A drain hose is connected to the bottom of the air cleaner to drain water or oil accumulated in the cleaner part.
If any water or oil accumulates in the hose, remove the plug [B] from the drain hose and drain it.

| WARNING Oil on tires will make them slippery and can cause an accident and injury. Be sure to reinstall the plug in the drain hose after draining. |
Air Cleaner Element Inspection
Air Cleaner Housing RemovalFuse Inspection
Remove the fuse.
Inspect the fuse element.
If it is blown out, replace the fuse. Before replacing a
blown fuse, always check the amperage in the affected
circuit. If the amperage is equal to or greater than the
fuse rating, check the wiring and related components for
a short circuit.
...
Subthrottle Sensor Output Voltage Inspection
Measure the output voltage at the subthrottle sensor in
the same way as input voltage inspection, note the following.
Disconnect the subthrottle sensor connector and connect
the setting adapter [A] between these connectors.
Special Tool - Throttle Sensor Setting Adapter: 57001
-1538
...
Diode Circuit Inspection
Remove the relay box (see Relay Box Removal).
Check conductivity of the following pairs of terminals (see
Relay Box Internal Circuit in this section).
Diode Circuit Inspection
The resistance should be low in one direction and more
than 10 times as much in the other direction. If any dio ...