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Toyota Workshop Service and Repair Manuals

EFI Main Relay <--> [Main Relay (Computer/Fuel System)] > < Component Tests and General Diagnostics|Page 131
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Resistance At ECU Wiring Connectors

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The tester probe should be inserted into the wiring connector from the wiring side.

Check the resistance between each terminal of the wiring connectors.
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Disconnect the connectors from the ECU.

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Measure the resistance at each terminal.

EFI Main Relay <--> [Main Relay (Computer/Fuel System)] > < Component Tests and General Diagnostics|Page 131