Fuel Injector: Testing and Inspection

1. INSPECT INJECTOR RESISTANCE





- Using an ohmmeter, measure the resistance between the terminals.

Resistance: At 20°C (68°F): Approx. 13.8 ohms.

- If the resistance is not as specified, replace the injector.
2. INSPECT INJECTOR INJECTION

CAUTION: Keep injector clear of sparks during the test.





- Disconnect the fuel inlet pipe from the fuel tube.
- Connect SST (attachment and hose) to the fuel tube.
SST 09268-41046 (09268-52011)
- Connect the fuel return hose, SST (union) and SST (hose) to the fuel pressure regulator. SST 09268-41046 (09268-41091)





- Install the O-ring to the injector.
- Connect SST (union and hose) to the injector, and hold the injector and union with SST (clamp). SST 09268-41046
- Put the injector into the graduated cylinder.

HINT: Install a suitable vinyl hose onto the injector to prevent gasoline from splashing out.

- Connect the TOYOTA hand-held tester to the DLC3.

(See on-vehicle inspection in fuel pump)





- Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with a graduated cylinder.
- Test each injector 2 or 3 times. SST 09842-30070

Volume: 55-70 cu.cm (3.3-4.3 cu.in.) per 15 sec.

Difference between each injector:
6 cu.cm (0.4 cu.in.) or less

- If the ignition volume is not as specified, replace the injector.





3. INSPECT LEAKAGE
- In the condition above, disconnect the test probes of SST (wire) from the battery and check the fuel leakage from the injector.
SST 09842-30070

Fuel drop: 1 drop or less per minute

- Turn the ignition switch to LOCK.
- Disconnect the negative (-) terminal cable from the battery.
- Remove SST: SST 09268-41045
- Disconnect the TOYOTA hand-held tester from the DLC3.