toyota Workshop Repair Guides

Toyota Workshop Service and Repair Manuals

Relays and Modules - Ignition System > < Main Relay (Computer/Fuel System)|Locations|Page 1934
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Main Relay (Computer/Fuel System): Testing and Inspection

INSPECTION

1. REMOVE EFI MAIN RELAY FROM ENGINE ROOM J/B NO. 2 (Marking:EFI)

2. INSPECT EFI MAIN RELAY CONTINUITY

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

If there is no continuity, replace the relay.

b. Check that no continuity exists between terminals 3 and 5.

If continuity exists, replace the relay.

3. INSPECT EFI MAIN RELAY OPERATION

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

If no continuity exists, replace the relay.

4. REINSTALL EFI MAIN RELAY

Relays and Modules - Ignition System > < Main Relay (Computer/Fuel System)|Locations|Page 1934