Component Test

ON-VEHICLE INSPECTION





1. INSPECT INJECTOR OPERATION
Check operation sound from each injector.
(a) With the engine running or cranking, use a sound scope to check that there is normal operating noise in proportion to engine rpm.





(b) If you have no sound scope, you can check the injector transmission operation with a screwdriver.
If no sound or an unusual sound is heard, check the wiring connector, injector, resistor, or injection signal from ECU.





2. INSPECT INJECTOR RESISTANCE
(a) Remove the throttle body.
(b) Disconnect the injector connector.
(c) Using an ohmmeter, measure the resistance between the terminals.

Resistance: 2 - 4 ohms

If resistance is not as specified, replace the injector.
(d) Reconnect the injector connector.
(e) Reinstall the throttle body.

OFF-VEHICLE INSPECTION OF INJECTORS

1. INSPECT INJECTOR INJECTION

WARNING: Keep clear of sparks during the test.





(a) Disconnect the fuel hose from the fuel filter outlet.
(b) Connect the SST (union and hose) to the fuel filter outlet two new gaskets and the union bolt.

SST 0926841045





NOTE: Use the vehicle's fuel filter.





(c) Connect the fuel return hose and SST (union) to the pressure regulator with SST (union).

SST 09268-41045





(d) Connect SST (union and hose) to the injector, and hold the injector and SST (union) with SST (clamp).

SST 09268-41045

(e) Put the injector into the graduated cylinder.

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





(f) Reconnect the battery negative (-) cable.
(g) Using a service wire, short terminals +B and FP of the check connector.
(h) Turn the ignition switch ON.

NOTE: Do not start the engine.





(i) Connect SST (wire) to the injector and battery for 15 seconds, and measure the injection volume with a graduated cylinder. Test each injector two or three times.

SST 09842-30060

Volume:
104 - 110 cc (6.3 - 6.7 Cu in.) per 15 sec.

Difference between each injector:
5 cc (0.31 Cu in.) or less

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





2. INSPECT LEAKAGE
(a) In the condition above, disconnect the test probes of SST (wire) from the battery and check the fuel leakage from the injector.

SST 09842-30060

Fuel drop: One drop or less per minute

(b) Disconnect the battery negative (-) cable.
(c) Remove SST and the service wire.

SST 09268-41045