Component Test

EFI Main Relay Circuit:

INSPECTION OF ELECTRONIC FUEL INJECTION (EFI) MAIN RELAY






1. CHECK OPERATION OF MAIN RELAYS.
Turn the ignition switch ON. At this time an operation noise will occur from the relay.






2. INSPECT RELAY CONTINUITY.
a. Check that there is continuity between terminals 1 and 3.
b. Check that there is no continuity between terminals 2 and 4.
c. Check that there is no continuity between terminals 3 and 4.

If continuity is not as specified, replace the relay.






3. INSPECT RELAY OPERATION.
a. Apply battery voltage across terminals 1 and 3.
b. Check that there is continuity between terminals 2 and 4.

If operation is not as specified, replace the relay.