Fig. Fig. 1 Testing fuel pump relay1988-89 3S-GTE engine shown
Fig. Fig. 2 Testing fuel pump relay1990-93 3S-GTE engine shown
Using an ohmmeter, test for continuity between terminals 1 and 3. Continuity should be present.
There should also be continuity between terminals 2 and 3.
There should be no continuity between terminals 3 and 4.
Apply battery voltage and ground to terminals 1 and 3; with voltage applied, continuity should not be present at terminals 2 and 3.
Again apply battery voltage and ground to terminals 1 and 3; with voltage applied, continuity should be present at terminals 3 and 4.
If any test condition is not met, the relay must be replaced.