Yamaha YZF-R1 Series Service Manual page 476

EAS30551
CHECKING THE FUSES
The following procedure applies to all of the fus-
es.
ECA13680
NOTICE
To avoid a short circuit, always set the main
switch to "OFF" when checking or replacing
a fuse.
1. Remove:
• Passenger seat/Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Front panel (left)
Refer to "GENERAL CHASSIS (3)" on page
4-9.
2. Check:
• Fuse
a. Connect the digital circuit tester to the fuse
and check the continuity.
TIP
Set the digital circuit tester selector to " Ω ".
Digital circuit tester (CD732)
90890-03243
Model 88 Multimeter with ta-
chometer
YU-A1927
b. If the digital circuit tester indicates "O.L",
replace the fuse.
3. Replace:
• Blown fuse
a. Set the main switch to "OFF".
b. Install a new fuse of the correct amperage
rating.
c. Set on the switches to verify if the electri-
cal circuit is operational.
d. If the fuse immediately blows again, check
the electrical circuit.
Fuses
Main
Headlight
Signaling system
Ignition
Radiator fan motor
Sub radiator fan motor
Hazard
Fuel injection system
ABS motor
Amperage
Q'ty
rating
50 A 1
7.5 A 1
7.5 A 1
15 A 1
15 A 1
10 A 1
7.5 A 1
15 A 1
30 A 1
8-41
ELECTRICAL COMPONENTS
Fuses
ABS ECU
ABS solenoid
Auxiliary
Backup
Electronic throttle valve
SCU (for YZF-R1M)
Spare
Spare
Spare
Spare
Spare
EWA13310
WARNING
Never use a fuse with an amperage rating
other than that specified. Improvising or us-
ing a fuse with the wrong amperage rating
may cause extensive damage to the electri-
cal system, cause the lighting and ignition
systems to malfunction and could possibly
cause a fire.
4. Install:
• Rider seat/Passenger seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Front panel (left)
Refer to "GENERAL CHASSIS (3)" on page
4-9.
EAS31006
REPLACING THE ECU (Engine Control Unit)
1. Turn the main switch to "OFF".
2. Replace the ECU (Engine Control Unit).
3. Clean the throttle bodies and reset the ISC
(Idle Speed Control) learning value.
Refer to "CHECKING AND CLEANING THE
THROTTLE BODIES" on page 7-15.
4. Check:
• Engine idling speed
Start the engine, warm it up, and then mea-
sure the engine idling speed.
Engine idling speed
1200–1400 r/min
Amperage
Q'ty
rating
7.5 A 1
15 A 1
2 A 1
7.5 A 1
7.5 A 1
7.5 A 1
30 A 1
15 A 1
10 A 1
7.5 A 1
2 A 1