Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Intake Air Control Valve (for Acis)

On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT INTAKE AIR CONTROL VALVE (for ACIS)

(a) Remove the V-bank cover sub-assembly.

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(b) Disconnect the vacuum hose sub-assembly from the intake air control valve (for ACIS).

(c) Connect a hose and vacuum pump to the intake air control valve (for ACIS).

(d) Using the vacuum pump, apply a vacuum to the intake air control valve (for ACIS). Check that the actuator rod operates when vacuum is applied. If the actuator rod does not operate when vacuum is applied, replace the intake air surge tank assembly.

*a Actuator Rod

(e) Using the vacuum pump, apply a vacuum to the intake air control valve (for ACIS). Check that there is no change in vacuum after 1 minute.

If the actuator rod does not operate when vacuum is applied, replace the intake air surge tank assembly.

(f) Disconnect the hose and vacuum pump from the intake air control valve (for ACIS).

(g) Connect the vacuum hose sub-assembly to the intake air control valve (for ACIS).

(h) Install the V-bank cover sub-assembly.

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