Main Relay (Computer/Fuel System): Testing and Inspection

1. REMOVE EFI MAIN RELAY (Marking: EFI MAIN)

LOCATION: In the engine compartment relay box.

2. INSPECT EFI MAIN RELAY CONTINUITY





a. Using an ohmmeter, check that there is continuity between terminals 1 and 3.
If there is no continuity, replace the relay.
b. Check that there is no continuity between terminals 2 and 4.
If there is continuity, replace the relay.

3. INSPECT EFI MAIN RELAY OPERATION
a. Apply battery voltage across terminals 1 and 3.





b. Using an ohmmeter, check that there is continuity between terminals 2 and 4.
If there is no continuity, replace the relay.

4. REINSTALL EFI MAIN RELAY