Yamaha XV1700P, XV1700PC. Service Manual - part 31

 

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Yamaha XV1700P, XV1700PC. Service Manual - part 31

 

 

7 - 44

+

ELEC

SIGNALING SYSTEM

EAS00793

SIGNALING SYSTEM

CIRCUIT DIAGRAM 

B3

B3

R

/

B

L

/

R

R

/

L

R

/

W

(BLACK)

(GRAY)

W

W

W

R

B

B

W

W

W

W

W

W

B

/

W

Br

/

Y

P

/

W

R

/

W

W

/

B

W

/

Y

Y

/

L

G

B

/

L

Y

/

G

Y

/

G

G

P

R

O

B

P

Br

Y

R

/

G

R

/

G

G

G

G

G

/

RB

/

L

G

W

L

B

L

W

/

Y

B

/

L

P

P

/

W

L

B

/

L

(BLA

CK)

B
Y
L

(BLA

CK)

L

B

/

L

P

/

Y

(GRA

Y)

L

B

/

L

(BLA

CK)

L

Y

/

G

L

B

/

L

P

/

W

P

/

Y

B

/

L

Br

/

W

L

P

B

Y

L

B

/

L

L

B

/

L

W

G

/

R

B

/

L

Gy

/

R

WG

(GRA

Y)

W

Gy

(D

ARK GRA

Y)

(BLA

CK)

(BLA

CK)

B

/

O

B

/

R

B

/

R

G

/

R

R

/

G

Y

/

G

B

/

L

P

/

L

Y

/

L

Y

/

B

Gy

Gy

G

L

/

R

Lg

Y

/

R

R

/

L

R

/

W

R

/

W

Y

W

/

Y

W

/

G

R

/

B

P

Br

P

/

Y

P

/

W

Br

/

W

Br

/

L

B

/

RB

/

W

B

/

Y

B

/

O

B

/

G

Y

/

RL

/

W

W

/

B

W

L

L

/

B

B3

B3

(BLA

CK)

L

/

G

L

/

R

L

/

G

B

/

Y

B

/

R

B

(BLUE)

Br

/

B

R

/

L

L

/

W1

L

/

R

L

/

Y

L

/

G

Sb

Lg

B

/

R

B

/

Y

L

R

/

L

B

B
B

B

B

L

/

G

B

(BLUE)

B

/

L

Gy

B

B

Gy

B

L

/

Y

R

/

L

Br

/

B

Gy

B

/

L

Sb

Lg

Sb

L

B

/

L

W

/

Y

L

B

/

L

W

/

B

Br

/

W

Br

/

W

Br

/

L

Br

/

L

Br

/

L

B

B

W

L

(BLA

CK)

(BLA

CK)

(BLA

CK)

(BLA

CK)

(BLA

CK)

(BLA

CK)

W

B

Br

B

W

L

B

L

W

/

B

B

/

L

Y

L

B

L

Y

B

P

/

Y

Gy

Br

Br

G

Gy

Lg

Lg

W

B

/

L

B

/

O

(RED)

(RED)

(BLUE)

(BLUE)

Y

/

L

B

L

Br

L

Br

Y

/

L

B

Gy

/

R

Lg

BB

Br

/

Y

O

P

R

P

R

Br

/

Y

O

Gy

L

/

R

B

/

L

L

/

R

B

/

L

G

/

R

Gy

G

/

R

(GREEN)

(GREEN)

B

B

Lg

Lg

Dg

Dg

Br

Br

Y

Y

Ch

Ch

(RED)

(BLUE)

P

R

Br

/

Y

O

Gy

L

/

R

B

/

LG

/

R

Gy

Gy

Br

G

/

R

L

/

R

Br

/

Y

B

/

L

P

R

Y

O

G

/

R

L

/

R

G

G

G

Gy

Gy

Gy

W

W

W

W

W

R

/

B

R

/

B

R

/

G

P

/

L

W

/

G

Br

/

L

R

R

/

G

R

B

B

B

R

R

R

R

R

B

B

R

/

W

R

/

B

R

/

W

RR

L

B

Br

WY

/

R

Br

/

W

B

B

ON

OFF

R

/

B

R

Br

/

L

L

/

B

L

/

Y

R

R

/

B

R

/

B

Gy

/

R

R

Br

/

B

(BLACK)

