Corolla Wagon 4WD L4-96.8 1587cc 1.6L DOHC (4A-FE) (1990)
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EFI Main Relay: Testing and Inspection
1. Unplug the EFI Main Relay from the fuse panel.
2. Using an Ohmmeter, check for continuity between terminals 1 and 3.
Checking EFI Main Relay
3. Check that there is NO continuity between terminals 2 and 4 or terminals 3 and 4.
4. If not as specified, replace the EFI Main Relay.
5. Apply battery current across terminals 3 and 4.
Testing EFI Main Relay Operation
6. Using an Ohmmeter, check for continuity between terminals 1 and 2.
7. If operation is not as specified, replace the EFI Main Relay.
8. Remove the battery leads and reinstall the relay.
NOTE: Refer to ECU POWER SUPPLY for circuit test of the EFI Main Relay.