Yamaha YZF-R1 Series Service Manual page 458

3. Check the entire signaling sys-
tem's wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-19.
OK ↓
Replace the meter assembly, front turn
signal/position light or rear turn signal
light.
The neutral indicator light fails to come on.
1. Check the neutral switch.
Refer to "CHECKING THE
SWITCHES" on page 8-40.
OK ↓
2. Check the relay unit (diode).
Refer to "CHECKING THE RELAY
UNIT (DIODE)" on page 8-43.
OK ↓
3. Check the entire signaling sys-
tem's wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-19.
OK ↓
Replace the meter assembly.
The oil pressure and coolant temperature warning light fails to come on, or the oil pressure warning icon
flashes when the main switch is set to "ON".
1. Check the entire signaling sys-
tem's wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-19.
OK ↓
2. Disconnect the oil pressure switch
lead from the oil pressure switch,
and then check whether the oil
pressure and coolant temperature
warning light comes on when the
lead is connected to the engine
ground.
OK ↓
Replace the oil pressure switch.
SIGNALING SYSTEM
NG →
Properly connect or repair the signaling
system's wiring.
NG →
Replace the neutral switch.
NG →
Replace the relay unit.
NG →
Properly connect or repair the signaling
system's wiring.
NG →
Properly connect or replace the wiring har-
ness.
NG →
Replace the meter assembly.
8-23