Fuel Injector: Testing and Inspection

2AZ-FE FUEL: FUEL INJECTOR: 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 : 09268-31012

09268-41500

90467-13001

95336-08070

(2) Install a new 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

90467-13001

95336-08070

09268-41110

09268-41300

(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

CAUTION:
Always switch the voltage on and off on the battery side, not the injector side.

If the injection volume is not as specified, replace the injector assembly.

(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.