Lexus Workshop Service and Repair Manuals > RX 300 FWD V6-3.0L (1MZ-FE) (1999) > Engine, Cooling and Exhaust | Engine | Tune-up and Engine Performance Checks | Fuel Filter | Fuel Pressure Release | System Information | Service and Repair

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7. Turn the ignition switch OFF.
8. Disconnect the LEXUS hand-held tester from the DLC3.

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