Y

Br

(BLACK)

B

B

(BLACK)

B

/

GL

/

W1

B

/

R

R

/

W

Y

Br

(BLACK)

R

/

W

B

L

/

W

R

/

B

G

/

Y

Br

(BLACK)

L

/

Y

B

/

YB

/

Y

Ch

Dg

G

Y

(BLUE)

L

/

Y

Ch

Dg

G

Y

(BLUE)

A

A

L

L

L

L

Y

A

B

B

Y

Y

Y

A

Ch

Ch

A

B

B

A

B

B

B

B

Dg

Dg

Dg

Y

Ch

B

B

B

B

G

G

B

Y

R

/

Y

G

/

L

Y

/

B

R

/

Y

Br

W

B

/

W

P

B

B

/

G

B

/

R

R

/

Y

R

/

W

B

/

G

L

/

W1

B

/

R

R

/

W

B

/

YL

/

Y

B

/

Y

B

/

L

P

B

Y

G

B

Ch

Dg

B

/

Y

G

/

L

Y

/

B

Y

/

R

Y

/

R

R

/

Y

R

/

Y

Br

/

W

Br

/

W

L

/

Y

Y

/

R

G

/

L

P

Br

/

W

B

R

/

Y

Y

/

R

P

Br

/

W

B

Lg

Br

Ch

Dg

L

/

B

L

/

W

Y

/

B

G

/

R

Y

/

L

Y

/

R

B

/

W

R

/

G

P

/

L

W

/

G

Br

/

L

R

/

G

P

/

L

W

/

G

Br

/

L

R

/

B

R

/

B

L

/

W1

L

B

/

L

B

/

L

L

B

R

Br

Br

L

L

Dg

Ch

B

B

B

B

B

B

L

Br

R

/

G

L

9

0

A

(L)

N (R)

Y

Ch

LB

Dg

Ch

Y

L

B

Dg

12

3

4

5

6

7

F

E

B

C

D

L

G

H

I

J

K

M

N

O

P

Q

R

R

S

S

T

U

V

W

Z

X

Y

[

\

]

^

a

b

c

d

e

f

g

h

i

j

k

l

q

m

n

o

p

r

s

t

u

v

w

y

x

z

{

|

}

~

å

8

A

WIREHARNESS

TAIL SUB-WIREHARNESS

B

B

R

/

L

G

R

L

/

B

Br

/

L

L

/

Y

R

L

/

B

Br

/

L

L

/

Y

(BLACK)

W

G

W

G

/

Y

W

G

/

Y

W

G

(BLACK)

(BLACK)

Br

P

B

WIREHARNESS

INJECTION SUB-WIREHARNESS

7 - 45

+

ELEC

SIGNALING SYSTEM

3

Main switch 

4

Battery 

5

Backup fuse (odometer and clock)

6

Main fuse 

9

Relay unit 

B

Fuel pump

C

Neutral switch 

P

ECU

X

Tachometer 

[

Engine trouble warning light

\

Neutral indicator light 

]

Speedometer

_

Fuel level warning light 

a

Left turn signal indicator light 

b

Right turn signal indicator light 

e

Turn signal relay 

f

Horn 1 

g

Horn 2

l

Horn switch 

m

Turn signal switch 

n

Front turn signal/position light (left) 

o

Front turn signal/position light (right)

p

Rear turn signal light (right)

q

Rear turn signal light (left)

t

Front brake light switch 

w

Tail/brake light 

y

Rear brake light switch 

|

Signaling system fuse 

7 - 46

+

ELEC

SIGNALING SYSTEM

EAS00794

TROUBLESHOOTING

Check: 
1. main, signaling system and backup fuses 
2. battery 
3. main switch 
4. wiring connections 

(of the entire signaling system)

NOTE:

• Before troubleshooting, remove the following

part(s): 

1. seat
2. headlight lens unit
• Troubleshoot with the following special

tool(s). 

EAS00738

YES

NO

EAS00739

YES

NO

EAS00749

YES

NO

EAS00795

YES

NO

• Any of the following fail to light: turn

signal light, brake light or an indicator
light. 

• The horn fails to sound.

