multi function display YAMAHA WR 250F 2007 User Guide

2 - 115
SPECCABLE ROUTING DIAGRAM
1Throttle cable
2Clamp
3Brake hose
4Clutch cable
5Hose guide
6Main switch coupler
7Wire harness
8Headlight coupler
9Hot starter cable
0Multi-function display bracket
AMain switch
BUpper bracket
CClutch switch coupler
DEngine stop switch coupler
EMulti-function display coupler
FStart switch coupler
GSpeed sensor couplerHSpeed sensor lead
40˚±10˚

2 - 117
SPECCABLE ROUTING DIAGRAM
ÈFasten the start switch lead to the handlebar with the plastic
bands.
ÉFasten the engine stop switch lead and clutch switch lead to
the handlebar with the plastic bands.
ÊPass the brake hose through the hose guides.
ËSecure the coupler by inserting it into the multi-function display
bracket.
ÌPass the throttle cables, clutch cable and hot starter cable
between the upper bracket and multi-function display bracket.
ÍFasten the multi-function display leads to the bracket. Cut off
the tie end.
ÎSecure the coupler by pushing it into the hole in the multi-func-
tion display bracket.
ÏSecure the wire harness clip by pushing it into the hole in the
multi-function display bracket on the inside.
ÐFasten the wire harness to the multi-function display bracket.
Cut off the tie end.ÑFasten the main switch lead (wire harness side) to the multi-
function display bracket. Locate the clamp end facing toward
the lower side of the frame and cut off the tie end.
ÒPass the speed sensor lead through the guide on the outside
of the front fork.
40˚±10˚

6 - 105
CHASSTEERING
EC560000
STEERING
Extent of removal:
1 Lower bracket removal
2 Bearing removal
Extent of removal Order Part name Q’ty Remarks
STEERING REMOVAL
WARNING
Support the machine securely so there is nodanger of it falling over. Preparation for removal Hold the machine by placing the suitable
stand under the engine.
Headlight
Handlebar Refer to “HANDLEBAR” section.
Front brake hose guide
Front fender
1 Multi-function display 1
2 Multi-function display bracket 1
3 Main switch 1 Disconnect the main switch lead.
4 Steering stem nut 1
5 Front fork 2 Refer to “FRONT FORK” section.
6 Upper bracket 1
7 Steering ring nut 1 Use special tool.
Refer to “REMOVAL POINTS”.
8 Lower bracket 1
12

6 - 119
CHASSTEERING
12. Tighten:
•Pinch bolt (upper bracket)
1
•Pinch bolt (lower bracket)
2
CAUTION:
Tighten the lower bracket to speci-
fied torque. If torqued too much, it
may cause the front fork to mal-
function.
T R..21 Nm (2.1 m · kg, 15 ft · lb)
T R..21 Nm (2.1 m · kg, 15 ft · lb)
13. Install:
•Multi-function display bracket
1
•Multi-function display
2
NOTE:Pass the throttle cables
3, clutch
cable
4 and hot starter cable
5
between the multi-function display
bracket and upper bracket.
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
T R..4 Nm (0.4 m · kg, 2.9 ft · lb)
14. Install:
•Holder
1
•Clamp
2
NOTE:•Install so that the marking
a on
the speed sensor lead aligns with
the holder edge.
•Fasten the speed sensor lead to
the holder with the clamp.
T R..13 Nm (1.3 m · kg, 9.4 ft · lb)
T R..7 Nm (0.7 m · kg, 5.1 ft · lb)
12. Serrer:
Boulon de pincement (té supé-
rieur) 1
Boulon de pincement (té infé-
rieur) 2
ATTENTION:
Serrer le té inférieur au couple spéci-
fié. Un serrage excessif peut compro-
mettre le bon fonctionnement de la
fourche.
T R..21 Nm (2,1 m · kg, 15 ft · lb)
T R..21 Nm (2,1 m · kg, 15 ft · lb)
13. Monter:
Support de l’écran multifonction
1
Ecran multifonction 2
N.B.:
Passer les câbles des gaz 3, le câble
d’embrayage 4 et le câble du démarreur
à chaud 5 entre le support de l’écran
multifonction et le té supérieur.
T R..7 Nm (0,7 m · kg, 5,1 ft · lb)
T R..4 Nm (0,4 m · kg, 2,9 ft · lb)
14. Monter:
Support 1
Collier 2
N.B.:
Le monter de sorte que la marque a
sur le fil du capteur de vitesse soit ali-
gnée sur le bord du support.
Fixer le fil du capteur de vitesse sur le
support à l’aide du collier.
T R..13 Nm (1,3 m · kg, 9,4 ft · lb)
T R..7 Nm (0,7 m · kg, 5,1 ft · lb)
DIRECTION

