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)

(b) If the result is not as specified, replace the injector.

(c) Inspect the injector injection volume.

CAUTION:

* This test involves high-pressure fuel and electricity.

* Take every precaution regarding safe handling of both the fuel and the electricity.

* Perform this test in a safe area, and avoid any sparks or flame.

* Do not smoke.

(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

CAUTION:

Always read the precautions Fuel System before connecting the fuel tube connector (quick type).

(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 injector into the graduated cylinder.

CAUTION:

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

(5) Operate the fuel pump Initial Inspection and Diagnostic Overview.

(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 cc (4.6 to 5.6 cu.in.) per 15 seconds

Standard difference between each injector:

16 cc (1.0 cu.in.) or less

NOTICE:

Always turn on and off the voltage on the battery side, not the fuel pump side.

(d) Inspect the fuel leakage.





(1) Disconnect the SST (wire) tester probes from the battery and check 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 the SST.

(5) Disconnect the Techstream from the DLC3.

(6) Reconnect the fuel inlet hose (rear fuel pipe) to the fuel main tube.