Injector On-Vehicle Inspection - Toyota T100 1996 Service Manual

MF−16
Sound Scope
1996 TOYOTA T100 (RM449U)
MFI (3RZ−FE)
INJECTOR
ON−VEHICLE INSPECTION
1.
Check operation sound from each injector.
P25104
If no sound or unusual sound is heard, check the wiring connec-
tor, injector or injection signal from the ECM.
P24765
2.
Ohmmeter
(a)
(b)
(c)
If the resistance is not as specified, replace the injector.
P25103
(d)
(e)
− INJECTOR
INSPECT INJECTOR OPERATION
(1) With the engine running or cranking, use a sound
scope to check that there is normal operating noise
in proportion to engine speed.
(2) If you have no sound scope, you can check the in-
jector transmission operation with your finger.
INSPECT INJECTOR RESISTANCE
Remove the throttle body.
(See page MF−28)
Disconnect the injector connectors.
Using an ohmmeter, measure the resistance between the
terminals.
Resistance:
12 − 16 Ω at 20°C (68°F)
Reconnect the injector connectors.
Reinstall the throttle body.
(See page MF−30)
Author :
SF0AP−03
968
Date :