7 - 1
–+ELECELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC600000
ELECTRICAL
NOTE:This section is intended for those who have basic knowledge and skill concerning the servicing of Yamaha motorcycles
(e.g., Yamaha dealers, service engineers, etc.) Those who have little knowledge and skill concerning servicing are
requested not to undertake inspection, adjustment, disassembly, or reassembly only by reference to this manual. It may
lead to servicing trouble and mechanical damage.
EC610000
ELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC611000ELECTRICAL COMPONENTS
1Headlight
2Multi-function display
3Engine stop switch
4Clutch switch
5Diode
6Starter relay diode7Throttle position sensor
8Starter relay
9Fuse
0Starting circuit cut-off relay
ACDI unit
BTaillightCNeutral switch
DStarter motor
EAC magneto
FRectifier/regulator
GIgnition coil
HSpark plugIStart switch
JMain switch
KSpeed sensor
LBattery

7 - 3
–+ELECELECTRICAL COMPONENTS AND WIRING DIAGRAM
EC612000WIRING DIAGRAM
1Headlight
2Multi-function display
3Engine stop switch
4Clutch switch
5Diode
6Starter relay diode
7Throttle position sensor
8Starter relay
9Fuse
0Starting circuit cut-off relay
ACDI unitBTaillight
CNeutral switch
DStarter motor
EAC magneto
FRectifier/regulator
GIgnition coil
HSpark plug
IStart switch
JMain switch
KSpeed sensor
LBatteryCOLOR CODE
B ...................... Black
Br ..................... Brown
Ch .................... Chocolate
Dg .................... Dark green
G...................... Green
Gy .................... Gray
L ...................... Blue
O...................... Orange
R ...................... RedSb .................... Sky blue
W ..................... White
Y ...................... Yellow
B/L ................... Black/Blue
B/W .................. Black/White
L/B ................... Blue/Black
L/R ................... Blue/Red
L/Y ................... Blue/Yellow
L/W .................. Blue/White
R/B................... Red/Black
R/W.................. Red/White

7 - 77
–+ELECSIGNALING SYSTEM
SIGNALING SYSTEM
INSPECTION STEPS
If the speedometer will not operate, use the following inspection steps.
*1 marked: Refer to “BATTERY INSPECTION AND CHARGING” section in the CHAPTER 3.
NOTE:•Remove the following parts before inspection.
1) Headlight
•Use the following special tools in this inspection.
Pocket tester:
YU-3112-C/
90890-03112
*1 Check battery. Recharge or replace.
Check each coupler and wire
connection.Repair or replace.
Check multi-function display. Input voltage Replace wire harness.
Output voltageReplace multi-function
display.
Check speed sensor.Replace.
OK
OK
OK
No good
No good
No good No good
No good

7 - 83
–+ELECSIGNALING SYSTEM
COUPLERS AND LEADS
CONNECTION INSPECTION
1. Check:
•Couplers and leads connec-
tion
Rust/dust/looseness/short-cir-
cuit
→ Repair or replace.
MULTI-FUNCTION DISPLAY INPUT
VOLTAGE INSPECTION
1. Disconnect the multi-function
display coupler.
2. Set the main switch to “ON”.
3. Measure:
•Multi-function display input
voltage
Out of specification
→
Replace wire harness.
CAUTION:
Make sure that a short-circuit
does not develop between the ter-
minals because it may cause dam-
age to electrical components.Tester (+) lead →
Brown lead 1

