toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

EFI Main Relay <--> [Main Relay (Computer/Fuel System)] > < Fuel Pump Relay
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Fuel Pump Relay: Testing and Inspection
Circuit Opening Relay

INSPECTION

1. REMOVE RELAY BOX COVER
2. REMOVE CIRCUIT OPENING RELAY (Marking: C/O)

3. INSPECT CIRCUIT OPENING 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.

4. INSPECT CIRCUIT OPENING RELAY OPERATION

a. Apply battery positive 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.

5. REINSTALL CIRCUIT OPENING RELAY
6. REINSTALL RELAY BOX COVER

EFI Main Relay <--> [Main Relay (Computer/Fuel System)] > < Fuel Pump Relay