lexus Workshop Repair Guides

Lexus Workshop Service and Repair Manuals

Relays and Modules - Fuel Delivery and Air Induction > < EFI Main Relay <--> [Main Relay (Computer/Fuel System)]|Locations
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EFI Main Relay: Testing and Inspection

EFI MAIN RELAY INSPECTION

1. Remove EFI main relay.

LOCATION: In the engine compartment relay box.

2. Inspect EFI main relay.
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Inspect relay continuity
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Using an ohmmeter, check that there is continuity between terminals 1 and 3.

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If there is no continuity, replace the relay.

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Check that there is no continuity between terminals 2 and 4.

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If there is continuity, replace the relay.

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Inspect relay operation
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Apply battery voltage across terminals 1 and 3.

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Using an ohmmeter, check that there is continuity between terminals 2 and 4.

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If there is no continuity, replace the relay.

3. Reinstall EFI main relay.

Relays and Modules - Fuel Delivery and Air Induction > < EFI Main Relay <--> [Main Relay (Computer/Fuel System)]|Locations