Pocket tester 

YU-03112

1. Main, signaling system and backup fuses 

• Check the main, signaling system and

backup fuses for continuity. 
Refer to “CHECKING THE FUSES” in
chapter 3. 

• Are the main and ignition fuses OK?

Replace the fuse(s).

2. Battery 

• Check the condition of the battery. 

Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.

Minimum open-circuit voltage 

12.8 V or more at 20 °C (68 °F)

• Is the battery OK?

• Clean the battery

terminals. 

• Recharge or 

replace the battery.

3. Main switch 

• Check the main switch for continuity. 

Refer to “CHECKING THE SWITCHES”. 

• Is the main switch OK?

Replace the main
switch.

4. Wiring 

• Check the entire signal system’s wiring. 

Refer to “CIRCUIT DIAGRAM”. 

• Is the signaling system’s wiring properly

connected and without defects?

Check the condition
of each of the signal-
ing system’s circuits. 
Refer to “CHECK-
ING THE SIGNAL-
ING SYSTEM”.

Properly connect or
repair the signaling
system’s wiring.

7 - 47

+

ELEC

SIGNALING SYSTEM

EAS00796

CHECKING THE SIGNALING SYSTEM

1. The horn 1 fails to sound.

YES

NO

YES

NO

NO

YES

1. Horn switch 

• Check the horn switch for continuity. 

Refer to “CHECKING THE SWITCHES”. 

• Is the horn switch OK?

Replace the left han-
dlebar switch.

2. Voltage 

• Connect the pocket tester (DC 20 V) to the

horn 1 connector at the horn 1 terminal as
shown.

Positive tester probe 

 black/white 

1

 

Negative tester probe 

 ground

• Set the main switch to “ON”. 
• Push the horn switch. 
• Measure the voltage (DC 12 V) of black/

white at the horn 1 terminal. 

• Is the voltage within specification?

The wiring circuit
from the main switch
to the horn connector
is faulty and must be
repaired.

B

/

W

B

1

3. Horn 1 

• Disconnect the black connector at the horn

1 terminal. 

• Connect a jumper lead 

1

 to the horn 1 ter-

minal and ground the jumper lead. 

• Set the main switch to “ON”. 
• Push the horn switch. 
• Does the horn 1 sound?

Replace the horn 1.

The horn 1 is OK.

B

/

W

1

7 - 48

+

ELEC

SIGNALING SYSTEM

EAS00796

2. The horn 2 fails to sound.

YES

NO

YES

NO

NO

YES

EAS00797

3. The tail/brake light fails to come on.

YES

NO

1. Horn switch 

• Check the horn switch for continuity. 

Refer to “CHECKING THE SWITCHES”. 

• Is the horn switch OK?

Replace the left han-
dlebar switch.

2. Voltage 

• Connect the pocket tester (DC 20 V) to the

horn 2 coupler as shown.

Positive tester probe 

 brown 

1

 

Negative tester probe 

 ground

• Set the main switch to “ON”. 
• Push the horn switch. 
• Measure the voltage (DC 12 V) of brown

1

 at the horn 2 coupler. 

• Is the voltage within specification?

The wiring circuit
from the main switch
to the horn coupler is
faulty and must be
repaired.

3. Horn 2 

• Disconnect the horn 2 coupler at the horn

2. 

• Connect a jumper lead 

1

 to the brown ter-

minal in the horn coupler and the horn ter-
minal. 

• Connect a jumper lead 

2

 to the horn ter-

minal and ground the jumper lead. 

• Set the main switch to “ON”. 
• Push the horn switch. 
• Does the horn 2 sound?

Replace the horn 2.

The horn 2 is OK.

1. Tail/brake light LED

• Check the LED of the tail/brake light. 

Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

• Are the tail/brake light LED OK?

Replace the tail/
brake light assembly.

7 - 49

+

ELEC

SIGNALING SYSTEM

YES

NO

YES

NO

EAS00799

4. The turn signal light, turn signal indicator

light or both fail to blink.

YES

NO

YES

NO

YES

NO

2. Brake light switches 

• Check the brake light switches for continu-

ity. 
Refer to “CHECKING THE SWITCHES”. 

• Is the brake light switch OK?

Replace the brake
light switch.