Tester (–) lead →
Black lead 2

Multi-function
display input
voltageTester
selector
position
10 V or more DCV-20
MULTI-FUNCTION DISPLAY
OUTPUT VOLTAGE INSPECTION
1. Disconnect the multi-function
display coupler.
2. Set the main switch to “ON”.CONTROLE DES CONNEXIONS
DES FICHES RAPIDES ET DES
FILS
1. Contrôler:
Connexion des fiches rapides et
des fils
Rouille/poussière/jeu/court-cir-
cuit → Réparer ou remplacer.
CONTROLE DE LA TENSION
D’ENTREE DE L’ECRAN
MULTIFONCTION
1. Déconnecter la fiche rapide de
l’écran multifonction.
2. Placer le contacteur à clé sur “ON”.
3. Mesurer:
Tension d’entrée de l’écran mul-
tifonction
Hors spécifications → Remplacer
le faisceau de fils.
ATTENTION:
Veiller à ce qu’aucun court-circuit ne
se produise entre les bornes car cela
risque d’endommager les composants
électriques.Fil (+) du multimètre → fil brun 1
Fil (–) du multimètre → fil noir 2
Tension d’entrée
de l’écran multi-
fonctionPosition du
sélecteur du
multimètre
Au moins
10 V20 V c.c.
CONTROLE DE LA TENSION DE
SORTIE DE L’ECRAN
MULTIFONCTION
1. Déconnecter la fiche rapide de
l’écran multifonction.
2. Placer le contacteur à clé sur “ON”.
SYSTEME DE SIGNALISATION

7 - 85
–+ELECSIGNALING SYSTEM
3. Measure:
•Multi-function display output
voltage
Out of specification
→
Replace multi-function display.
CAUTION:
Make sure that a short-circuit
does not develop between the ter-
minals because it may cause dam-
age to electrical components.Tester (+) lead →
Red lead 1

Tester (–) lead →

Black/White lead 2
Multi-function
display output
voltageTester
selector
position
4.5 V or more DCV-20
SPEED SENSOR OUTPUT
VOLTAGE INSPECTION
1. Insert the thin electric conduc-
tors
1 (lead) into the speed sen-
sor coupler
2, as shown, and
connect the tester to them.
CAUTION:
Do not insert the electric con-
ductors more than required
because it may reduce the
waterproof function of the cou-
pler.
Make sure that a short-circuit
does not develop between the
terminals because it may cause
damage to electrical compo-
nents.
2. Set the main switch to “ON”. Tester (+) lead →
White lead 3

Tester (–) lead →
Black lead 4

3. Mesurer:
Tension de sortie de l’écran mul-
tifonction
Hors spécifications → Remplacer
l’écran multifonction.
ATTENTION:
Veiller à ce qu’aucun court-circuit ne
se produise entre les bornes car cela
risque d’endommager les composants
électriques.Fil (+) du multimètre → fil rouge 1
Fil (–) du multimètre →
fil noir/blanc 2
Tension de sortie
de l’écran multi-
fonctionPosition du
sélecteur du
multimètre
Au moins
4,5 V20 V c.c.
CONTROLE DE LA TENSION DE
SORTIE DU CAPTEUR DE
VITESSE
1. Introduire les fins conducteurs élec-
triques 1 (fils) dans la fiche rapide
du capteur de vitesse 2, comme
illustré, et y raccorder le multimè-
tre.
ATTENTION:
Ne pas enfoncer les conducteurs
électriques plus que nécessaire; cela
risque en effet de réduire l’étan-
chéité de la fiche rapide.
Veiller à ce qu’aucun court-circuit
ne se produise entre les bornes car
cela risque d’endommager les com-
posants électriques.
2. Placer le contacteur à clé sur “ON”. Fil (+) du multimètre → fil blanc 3
Fil (–) du multimètre → fil noir 4
SYSTEME DE SIGNALISATION