/

W

L

L

Ch

Sb

/

W

Y

R

/

W

Dg

L

Sb

Y

Ch

R

W

Dg

(BLACK)

G

/

W

B

Y

/

L

G

R

/

G

(BLACK)

(BLACK)

(BLACK)

G

W

B

Y

L

G

R

/

G

/

Y

Y

G

B

B

B

(GRAY)

(GRAY)

B

B

Ch

L

Ch
L

B

L

Ch

Gy

/

R

Gy

/

R

Gy

/

R

Gy

/

R

C

O

O

B

/

R

B

/

R

B

/

R

B

/

R

B

/

R

B

/

R

O

O

Y

/

L

Gy

/

G

D

R

W

L

Y

Gy

P

/

Y

B

/

Y

Y

G

L

R

R

/

L

R

/

B

R

/

B

P

W

Br

Br

/

W

L

/

W

W

/

Y

B

/

L

L

B

B

B

B

Br

B

Br

R

/

W

B

R

R

/

W

B

/

R

Br

Br

W

B

Y

R

W

/

Y

B

/

W

Y

R

P

G

/

Y

G

/

L

B

/

Y

L

/

Y

Y

Dg

G

B

B

Ch

G

Y

G

B

B

Ch

Dg

B

B

B

L

G

/

L

L

W

B

R

R

W

Y

Br

W

B

B

L

/

B

L

/

B

P

Br

(BLA

CK)

(BLA

CK)

B

R

W

W

W

W

G

B

G

B

L

L

A

(BLACK)

(BLACK)

R

/

Y

R

L

(GRAY)

L

/

BL

/

Y

(GRAY)

L

/

B

Y

W

W
W

Y

R

Br

/

W

B

W

/

Y

Br

Y

G

G

L

R

/

W

B

/

R

L

/

B

G

L

Br

Y

L

/

Y

B

Y

G

B

G

Y

Dg

Ch

B

/

W

B

P

Y

/

R

Dg

Ch

Br

W

B

P

Y

/

R

W

/

B

L

W

W

/

B

L

/

W

B

L

Ch

Y

Dg

L

Ch

B

Y

Dg

A

W

RE HARNESS

W

RE HARNESS

W

RE HARNESS

W

RE HARNESS

 SUB

W

RE

HARNESS2

Y

L

B

Y

L

B

E

W

RE HARNESS

 SUB

W

RE

HARNESS1

 SUB

W

RE

HARNESS2

 SUB

W

RE

HARNESS4

 SUB

W

RE

HARNESS3

(BLACK)

(BLACK)

B

C

Gy

R

Gy

R

B

/

R

Gy

R

Gy

R

B

R

G

B

W

Gy

W

Br

G

W

Gy

B

W

Br

(BLACK)

R

B

P

/

L

R

B

W

/

G

Br

L

R

/

G

(BLACK)

R

B

R

B

W

/

G

P

L

B

/

L

R

G

SIGNALING SYSTEM

7-22

3. Main switch
4. Main fuse
5. Backup fuse (odometer and clock)
6. Battery
11.Relay unit
14.Neutral switch
18.Fuel sender (fuel pump)
24.Speed sensor
27.ECU (electronic control unit)
39.Neutral indicator light
40.Multi-function meter
43.Fuel level warning light
45.Left turn signal indicator light
46.Right turn signal indicator light
48.Fuel sender (fuel tank)
49.Horn 1
50.Horn 2
51.Turn signal relay
56.Turn signal switch
57.Horn switch
59.Front right turn signal/position light
60.Front left turn signal/position light
61.Rear right turn signal light
62.Rear left turn signal light
67.Front brake light switch
72.Tail/brake light
74.Rear brake light switch
77.Ignition fuse
79.Signaling system fuse
81.ECU fuse

SIGNALING SYSTEM

7-23

EAS27290

TROUBLESHOOTING

• Any of the following fail to light: turn signal light, brake light or an indicator light.
• The horn fails to sound.
• The fuel level gauge fails to operate.
• The speedometer fails to operate.

