Operation CHARM: Car repair manuals for everyone.

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




1. REMOVE EFI MAIN RELAY

2. INSPECT EFI MAIN RELAY




A. Inspect relay continuity
- Using an ohmmeter, check that there is continuity between terminals 1 and 2.
- If there is no continuity, replace the relay.
- Check that there is no continuity between terminals 3 and 5.
- If there is continuity. replace the relay.




B. Inspect relay operation
- Apply battery positive voltage across terminals 1 and 2.
- Using an ohmmeter, check that there is continuity between terminals 3 and 5.
- If there is no continuity, replace the relay.
3. REINSTALL EFI MAIN RELAY