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

EFI Main Relay Inspection - Checking Continuity:

Inspect Relay Continuity
- Using an ohmmeter, check that there is continuity between terminals 1 and 3.
- Check that there is no continuity between terminals 2 and 4.
- If continuity is not as specified, replace the relay.

EFI Main Relay Inspection - Checking Operation:

Inspect Relay Operation
- Apply battery voltage across terminals 1 and 3.
- Using an ohmmeter, check that there is continuity between terminals 2 and 4.
- If operation is not as specified, replace the relay.