F1251 1
EFI SYSTEM — Fuel System
FI-55
Injectors
Connector Terminal
Needle Valve
INLET
INJECTION
Coil
F12478
I
N-VEHICLE INSPECTION
INSPECT INJECTOR OPERATION
Check operation sound from each injector.
(a)
With the engine running or cranking, use a sound
scope to check that there is normal operating noise
in proportion to engine rpm.
(b)
If you have no sound scope, you can check the
injector transmission operation with your finger.
If no sound or an unusual sound is heard, check the
wiring connector, injector or injection signal from ECU.
2.
INSPECT INJECTOR RESISTANCE
(a)
Disconnect the injector connector.
(b)
Using an ohmmeter, measure the resistance be-
t
ween the terminals.
Resistance: Approx. 13.8 S2
If the resistance is not as specified, replace the injector.
(c)
Reconnect the injector connector.
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