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

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