Yamaha YZF-R25 Service Manual page 368

Replace the meter assembly.
The neutral indicator light fails to come on.
1. Check the gear position switch.
Refer to "CHECKING THE GEAR
POSITION SWITCH" on page 8-93.
OK ↓
2. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-19.
OK ↓
Replace the meter assembly.
The oil pressure warning light fails to come on when the main switch is set to "ON".
1. Check the entire signaling system
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 warning light comes on
when the lead is connected to the
engine ground.
OK ↓
Replace the oil pressure switch.
The oil pressure warning light remains on after the engine is started.
1. Check the entire signaling system
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-19.
OK ↓
2. Check the engine oil pressure.
Refer to "CHANGING THE EN-
GINE OIL" on page 3-22.
OK ↓
NG →
Replace the gear position switch.
NG →
Properly connect or replace the wiring har-
ness.
NG →
Properly connect or replace the wiring har-
ness
NG →
Replace the meter assembly.
NG →
Properly connect or replace the wiring har-
ness.
NG →
Check the engine oil leakage, oil viscosity,
oil seal, oil filter, or oil pump.
8-23
SIGNALING SYSTEM