3. Voltage 

• Connect the pocket tester (DC 20 V) to the

tail/brake light assembly coupler (tail sub-
wire harness side) as shown.

Positive tester probe 

 yellow 

1

 

Negative tester probe 

 black 

2

• Set the main switch to “ON”. 
• Pull in the brake lever or push down on the

brake pedal. 

• Measure the voltage (DC 12 V) of yellow

1

 on the tail/brake light assembly coupler

(tail sub-wire harness side). 

• Is the voltage within specification?

This circuit is OK.

The 

wiring 

circuit

from the main switch
to the tail/brake light
assembly coupler is
faulty and must be
repaired.

Y

L

B

L

Y

B

1

2

1. Turn signal light bulb and socket 

• Check the turn signal light bulb and socket

for continuity. 
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

• Is the turn signal light bulb and socket OK?

Replace the turn sig-
nal light bulb, socket
or both.

2. Turn signal indicator light LED 

• Check the LED of the turn signal light. 

Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

• Are the turn signal light LED OK?

Replace the speed-
ometer assembly.

3. Turn signal switch 

• Check the turn signal switch for continuity. 

Refer to “CHECKING THE SWITCHES”. 

• Is the turn signal switch OK?

Replace the left han-
dlebar switch.

7 - 50

+

ELEC

SIGNALING SYSTEM

YES

NO

YES

NO

4. Voltage 

• Connect the pocket tester (DC 20 V) to the

turn signal relay coupler (wire harness
side) as shown.

Positive tester probe 

 brown 

1

 

Negative tester probe 

 ground

• Set the main switch to “ON”. 
• Measure the voltage (DC 12 V) on brown

1

 at the turn signal relay coupler (wire

harness side). 

• Is the voltage within specification?

The wiring circuit
from the main switch
to the turn signal
relay coupler is faulty
and must be
repaired.

5. Voltage 

• Connect the pocket tester (DC 20 V) to the

turn signal relay coupler (wire harness
side) as shown.

Positive tester probe 

 brown/white 

1

 

Negative tester probe 

 ground

• Set the main switch to “ON”. 
• Set the turn signal switch to “

” or “

”. 

• Measure the voltage (DC 12 V) on brown/

white 

1

 at the turn signal relay coupler

(wire harness side). 

• Is the voltage within specification?

The turn signal relay
is faulty and must be
replaced.

7 - 51

+

ELEC

SIGNALING SYSTEM

YES

NO

EAS00800

5. The neutral indicator light fails to come on.

YES

NO

YES

NO

6. Voltage 

• Connect the pocket tester (DC 20 V) to the

turn signal light connectors or speedome-
ter assembly coupler (wire harness side)
as shown.

È

Turn signal light 

É

Turn signal indicator light

Left turn signal light 

Positive tester probe 

 chocolate 

1

 

Negative tester probe 

 ground 

Right turn signal light 

Positive tester probe 

 dark green 

2

 

Negative tester probe 

 ground

È

B

Lg

Dg Ch

Y

Br

B

Lg

Dg

Ch

Y

Br

2

1

É

• Set the main switch to “ON”. 
• Set the turn signal switch to “

” or “

”. 

• Measure the voltage (DC 12 V) of the

chocolate 

1

 or dark green 

2

 at the turn

signal light connectors or the speedometer
assembly coupler (wire harness side). 

• Is the voltage within specification?

This circuit is OK.

The 

wiring 

circuit

from the turn signal
switch to the turn sig-
nal light connector or
the speedometer
coupler are faulty
and must be
repaired.

1. Neutral indicator light LED

• Check the LED of the neutral indicator

light. 
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

• Are the neutral indicator light LED OK?

Replace the speed-
ometer assembly.

2. Neutral switch 

• Check the neutral switch for continuity. 

Refer to “CHECKING THE SWITCHES”. 

• Is the neutral switch OK?

Replace the neutral
switch.

7 - 52

+

ELEC

SIGNALING SYSTEM

YES

NO

EAS00803

6. The fuel level indicator light fails to come

on.

YES

NO

YES

NO

3. Voltage 

• Connect the pocket tester (DC 20 V) to the

speedometer assembly coupler (wire har-
ness side) as shown.

