Fuel Injector: Testing and Inspection

1ZZ-FE FUEL: FUEL INJECTOR: INSPECTION

INSPECTION

1. INSPECT FUEL INJECTOR ASSEMBLY





(a) Check the resistance.
(1) Using an ohmmeter, measure the resistance between the terminals.
Standard resistance:





If the result is not as specified, replace the fuel injector.
(b) Inspect the injector injection volume.

CAUTION: Keep the injector away from sparks during this test.





(1) Connect SST (fuel tube connector) to SST (hose), then connect them to the fuel pipe (the vehicle side).
SST: 09268-31012
09268-41500
90467-13001
95336-08070





(2) Install the O-ring to the fuel injector.
(3) Connect SST (adapter and hose) to the injector, and hold the injector and union with SST (clamp).
SST: 09268-31012
09268-41110
09268-41300
90467-13001





(4) Put the fuel injector into the graduated cylinder.

CAUTION: Install a suitable vinyl tube onto the injector to contain gasoline spray.

(5) Operate the fuel pump (Testing and Inspection).
(6) Install SST onto the fuel injector.
SST: 09842-30080
(7) Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.
Standard volume:





NOTE: Always do the switching at the battery side.

HINT: If the result is not as specified, replace the fuel injector.





(c) Inspect the fuel leakage.
(1) Disconnect the SST (wire) tester probes from the battery and check the fuel leakage from the injector.
Standard:
1 drop or less every 12 minutes

HINT: If the result is not as specified, replace the fuel injector.

(2) Turn the ignition switch off.
(3) Disconnect the cable from the negative (-) battery terminal.
(4) Remove the SST.
(5) Reconnect the fuel main tube to the fuel pipe.