Section 100 (Vacuum Diagrams): Introduction

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Lexus SC 430, 2003 Lexus RX 300, 2003 Lexus LX 470, 2003 Lexus LS 430, and 2003 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If vacuum diagram decal under the hood of vehicle is different from vacuum diagram included in this article, use information provided on underhood decal.

This article contains underhood views and vacuum diagrams of vacuum hose routing. Use these vacuum diagrams during the visual inspection in BASIC DIAGNOSTIC PROCEDURES article. This will assist in identifying improperly routed vacuum hoses which may cause driveability and/or computer-indicated malfunctions.

Fig 1: Vacuum Diagram (ES300 - 1 Of 3)

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Fig 2: Vacuum Diagram (ES300 - 2 Of 3)

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Fig 3: Vacuum Diagram (ES300 - 3 Of 3)

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Fig 4: Vacuum Diagram (GS300 - 1 Of 3)

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Fig 5: Vacuum Diagram (GS300 - 2 Of 3)

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Fig 6: Vacuum Diagram (GS300 - 3 Of 3)

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Fig 7: Vacuum Diagram (GS430 - 1 Of 3)

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Fig 8: Vacuum Diagram (GS430 - 2 Of 3)

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Fig 9: Vacuum Diagram (GS430 - 3 Of 3)

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Fig 10: Vacuum Diagram (GX470 - 1 Of 2)

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Fig 11: Vacuum Diagram (GX470 - 2 Of 2)

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Fig 12: Vacuum Diagram (IS300 - 1 Of 3)

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Fig 13: Vacuum Diagram (IS300 - 2 Of 3)

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Fig 14: Vacuum Diagram (IS300 - 3 Of 3)

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Fig 15: Vacuum Diagram (LS430 - 1 Of 3)

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Fig 16: Vacuum Diagram (LS430 - 2 Of 3)

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Fig 17: Vacuum Diagram (LS430 - 3 Of 3)

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Fig 18: Vacuum Diagram (LX470 - 1 Of 3)

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Fig 19: Vacuum Diagram (LX470 - 2 Of 3)

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Fig 20: Vacuum Diagram (LX470 - 3 Of 3)

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Fig 21: Vacuum Diagram (RX300 - 1 Of 3)

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Fig 22: Vacuum Diagram (RX300 - 2 Of 3)

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Fig 23: Vacuum Diagram (RX300 - 3 Of 3)

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Fig 24: Vacuum Diagram (SC430)

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