LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2003 >> Echo L4-1.5L (1NZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Main Relay (Computer/Fuel System) >> Testing and Inspection
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

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

INSPECTION




1. REMOVE EFI MAIN RELAY (Marking: EFI)

2. INSPECT EFI MAIN RELAY CONTINUITY




a. Using an ohmmeter, check that there is continuity between terminals 1 and 2.

If there is no continuity, replace the relay.

b. Check that there is no continuity between terminals 3 and 5.

If there is continuity, replace the relay.

3. INSPECT EFI MAIN RELAY OPERATION




a. Apply battery voltage across terminals 1 and 2.
b. Using an ohmmeter, check that there is continuity between terminals 3 and 5.

If there is no continuity, replace the relay.

4. REINSTALL EFI MAIN RELAY