Pair Control Solenoid Valve Inspection; Pair Check Valve Replacement - Honda GL1800 Service Manual

FUEL SYSTEM (Programmed Fuel Injection)
Remove the air cleaner housing (page 5-57).
Temporarily install the fuel tank.
Connect the ECM, IAT sensor and BARO sensor
connectors.
Start the engine and open the throttle slightly to be
certain that air is sucked in through the No. 15 air
supply hose.
If air is not drawn in, check the air supply hoses for
clogs and the PAIR control solenoid valve.
PAIR CONTROL SOLENOID VALVE
INSPECTION
Remove the air cleaner housing (page 5-57).
Disconnect the 2P connector and air supply hoses
from the PAIR control solenoid valve and remove
the solenoid valve.
Check air flow from hose fitting (A) (input port) to
hose fitting (B) (output port). Air should flow out.
Connect a 12-V battery to the solenoid valve
connector.
CONNECTION:
Battery (+) – Black/yellow wire terminal
Battery (–) – Orange/green wire terminal
Air should not flow when the battery is connected.
Install the PAIR control solenoid valve in the reverse
order of removal.

PAIR CHECK VALVE REPLACEMENT

Remove the engine from the frame (section 7).
Remove the 12 bolts, intake manifold from the cylin-
der heads and gaskets.
5-72
o. 15 AIR SUPPLY HOSE
AIR CONTROL SOLENOID VALVE
(B)
AIR CONTROL SOLENOID VALVE
INTAKE MANIFOLD
OLTS
GASKETS
(B)
(A)