Fuel Injectors (#1, #2: Service Code 41, 42)
Push and pull [A] the fuel hose joint #2 [B] back and
forth more than two times and make sure it is locked and
doesn't come off. When the fuel hose joint #2 is correctly
installed, it should slide on the delivery pipe about 5 mm
Make sure the fuel hose joint is installed correctly
on the delivery pipe by sliding the joint, or the fuel
Install the fuel tank (see this chapter) and connect the
battery (−) terminal.
Remove the left air cleaner housing (see this chapter).
Start the engine.
Apply the tip of a screwdriver [A] to the injector [C]. Put
the grip end onto your ear, and listen whether the injector
is clicking or not.
A sound scope [B] can also be used.
Do the same for the other injector.
If all the injectors click at a regular intervals, the injectors
are good. The trouble may be related to the fuel line,
requiring fuel pressure inspection (see Fuel Line section
in this chapter).
The click interval becomes shorter as the engine speed
If either injector doesn't click, the DFI circuit or the injector
is suspect. Perform "Power Source Voltage Inspection",
Power Source Voltage Inspection
Be sure the battery is fully charged.
Turn the ignition SW OFF.
Remove the coolant reserve tank (see Cooling System
Connect a digital voltmeter [B] to the DFI main relay con-
nector [A], using the needle adapter.
Battery [C] in the frame
Special Tool - Needle Adapter Set: 57001–1457
Measure the power source voltage of the injector with the
engine stopped, and with the connectors joined.
Turn the ignition SW ON.
Injector Power Source Voltage at DFI Main Relay
Meter (+) → W/R Lead Terminal [D]
Meter (–) → Battery (–) Terminal
Power Source Voltage at DFI Main Relay
(12.5 V or more)
FUEL SYSTEM (DFI) 3-69