Positive tester probe 

 brown 

1

 

Negative tester probe 

 light green 

2

• Set the main switch to “ON”. 
• Measure the voltage (DC 12 V) of brown

1

 and light green 

2

 at the speedometer

assembly coupler (wire harness side). 

• Is the voltage within specification?

This circuit is OK.

The 

wiring 

circuit

from the main switch
to the speedometer
assembly coupler is
faulty and must be
repaired.

B

Lg

Dg Ch

Y

Br

B

Lg

Dg

Ch

Y

Br

2

1

1. Fuel level indicator light LED 

• Check the LED of the fuel level indicator

light. 
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

• Are the fuel level indicator light LED OK?

Replace the speed-
ometer assembly.

2. Fuel pump (fuel sender)

• Drain the fuel from the fuel tank and

remove the fuel pump from the sub fuel
tank. 

• Disconnect the fuel pump coupler from the

fuel pump. 

• Connect the pocket tester (

 

×

 1) to the

fuel pump terminal as shown.

Positive tester probe 

 green 

1

 

Negative tester probe 

 black 

2

• Measure the fuel sender resistance.

Fuel sender resistance

900 ~ 2,050 

 at 20 °C (68 °F) 

• Is the fuel sender OK?

Replace the fuel
pump.

R

/

L

G

B

B

2

1

7 - 53

+

ELEC

SIGNALING SYSTEM

YES

NO

EAS00800

7. The engine trouble warning light fails to

come on.

YES

NO

YES

NO

3. Voltage 

• Connect the pocket tester (DC V 20) to the

speedometer assembly coupler (wire har-
ness side) as shown.

Positive tester probe 

 brown 

1

 

Negative tester probe 

 black 

2

• Set the main switch to “ON”. 
• Measure the voltage (DC 12 V) of brown

1

 and black 

2

 at the speedometer

assembly coupler (wire harness side). 

• Is the voltage within specification?

Replace the speed-
ometer assembly.

The wiring circuit
from the main switch
to the speedometer
assembly coupler is
faulty and must be
repaired.

1. Engine trouble warning light LED

• Check the LED of the engine trouble warn-

ing light. 
Refer to “CHECKING THE BULBS AND
BULB SOCKETS”.

• Are the engine trouble warning light LED

OK?

Replace the speed-
ometer assembly.

B

Lg

Dg Ch

Y

Br

B

Lg

Dg

Ch

Y

Br

2

1

2. Voltage 

• Connect the pocket tester (DC 20 V) to the

speedometer assembly coupler (wire har-
ness side) as shown.

Positive tester probe 

 brown 

1

 

Negative tester probe 

 gray 

2

• Set the main switch to “ON”. 
• Measure the voltage (DC 12 V) of brown

1

 and gray 

2

 at the speedometer assem-

bly coupler (wire harness side). 

• Is the voltage within specification?

This circuit is OK.

The 

wiring 

circuit

from the main switch
to the speedometer
assembly coupler is
faulty and must be
repaired.

G

/

R

G

/

R

Gy

Gy

B

/

L

L

/

R

L

/

R

B

/

L

B

Lg

Dg Ch

Y

Br

B

Lg

Dg

Ch

Y

Br

2

1

7 - 54

+

ELEC

FUEL INJECTION SYSTEM

FUEL INJECTION SYSTEM

CIRCUIT DIAGRAM

B3

B3

R

/

B

L

/

R

R

/

L

R

/

W

(BLACK)

(GRAY)

W

W

W

R

B

B

W

W

W

W

W

W

B

/

W

Br

/

Y

P

/

W

R

/

W

W

/

B

W

/

Y

Y

/

L

G

B

/

L

Y

/

G

Y

/

G

G

P

R

O

B

P

Br

Y

R

/

G

R

/

GG

G

G

G

/

RB

/

L

G

W

L

B

L

W

/

Y

B

/

L

P

P

/

W

L

B

/

L

(BLA

CK)

B
Y
L

(BLA

CK)

L

B

/

L

P

/

Y

(GRA

Y)

L

B

/

L

(BLA

CK)

L

Y

/

G

L

B

/

L

P

/

W

P

/

Y

B

/

L

Br

/

W

L

P

B

Y

L

B

/

L

L

B

/

L

W

G

/

R

B

/

L

Gy

/

R

WG

(GRA

Y)

