Fuel Injector: Testing and Inspection

2UZ-FE FUEL: FUEL INJECTOR: INSPECTION

INSPECTION

1. INSPECT FUEL INJECTOR ASSEMBLY
(a) Inspect the injector resistance.
(1) Using an ohmmeter, measure the resistance between the terminals.
Standard resistance:
13.4 to 14.2 Ohms at 20°C (68°F)
If the resistance is not as specified, replace the injector.
(b) Inspect the injector.




CAUTION:
Avoid any sparks or flame during the test.




(1) Install the SST (fuel tube connector) to SST (hose), then connect the fuel pipe.
SST: 09268-31012
09268-41500
95336-08070
(2) Remove the pressure regulator from the delivery pipe.
(3) Install the O-ring to the fuel inlet of the pressure regulator.




(4) Connect the SST (hose) to the fuel inlet of the pressure regulator with another SST (union) and the 2 bolts.
SST: 09268-31012
09268-41091
95336-08070
Torque: 7.5 Nm (80 kgf-cm, 66 in-lbf)
(5) Connect the fuel return hose to the fuel outlet of the pressure regulator.




(6) Install the O-ring to the injector.
(7) Connect SSTs (union and hose) to the injector, and hold the injector and union with another SST (clamp).
SST: 09268-31012
09268-41110
09268-41300
95336-08070
(8) Put the injector into a graduated cylinder.
CAUTION:
Install a suitable vinyl tube onto the injector to prevent gasoline from splashing out.
(9) Operate the fuel pump Testing and Inspection.





(10) 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.
SST: 09842-30070
Volume:
56 to 69 cm3 (3.4 to 4.2 cu in.) per 15 seconds
Difference between each injector:
13 cm3 (0.8 cu in.) or less
If the injection volume is not as specified, replace the injector.





(c) Check for leakage.
(1) In the condition above, disconnect the tester probes of the SST (wire) from the battery and check for fuel leakage from the injector.
SST: 09842-30070
Fuel drop:
1 drop or less per 12 minutes