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Home >> Toyota >> 2011 >> Tundra 4WD V8-4.6L (1UR-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Main Relay (Computer/Fuel System) >> Testing and Inspection
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Main Relay (Computer/Fuel System): Testing and Inspection





1UR-FE ENGINE CONTROL SYSTEM: EFI RELAY: ON-VEHICLE INSPECTION

1. REMOVE INTEGRATION RELAY Component Tests and General Diagnostics

2. INSPECT INTEGRATION RELAY (EFI)

NOTICE:
* Some relays are built into the integration relay. The integration relay cannot be disassembled. If there is a malfunction in the circuit of the integration relay, replace the integration relay.
* The internal circuit of the integration relay is as shown in the illustration below. Inspect the integration relay using the following procedures.





(a) Measure the resistance of the EFI No. 1 fuse.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the EFI No. 1 fuse.

(b) Measure the resistance of the EFI relay.





(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





If the result is not as specified, replace the integration relay.

3. INSTALL INTEGRATION RELAY Component Tests and General Diagnostics
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