Service manual

FUEL SYSTEM (DFI) 3-67
Fuel Injectors
•
Install the delivery pipe [A] on the throttle body assy.
•
Tighten:
Torque - Delivery P ipe Mounting Screws [B]: 5.0 N·m (0.51
kgf·m, 44 in·lb)
Audible Inspection
•
Start the engine.
•
Apply the tip of a screwdriver [A] to the injector [B]. Put
the grip end onto y our ear, and listen whether the injector
is clicking or not.
○
A sound scope [C] can also be used.
•
Dothesamefortheotherinjectors.
If all the injectors click at a regular intervals, the injec-
tors are good. The trouble may be related to the fuel line,
requiring fuel pressure inspection (see Fuel Pressure In-
spection).
○
The click interval becomes shorter as the engine speed
rises.
If any injector(s) doesn’t click, the DFI circuit or the injector
is suspect. Perform “Fuel Injector Power Source Voltage
Inspection”, first.
Fuel Injector Power Source Voltage Inspection
•
Disconnect the injector connector [A] and connect the in-
sulated auxiliary leads [B] between injector [C] and injec-
tor connector.
CAUTION
Do not short each terminals.
•
Connect a digital meter [D] as shown.
Injector Power Source Voltage
Connections to injector
Meter (+) → W/R lead
Meter (–) → Battery (–) Terminal
•
Measure the power source voltage with the engine
stopped, and with the connector joined.
•
Turn the engine stop switch to run position.
•
Turn the ignition switch ON.
Power Source Voltage at Injector
Standard: Battery Voltage for 3 second, and then 0 V
•
Turn the ignition switch OFF.