W

Gy

(D

ARK GRA

Y)

(BLA

CK)

(BLA

CK)

B

/

O

B

/

R

B

/

R

G

/

R

R

/

G

Y

/

G

B

/

L

P

/

L

Y

/

L

Y

/

B

Gy

Gy

G

L

/

R

Lg

Y

/

R

R

/

L

R

/

W

R

/

W

Y

W

/

Y

W

/

G

R

/

B

P

Br

P

/

Y

P

/

W

Br

/

W

Br

/

L

B

/

RB

/

W

B

/

Y

B

/

O

B

/

G

Y

/

RL

/

W

W

/

B

W

L

L

/

B

B3

B3

(BLA

CK)

L

/

G

L

/

R

L

/

G

B

/

Y

B

/

R

B

(BLUE)

Br

/

B

R

/

L

L

/

W1

L

/

R

L

/

Y

L

/

G

Sb

Lg

B

/

R

B

/

Y

L

R

/

L

B

B
B

B

B

L

/

G

B

(BLUE)

B

/

L

Gy

B

B

Gy

B

L

/

Y

R

/

L

Br

/

B

Gy

B

/

L

Sb

Lg

Sb

L

B

/

L

W

/

Y

L

B

/

L

W

/

B

Br

/

W

Br

/

W

Br

/

L

Br

/

L

Br

/

L

B

B

W

L

(BLA

CK)

(BLA

CK)

(BLA

CK)

(BLA

CK)

(BLA

CK)

(BLA

CK)

W

B

Br

B

W

L

B

L

W

/

B

B

/

L

Y

L

B

L

Y

B

P

/

Y

Gy

Br

Br

G

Gy

Lg

Lg

W

B

/

L

B

/

O

(RED)

(RED)

(BLUE)

(BLUE)

Y

/

L

B

L

Br

L

Br

Y

/

L

B

Gy

/

R

Lg

BB

Br

/

Y

O

P

R

P

R

Br

/

Y

O

Gy

L

/

R

B

/

L

L

/

R

B

/

L

G

/

R

Gy

G

/

R

(GREEN)

(GREEN)

B

B

Lg

Lg

Dg

Dg

Br

Br

Y

Y

Ch

Ch

(RED)

(BLUE)

P

R

Br

/

Y

O

Gy

L

/

R

B

/

LG

/

R

Gy

Gy

Br

G

/

R

L

/

R

Br

/

Y

B

/

L

P

R

Y

O

G

/

R

L

/

R

G

G

G

Gy

Gy

Gy

W

W

W

W

W

R

/

B

R

/

B

R

/

G

P

/

L

W

/

G

Br

/

L

R

R

/

G

R

B

B

B

R

R

R

R

R

B

B

R

/

W

R

/

B

R

/

W

RR

L

B

Br

WY

/

R

Br

/

W

B

B

ON

OFF

R

/

B

R

Br

/

L

L

/

B

L

/

Y

R

R

/

B

R

/

B

Gy

/

R

R

Br

/

B

(BLACK)

Y

Br

(BLACK)

B

B

(BLACK)

B

/

GL

/

W1

B

/

R

R

/

W

Y

Br

(BLACK)

R

/

W

B

L

/

W

R

/

B

G

/

Y

Br

(BLACK)

L

/

Y

B

/

YB

/

Y

Ch

Dg

G

Y

(BLUE)

L

/

Y

Ch

Dg

G

Y

(BLUE)

