Yamaha YZF-R1 Series Service Manual page 452

EAS30499
TROUBLESHOOTING
Any of the following fail to light: headlight, auxiliary light, high beam indicator light, tail/brake light, li-
cense plate light or meter light.
TIP
• Before troubleshooting, remove the following part(s):
1. Front side cowling/Front panel/Side cover
2. Passenger seat/Rider seat/Tail cover/Rear side cover
3. Headlight assembly
1. Check the fuses.
(Main, headlight, backup, ignition
and signaling system)
Refer to "CHECKING THE FUS-
ES" on page 8-41.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-42.
OK ↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-40.
OK ↓
4. Check the dimmer switch.
Refer to "CHECKING THE
SWITCHES" on page 8-40.
OK ↓
5. Check the Pass/LAP switch.
Refer to "CHECKING THE
SWITCHES" on page 8-40.
OK ↓
6. Check the entire lighting system's
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-15.
OK ↓
Replace the ECU, meter assembly,
headlight assembly, front turn signal/
position light, tail/brake light, license
plate light or auxiliary light.
Refer to "REPLACING THE ECU (En-
gine Control Unit)" on page 8-41.
NG →
Replace the fuse(s).
NG →
• Clean the battery terminals.
• Recharge or replace the battery.
NG →
Replace the main switch.
NG →
The dimmer switch is faulty. Replace the
handlebar switch (left).
NG →
The Pass/LAP switch is faulty. Replace the
handlebar switch (left).
NG →
Properly connect or repair the lighting sys-
tem's wiring.
8-17
LIGHTING SYSTEM