Fuel Injector: Testing and Inspection

2AZ-FE FUEL: FUEL INJECTOR: INSPECTION

INSPECTION

1. INSPECT FUEL INJECTOR ASSEMBLY





(a) Measure the resistance between the injector terminals.
Standard resistance:
11.6 to 12.4 Ohms at 20°C (68°F)
If the result is not as specified, replace the injector.
(b) Inspect the injector injection.
CAUTION: Keep the injector away from sparks during the test.




(1) Connect SST (fuel tube connector) to SST (hose), then connect them to the fuel pipe (vehicle side).
SST: 09268-31011
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: 09268-31011
09268-41110
09268-41130
09268-41310
(4) Put the injector into the graduated cylinder.
CAUTION: Install a suitable vinyl tube onto the injector to contain gasoline spray.
(5) Operate the fuel pump.




(6) Connect SST (wire) to the injector and the battery for 15 seconds, and measure the injection volume with the graduated cylinder. Test each injector 2 or 3 times.
SST: 09842-30080
Standard injection volume:
76 to 92 cm3 (4.6 to 5.6 cu in.) per 15 seconds
Standard difference between each injector:
16 cm3 (1.0 cu in.) or less
(c) Inspect the fuel leakage.




(1) Disconnect the SST (wire) tester probes from the battery and check for the fuel leakage from the injector.
Standard fuel drop:
1 drop or less per 12 minutes
(2) Turn the ignition switch OFF.
(3) Disconnect the cable from the negative (-) battery terminal.
(4) Remove SST.
(5) Reconnect the fuel inlet hose (rear fuel pipe) to the fuel main tube.