A

A

L

L

L

L

Y

A

B

B

Y

Y

Y

A

Ch

Ch

A

B

B

A

B

B

B

B

Dg

Dg

Dg

Y

Ch

B

B

B

B

G

G

B

Y

R

/

Y

G

/

L

Y

/

B

R

/

Y

Br

W

B

/

W

P

B

B

/

G

B

/

R

R

/

Y

R

/

W

B

/

G

L

/

W1

B

/

R

R

/

W

B

/

YL

/

Y

B

/

Y

B

/

L

P

B

Y

G

B

Ch

Dg

B

/

Y

G

/

L

Y

/

B

Y

/

R

Y

/

R

R

/

Y

R

/

Y

Br

/

W

Br

/

W

L

/

Y

Y

/

R

G

/

L

P

Br

/

W

B

R

/

Y

Y

/

R

P

Br

/

W

B

Lg

Br

Ch

Dg

L

/

B

L

/

W

Y

/

B

G

/

R

Y

/

L

Y

/

R

B

/

W

R

/

G

P

/

L

W

/

G

Br

/

L

R

/

G

P

/

L

W

/

G

Br

/

L

R

/

B

R

/

B

L

/

W1

L

B

/

L

B

/

L

L

B

R

Br

Br

L

L

Dg

Ch

B

B

B

B

B

B

L

Br

R

/

G

L

9

0

A

(L)

N (R)

Y

Ch

LB

Dg

Ch

Y

L

B

Dg

12

3

4

5

6

7

F

E

B

C

D

L

G

H

I

J

K

M

N

O

P

Q

R

R

S

S

T

U

V

W

Z

X

Y

[

\

]

^

a

b

c

d

e

f

g

h

i

j

k

l

q

m

n

o

p

r

s

t

u

v

w

y

x

z

{

|

}

~

å

8

A

WIREHARNESS

TAIL SUB-WIREHARNESS

B

B

R

/

L

G

R

L

/

B

Br

/

L

L

/

Y

R

L

/

B

Br

/

L

L

/

Y

(BLACK)

W

G

W

G

/

Y

W

G

/

Y

W

G

(BLACK)

(BLACK)

Br

P

B

WIREHARNESS

INJECTION SUB-WIREHARNESS

7 - 55

+

ELEC

FUEL INJECTION SYSTEM

3

Main switch 

4

Battery

6

Main fuse 

A

Fuel injection system relay

B

Fuel pump

E

Crankshaft position sensor

F

Throttle position sensor

G

Intake air pressure sensor 1 

H

Intake air pressure sensor 2 

I

Atmospheric pressure sensor

J

Cylinder identification sensor

K

Lean angle cut-off switch

L

Speed sensor

M

Intake air temperature sensor

N

Engine temperature sensor

O

Oil temperature sensor

P

ECU

Q

Linear control valve 

U

Cylinder #1-injector

V

Cylinder #2-injector

u

Engine stop switch

{

Ignition fuse

~

ECU fuse

å

Fuel injection system fuse

7 - 56

+

ELEC

FUEL INJECTION SYSTEM

EAS00821

TROUBLESHOOTING

Check: 
1. main, ignition, ECU and fuel injection 

system fuses 

2. battery 
3. main switch 
4. engine stop switch
5. relay unit (fuel injection system relay)
6. cylinder #1-injector resistance
7. cylinder #2-injector resistance
8. fuel pump resistance
9. crankshaft position sensor resistance
10.cylinder identification sensor output voltage
11.speed sensor output voltage 
12.intake air temperature sensor resistance
13.intake air pressure sensor 1 output voltage
14.intake air pressure sensor 2 output voltage
15.atmospheric pressure sensor output 

voltage

16.engine temperature sensor resistance
17.oil temperature sensor resistance
18.wiring connections 

(of the entire carburetor heating system)

NOTE:

• Before troubleshooting, remove the following

part(s): 

1. seat
2. headlight lens unit
3. fuel tank
4. air induction system cover
5. air filter case
6. silencer air filter case
7. muffler and exhaust pipes
8. intake manifold
• Troubleshoot with the following special

tool(s). 

EAS00738

YES

NO

EAS00739

YES

NO

EAS00749

YES

NO

If the fuel injection system fails to oper-
ate.

Pocket tester 

YU-03112

1. Main, ignition, ECU and fuel injection sys-

tem fuses 

• Check the main, ignition, ECU and fuel

injection system fuses for continuity. 
Refer to “CHECKING THE FUSES” in
chapter 3. 

• Are the main, ignition, ECU and fuel injec-

tion system fuses OK?

Replace the fuse(s).

2. Battery 

• Check the condition of the battery. 

Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.

Minimum open-circuit voltage 

12.8 V or more at 20 °C (68 °F)

• Is the battery OK?

• Clean the battery

terminals. 

• Recharge or 

replace the battery.

3. Main switch 

• Check the main switch for continuity. 