NOTE:

• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Tool kit tray
3. Rider seat bracket assembly
4. Headlight assembly
5. Fuel tank

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

Checking the signaling system

The horn fails to sound.
 

 NG

 →

OK

 ↓

1. Check the fuses.

(Main, backup, ignition, signaling 
system and ECU)
Refer to “CHECKING THE FUS-
ES” on page 7-75.

Replace the fuse(s).

2. Check the battery.

Refer to “CHECKING AND 
CHARGING THE BATTERY” on 
page 7-76.

• Clean the battery terminals.
• Recharge or replace the battery.

3. Check the main switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

Replace the main switch.

4. Check the entire signaling system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-21.

Properly connect or repair the signaling 
system wiring.

Check the condition of each of the sig-
naling system’s circuits. Refer to 
“Checking the signaling system”.

1. Check the horn switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

The horn switch is faulty. Replace the left 
handlebar switch.

SIGNALING SYSTEM

7-24

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

The tail/brake light fails to come on.
 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

The turn signal light, turn signal indicator light or both fail to blink.
 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

2. Check the horns.

Refer to “CHECKING THE 
HORNS” on page 7-86.

Replace the horn(s).

3. Check the entire signaling system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-21.

Properly connect or repair the signaling 
system wiring.

This circuit is OK.

1. Check the front brake light switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

Replace the front brake light switch.

2. Check the rear brake light switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

Replace the rear brake light switch.

3. Check the entire signaling system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-21.

Properly connect or repair the signaling 
system wiring.

This circuit is OK.

1. Check the condition of each bulb 

and bulb socket.
Refer to “CHECKING THE BULBS 
AND BULB SOCKETS” on page 
7-74.

Replace the bulb(s) and bulb socket(s).

2. Check the turn signal switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

The turn signal switch is faulty. Replace 
the left handlebar switch.

3. Check the turn signal relay.

Refer to “CHECKING THE TURN 
SIGNAL RELAY” on page 7-80.

Replace the turn signal relay.

SIGNALING SYSTEM

7-25

 

 NG

 →

OK

 ↓

The neutral indicator light fails to come on.
 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

The fuel level gauge fails to operate.
 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

The fuel level warning light fails to come on.
 

 NG

 →

OK

 ↓

4. Check the entire signaling system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-21.

Properly connect or repair the signaling 
system wiring.

This circuit is OK.

1. Check the neutral switch.

Refer to “CHECKING THE 
SWITCHES” on page 7-71.

Replace the neutral switch.

2. Check the relay unit (diode).

Refer to “CHECKING THE DI-
ODES” on page 7-81.

Replace the relay unit.

3. Check the entire signaling system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-21.

Properly connect or repair the signaling 
system wiring.

This circuit is OK.

1. Check the fuel sender (fuel tank).

Refer to “CHECKING THE FUEL 
SENDER (FUEL TANK)” on page 
7-87.

Replace the fuel sender.

2. Check the entire signaling system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-21.

Properly connect or repair the signaling 
system wiring.

Replace the meter assembly.

1. Check the fuel level warning light.

Refer to “CHECKING THE FUEL 
LEVEL WARNING LIGHT” on page 
7-88.

Replace the meter assembly or fuel pump 
assembly.

SIGNALING SYSTEM

7-26

 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

The speedometer fails to operate.
 

 NG

 →

OK

 ↓

 

 NG

 →

OK

 ↓

2. Check the fuel sender (fuel pump).

Refer to “CHECKING THE FUEL 
SENDER (FUEL PUMP)” on page 
7-88.

Replace the fuel pump assembly.

3. Check the entire signaling system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-21.

Properly connect or repair the signaling 
system wiring.

This circuit is OK.

1. Check the speed sensor.

Refer to “CHECKING THE SPEED 
SENSOR” on page 7-88.

Replace the speed sensor.

