Fuel Injector: Testing and Inspection

1NZ-FXE FUEL: FUEL INJECTOR: INSPECTION

INSPECTION

1. INSPECT FUEL INJECTOR ASSEMBLY





(a) Measure the resistance between the terminals.
Standard resistance:
13.45 to 14.15 Ohms at 21°C (70°F)
If the resistance is not as specified, replace the fuel injector assembly.
(b) Inspect the injection volume.
CAUTION: Perform the test in a well-ventilated area away from flames.




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




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




(5) Set the fuel injector to a graduated cylinder.
(6) Operate the fuel pump Testing and Inspection.
(7) Install SST to the fuel injector.
SST: 09842-30080
(8) Connect SST to the battery, then measure the injection volume for 15 seconds. Perform the inspection 2 or 3 times, then calculate the average.
Standard injection volume:





NOTE: Always turn the voltage on and off on the battery side, not the fuel injector side.

If the injection volume is not as specified, replace the fuel injector assembly.
(c) Inspect the fuel leakage.




(1) In the condition that the injection volume was inspected, remove SST from the battery. Inspect the fuel leakage from the fuel injector.
Standard fuel drop:
1 drop or less per 12 minutes
If the fuel leakage is not as specified, replace the fuel injector assembly.