Sequoia 4WD V8-4.7L (2UZ-FE) (2006)
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Main Relay (Computer/Fuel System): Testing and Inspection
ON-VEHICLE INSPECTION
1. REMOVE RELAY BOX COVER
2. REMOVE CIRCUIT OPENING RELAY
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