2. Check the entire signaling system 

wiring.
Refer to “CIRCUIT DIAGRAM” on 
page 7-21.

Properly connect or repair the signaling 
system wiring.

Replace the meter assembly.

FUEL INJECTION SYSTEM

7-27

EAS27330

FUEL INJECTION SYSTEM

EAS27340

CIRCUIT DIAGRAM

W

W

W

R

R

/

G

B

(GRA

Y)

ON

OFF

R

Br

R

Br

L

R

L

/

Y

Br

L

L

/

B

R

R

R

R

R

B

B

B

R

R

R

B

R

/

Y

L

B

R

/

WR

/

W

R

/

Y

R

/

Y

R

/

W

R

/

W

R

/

L

R

L

/

Y

L

R

R

Y

L

/

W

Sb

W

Sb

L

L

B

Y

R

R

/

L

L

GS

b

W

L

L

W

R

/

W

L

R

/

Y

L

/

RB

/

Y

L

/

YS

b

L

G

B

(BLUE)

L

/

G

B

(BLUE)

B

B

L

G

R

/

W

Sb

B

Sb

B

B

B

Y

L

Y

Y

B

B

L

L

Y

(BLA

CK)

L

B

B

/

L

Gy

Gy

B

Gy

B

/

L

B

/

L

L

P

/

Y

B

/

L

L

P

W

P

W

(BLA

CK)

B

/

L

L

P

Y

(BLA

CK)

B

/

L

L

W

L

B

L

W

/

Y

B

/

L

L

B

/

L

W

/

Y

G

W

B

/

L

Br

/

W

(BLA

CK)

(BLA

CK)

B

B

Br

Br

Br

B

B

B

Br

W

B

/

L

B

G

/

W

R

L

B

R

/

L

G

W

B

B

B

/

L

L

Y

/

G

B

L

Y

G

L

Br

Br

/

L

Br

/

L

R

Br

L

R

/

B

Br

/

L

R

/

W

R

/

Y

B

Br

Br

B

R

/

B

Br

L

R

Y

Br

BB

B
Y

Y

/

B

R

/

Y

G

/

L

Br

Y

/

B

G

/

L

R

/

Y

Br

(GRAY)

(GRAY)

(GRAY)

(GRAY)

(GRAY)

B

B

G

Y

/

B

(BLUE)

(BLUE)

YG

/

L

(GRAY)

(BLACK)

BB

R

/

W

B

/

R

G

/

L

/

B

(BLACK)

B

L

B

B

L

B

L

Y

B

B

/

R

Y

/

B

G

y

R

y

R

O

O

Gy

W

B

/

G

B

B

Gy

Y

G

Br

/

L

B

/

Y

Y

L

Gy

L

R

L

/

B

R

L

R

W

Y

W

/

Y

W

/

R

W

/

G

R

/

B

R

/

B

R

G

Br

Gy

G

P

/

W

P

L

P

Y

Br

W

B

Br

B

Br

B

/

L

L

W

L

(BLA

CK)

B

B

(L)

N

(R)

(BLACK)

(BLACK)

B

B

Dg

L

Dg
L

B

L

Dg

PUSH

B

Y

B

Y

(BLA

CK)

(BLA

CK)

G
B

B

B

A

Y

Y

Ch

Ch

A

Dg

Dg

A

B

B

/

W

P

Br

BG

R

B

R

B

R

G

P

L

W

/

G

/

L

P

L

W

/

G

Br

/

L

R

/

G

P

/

L

W

G

Br

L

Gy

/

R

Gy

/

R

Gy

R

Gy

R

R

/

G

P

/

L

W

/

G

B

/

L

R

G

P

/

L

W

/

G

Br

L

R

/

G

R

/

B

R

/

B

R

/

B

R

/

B

R

/

B

R

/

B

C

C

Y

B

Gy

/

W

W

R

B

/

G

B

/

R

W

/

R

(BLA

CK)

 

 

 

 

 

 

 

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