Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT BRAKE FLUID LEVEL IN RESERVOIR

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2. INSPECT BRAKE BOOSTER ASSEMBLY

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3. REMOVE FRONT WIPER MOTOR AND LINK ASSEMBLY

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4. REMOVE OUTER COWL TOP PANEL SUB-ASSEMBLY

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5. INSPECT VACUUM WARNING SWITCH ASSEMBLY

(a) Start the engine and stop it after 1 or 2 minutes.

(b) Disconnect the connector from the vacuum warning switch assembly.

(c) Measure the resistance of the vacuum warning switch assembly.

Standard Resistance:

10 kΩ or higher

(d) With the engine stopped, depress the brake pedal several times to release vacuum from the brake booster assembly, and measure the resistance of the vacuum warning switch assembly.

Standard Resistance:

Below 1 Ω

(e) Connect the connector to the vacuum warning switch assembly.

6. INSTALL OUTER COWL TOP PANEL SUB-ASSEMBLY

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7. INSTALL FRONT WIPER MOTOR AND LINK ASSEMBLY

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