Refer to “CHECKING THE SWITCHES”. 

• Is the main switch OK?

Replace the main
switch.

7 - 57

+

ELEC

FUEL INJECTION SYSTEM

EAS00750

YES

NO

EAS00759 

YES

NO

YES

NO

4. Engine stop switch 

• Check the engine stop switch for continu-

ity. 
Refer to “CHECKING THE SWITCHES”. 

• Is the engine stop switch OK?

Replace the right
handlebar switch.

5. Relay unit (fuel injection system relay)

• Remove the relay unit from the wire har-

ness. 

• Connect the pocket tester (

 

×

 1) and bat-

tery (12 V) to the relay unit terminals as
shown.

Positive battery terminal 

 black/red 

1

 

Negative battery terminal 

 blue/red 

2

Positive tester probe 

 brown/black 

3

 

Negative tester probe 

 red/blue 

4

• Does the fuel injection system relay have

continuity between brown and red/blue?

Replace the relay 
unit.

L

/

G L

/

Y Sb B

/

Y Lg

B

/

R L

/

W

L

/

R

R

/

L

Br

/

B L

+

3

1

2

4

6. Cylinder #1-injector resistance

• Disconnect the injection sub-wire harness

coupler from the cylinder #1-injector. 

• Connect the pocket tester (

 

×

 1) to the

cylinder #1-injector terminal as shown.

Positive tester probe 

 gray 

1

 

Negative tester probe 

 white 

2

• Measure the cylinder #1-injector resis-

tance.

Cylinder #1-injector resistance 

14.2 ~ 14.8 

 at 20 °C (68 °F)

• Is the cylinder #1-injector OK?

Replace the cylinder 
#1-injector.

W Gy

1

2

7 - 58

+

ELEC

FUEL INJECTION SYSTEM

YES

NO

EAS00817 

YES

NO

7. Cylinder #2-injector resistance

• Disconnect the injection sub-wire harness

coupler from the cylinder #2-injector. 

• Connect the pocket tester (

 

×

 1) to the

cylinder #2-injector terminal as shown.

Positive tester probe 

 green 

1

 

Negative tester probe 

 white 

2

• Measure the cylinder #2-injector resis-

tance.

Cylinder #2-injector resistance 

14.2 ~ 14.8 

 at 20 °C (68 °F)

• Is the cylinder #2-injector OK?

Replace the cylinder 
#2-injector.

W G

1

2

8. Fuel pump resistance

• Disconnect the fuel pump coupler from the

fuel pump. 

• Connect the pocket tester (

 

×

 1) to the

fuel pump terminal as shown.

Positive tester probe 

 red/blue 

1

 

Negative tester probe 

 black 

2

• Measure the fuel pump resistance.

Fuel pump resistance 

0.2 ~ 3.0 

 at 20 °C (68 °F)

• Is the fuel pump OK?

Replace the fuel 
pump.

R

/

L

G

B

B

1

2

7 - 59

+

ELEC

FUEL INJECTION SYSTEM

EAS00748 

YES

NO

YES

NO

9. Crankshaft position sensor resistance

• Disconnect the crankshaft position sensor

coupler from the wire harness. 

• Connect the pocket tester (

 

×

 100) to the

crankshaft position sensor coupler as
shown.

Positive tester probe 

 gray 

1

 

Negative tester probe 

 black 

2

• Measure the crankshaft position sensor

resistance.

Crankshaft position sensor 
resistance 

248 ~ 372 

 at 20 °C (68 °F)

(between gray and black)

• Is the crankshaft position sensor OK?

Replace the crank-
shaft position sensor.

10.Cylinder identification sensor output volt-

age

• Connect the pocket tester (DC 20 V) to the

cylinder identification sensor coupler as
shown.

Positive tester probe 

 white 

1

Negative tester probe 

 black 

2

• Set the main switch to “ON”.
• Measure the cylinder identification sensor

output voltage.

Cylinder identification sensor 
output voltage

When sensor is on

DC 4.8 V or more

When sensor is off

DC 0.8 V or less

• Is the cylinder identification sensor OK?

Replace the cylinder 
identification sensor.

L

W

L W

/

B

B

/

L

B

1

2

 

 

 

 

 

 

 

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