Fuel Injector: Testing and Inspection

1. INSPECT INJECTOR RESISTANCE




Using an ohmmeter, measure the resistance between the terminals.
Resistance: Approx. 13.8 ohms at 20 °C (68 °F)
If the resistance is not as specified, replace the injector.




2. INSPECT INJECTOR INJECTION

CAUTION: Keep injector clear of sparks during the test.

a. Disconnect the fuel inlet pipe from the fuel tube.
b. Connect SST (attachment and hose) to the fuel tube.
SST 09268-41047 (09268-52011)
c. Connect the fuel return hose, SST (union) and SST (hose) to the fuel pressure regulator.
SST 09268-41047 (09268-41091)




d. Connect SST (hose) to the injector.
SST 09268-41047
e. Put the injector into the graduated cylinder.

HINT: Install a suitable vinyl hose onto the injector to prevent gasoline from splashing out.

f. Connect a TOYOTA hand-held tester to the DLC3.




g. Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector 2 or 3 times.
SST 09842-30070
Volume: 56 - 69 Cu.cm (3.4 - 4.2 cu in.) per 15 sec
.
Difference between each injector: 1.3 Cu.cm (0.08 cu in.) or less
If the injection volume is not as specified, replace the injector.




3. INSPECT LEAKAGE
a. In the condition above, disconnect the tester probes of SST (wire) from the battery and check the fuel leakage from the injector.
SST 09842-30070

Fuel drop: 1 drop or less per 12 minutes

b. Turn the ignition switch OFF.
c. Disconnect the negative (-) terminal cable from the battery.
d. Remove the SST.
SST O9268-41047, 09842-30070
e. Disconnect the TOYOTA hand-held tester from the DLC3.