2006 YAMAHA TTR90 fuse

SPEC
2 - 16 Starter relay:
Model/manufacturer MS5F-751/JIDECO ----
Amperage rating 180 A ----
Coil winding resistance 4.2 ~ 4.6 Ω at 20 °C (68 °F) ----
Starting circuit cut-off relay:
Model/manufacturer ACM33221/MATSUSHITA ----
Coil winding resistance 75.69 ~ 92.51 Ω at 20 °C (68 °F) ----
Fuse (amperage × quantity):
Main fuse 10 A × 1 ----
Reserve fuse 10 A × 1 ---- Item Standard Limit
MAINTENANCE SPECIFICATIONS

3 - 30
INSP
ADJ
FUSE INSPECTION (TT-R90E)
6. Install:
Battery
7. Check:
Battery terminals
Dirt → Clean with a wire brush.
Loose connection → Connect properly.
8. Lubricate:
Battery terminal
9. Connect:
Battery lead coupler
(to the battery terminals)
10. Install:
Rear fender
Seat
Recommended lubricant:
Lithium soap base grease
FUSE INSPECTION (TT-R90E)
CAUTION:
To avoid a short circuit, always set the
main switch to “OFF” when checking or
replacing a fuse.
1. Remove:
Seat
Rear fender
2. Check:
Continuity
2Reserve fuse
Checking steps:
Remove the fuse 1
.
Connect the pocket tester to the fuse and
check the continuity.
NOTE:
Set the pocket tester selector to “Ω × 1”.
Pocket tester:
YU-03112-C/90890-03112
If the pocket tester indicates “∞”, replace
the fuse.
1 2

3 - 31
INSP
ADJ
FUSE INSPECTION (TT-R90E)
3. Replace:
Blown fuse
WARNING
Never use a fuse with an amperage rating
other than that specified. Improvising or
using a fuse with the wrong amperage rat-
ing may cause extensive damage to the
electrical system, cause the starting and
ignition systems to malfunction and could
possibly cause a fire.
4. Install:
Rear fender
Seat Replacement steps:
Set the main switch to “OFF”.
Install a new fuse of the correct amperage.
Set on the switches to verify if the electri-
cal circuit is operational.
If the fuse immediately blows again, check
the electrical circuit.
ItemsAmperage
ratingQ’ty
Main fuse 10 A 1

6 - 2
–+ELEC
12
3
456
7
0
98
A
B
F
EC
D
ELECTRICAL COMPONENTS AND WIRING DIAGRAM
TT-R90E
EC611000
ELECTRICAL COMPONENTS
1Main switch
2“ENGINE STOP”
switch
3Thermo switch
4Ignition coil
5CDI unit
6Battery
7Rectifier/regulator
8Neutral switch9CDI magneto
0Carburetor heater
AStarter relay
BFuse
CStart switch
DSpark plug
EStarter motor
FStarting circuit cut-off
relayCOLOR CODE
B ...................... Black
Br .................... Brown
G ..................... Green
O ..................... Orange
R ..................... Red
Sb .................... Sky blue
W ..................... White
Y ...................... Yellow
EC612000
WIRING DIAGRAM
G/WB/RW/LW/RBr G
RW
B/WBr BRB/WBBrR
B/WB/WBB
BR/WBr B
GG/W
B/W
B/W
BrB/RWWOO
B
BW/LY/RR
W
B
B
R
W/RY/R
OFF RUNB
Y/R
Y
Y
OBO BY/RYB B
Sb
W W
Sb
ON OFF
OFFON
Y
BBY/R
Br
Br
B
B
R
RR
R
B
R/WR/W
R/WR/W
R/W
Sb
Sb
RB
R/WB R
Y/RRB W
B/WB
R/W
R/W
R/W
Sb
9
8
1 B5
4
D
2 3
=A
E 6
C
F 7
B/R ................... Black/Red
B/W .................. Black/White
G/W.................. Green/White
R/W .................. Red/White
W/L .................. White/Blue
W/R .................. White/Red
Y/R ................... Yellow/Red

6 - 7
–+ELEC
ELECTRIC STARTING SYSTEM
(TT-R90E)
STARTING CIRCUIT CUT-OFF SYSTEM
OPERATION
If the main switch is set to “ON”, the starter
motor can only operate if the following condi-
tion is met:
The transmission is in neutral (the neutral
switch is closed).
The starting circuit cut-off relay prevents the
starter motor from operating when this condi-
tion has not been met. In this instance, the
starting circuit cut-off relay is open so current
cannot reach the starter motor. When the
above condition has been met the starting cir-
cuit cut-off relay is closed and the engine can
be started by pressing the start switch.
WHEN THE TRANSMISSION IS
IN NEUTRAL
1Battery
2Main fuse
3Main switch
4Start switch
5Starting circuit cut-off relay
6Neutral switch
7Starter relay
8Starter motor
12
M
3
7
54
6 8
ELECTRIC STARTING SYSTEM (TT-R90E)

–+ELEC
6 - 8 INSPECTION STEPS
If the starter motor will not operate, use the following inspection steps.
*1 marked: Refer to “FUSE INSPECTION” section in the CHAPTER 3.
*2 marked: Refer to “BATTERY INSPECTION AND CHARGING” section in the CHAPTER 3.
*3 marked: Refer to “MAIN SWITCH INSPECTION” section.
NOTE:
Remove the following parts before inspection.
1) Seat
2) Rear fender
3) Fuel tank
Use 12 V battery in this inspection.
Use the following special tools in this inspection.
Pocket tester:
YU-3112-C/90890-03112
*1 Check fuse.Replace fuse and
check wire harness.
*2 Check battery. Recharge or replace.
Check each coupler and
wire connection.Repair or replace.
*3 Check main switch. Replace.
Check starter motor
operation.Repair or replace.
Check starting circuit
cut-off relay.Replace.
Check starter relay. Replace.
Check neutral switch. Replace.
Check start switch. Replace.
OK
OK
OK
OK
OK
OK
OK
OK
No good
No good
No good
No good
No good
ELECTRIC STARTING SYSTEM (TT-R90E)
No good
No good
No good
No good

–+ELEC
6 - 15
CHARGING SYSTEM (TT-R90E)
EC680000
CHARGING SYSTEM (TT-R90E)
EC681001
INSPECTION STEPS
If the battery is not charged, use the following inspection steps.
*1 marked: Refer to “FUSE INSPECTION” section in the CHAPTER 3.
*2 marked: Refer to “BATTERY INSPECTION AND CHARGING” section in the CHAPTER 3.
NOTE:
Remove the following parts before inspection.
1) Seat
2) Rear fender
3) Fuel tank
Use the following special tool in this inspection.
Pocket tester:
YU-3112-C/90890-03112Inductive tachometer:
YU-8036-B
Engine tachometer:
90890-03113
*1 Check fuse.Replace fuse and
check wire harness.
*2 Check battery. Recharge or replace.
Check each coupler and
wire connection.Repair or replace.
Check charging voltage.Charging system is
good.
Check CDI magneto. Lighting coil Replace.
Replace rectifier/regulator.
OK
OK
OK
No good
OK
No good
OK
No good
No good
No good